Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with a superhydrophilic photocatalytic surface, and method of making thereof
First Claim
1. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
- preparing a substrate coated with a photocatalytic layer comprised of a photocatalyst; and
, subjecting said photocatalyst to photoexcitation to thereby cause molecules of water to be physically adsorbed onto the surface of said photocatalytic layer under the photocatalytic action of the photocatalyst whereby the surface of the substrate is rendered hydrophilic.
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Abstract
The surface of a substrate is coated with an abrasion-resistant photocatalytic coating comprised of a semiconductor photocatalyst. Upon irradiation by a light having a wavelength of an energy higher than the bandgap energy of the photocatalyst, water is chemisorbed onto the surface in the form of hydroxyl groups (OH−) whereby the surface of the photocatalytic coating is rendered highly hydrophilic. In certain embodiments, the surface of a mirror, lens, or windowpane is coated with the photocatalytic coating to exhibit a high degree of antifogging function. In another embodiment, an article or product coated with the photocatalytic coating is disposed outdoors and the highly hydrophilic surface thereof is self-cleaned as it is subjected to rainfall. In a still another embodiment, an article is coated with the photocatalytic coating and, when the article is soaked in, rinsed by or wetted with water, fatty dirt and contaminants are readily released without resort to a detergent.
83 Citations
300 Claims
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1. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
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preparing a substrate coated with a photocatalytic layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby cause molecules of water to be physically adsorbed onto the surface of said photocatalytic layer under the photocatalytic action of the photocatalyst whereby the surface of the substrate is rendered hydrophilic.
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2. A composite with a hydrophilic surface, comprising:
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a substrate having a surface;
a photocatalytic layer comprised of a photocatalyst, said layer being bonded to the surface of said substrate; and
,molecules of water physically adsorbed onto the surface of said photocatalytic layer upon photoexcitation of the photocatalyst.
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3. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising a photocatalyst operable upon photoexcitation thereof to cause molecules of water to be physically adsorbed onto the surface of said coating under the photocatalytic action of the photocatalyst to thereby render the surface hydrophilic.
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4. A composite with a hydrophilic surface, comprising:
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a substrate having a surface; and
,a photocatalytic layer comprised of a photocatalyst, said layer being bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 5°
in terms of the contact angle with water. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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5. An antifogging transparent sheet member comprising:
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a transparent substrate having a surface; and
,a substantially transparent photocatalytic layer comprised of a photocatalyst, said photocatalytic layer being bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic on the order of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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6. An antifogging mirror comprising:
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a substrate having a surface and a reflective coating; and
,a substantially transparent photocatalytic layer comprised of a photocatalyst, said photocatalytic layer being bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic on the order of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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7. An antifogging lens comprising:
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a transparent lens-forming body having a surface; and
,a substantially transparent photocatalytic layer comprised of a photocatalyst, said photocatalytic layer being bonded to the surface of said lens-forming body;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic on the order of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the lens-forming body from being fogged or blurred with adherent moisture condensate and/or water droplets.
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29. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
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preparing a substrate coated with a layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water. - View Dependent Claims (38, 39)
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30. An antifogging method for preventing a transparent sheet member from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
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preparing a transparent sheet member coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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31. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
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preparing a mirror coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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32. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
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preparing a lens coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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33. A method for cleaning a substrate, comprising the steps of:
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preparing a substrate coated with a layer comprised of a photocatalyst;
disposing said substrate outdoors;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,subjecting said substrate to rainfall whereby deposits and/or contaminants adhering on the surface of said layer are washed away by rainwater.
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34. A method for cleaning a substrate, comprising the steps of:
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preparing a substrate coated with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,rinsing said substrate with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom and washed away by water.
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35. A method for cleaning a substrate, comprising the steps of:
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preparing a substrate coated with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,causing said substrate soaked in or wetted with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom.
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36. A method for maintaining a surface of a substrate disposed outdoors clean, comprising the steps of:
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preparing a substrate coated with a layer comprised of a photocatalyst;
disposing said substrate outdoors; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby contaminants are prevented from adhering to the surface of said substrate as contaminant-laden rainwater flows therealong.
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37. A method for preventing growth of water droplets adhering on a substrate, comprising the steps of:
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preparing a substrate coated with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,causing adherent moisture condensate and/or water droplets to spread over the surface of said layer.
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40. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
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coating the surface of the substrate with a layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water. - View Dependent Claims (49, 50)
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41. An antifogging method for preventing a transparent sheet member from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
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preparing a transparent sheet member;
coating the surface of said transparent sheet member with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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42. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
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preparing a mirror;
coating the surface of said mirror with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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43. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
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preparing a lens;
coating the surface of said lens with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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44. A method for cleaning a substrate, comprising the steps of:
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preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
disposing said substrate outdoors;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,subjecting said substrate to rainfall whereby deposits and/or contaminants adhering on the surface of said layer are washed away by rainwater.
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45. A method for cleaning a substrate, comprising the steps of:
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preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,rinsing said substrate with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom and washed away by water.
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46. A method for cleaning a substrate, comprising the steps of:
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preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,causing said substrate soaked in or wetted with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom.
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47. A method for maintaining a surface of a substrate disposed outdoors clean, comprising the steps of:
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preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
disposing said substrate outdoors; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water whereby contaminants are prevented from adhering to the surface of said substrate as contaminant-laden rainwater flows therealong.
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48. A method for preventing growth of water droplets adhering on a substrate, comprising the steps of:
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preparing a substrate having a surface;
coating the surface of said substrate with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 5°
in terms of the contact angle with water; and
,causing adherent moisture condensate and/or water droplets to spread over the surface of said layer.
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51. A method of manufacturing a composite with a hydrophilic surface, comprising the steps of:
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preparing a substrate having a surface; and
,coating the surface of said substrate with a photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 5°
in terms of the contact angle with water. - View Dependent Claims (56)
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52. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
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preparing a transparent substrate having a surface; and
,coating the surface of said substrate with a substantially transparent photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 5°
in terms of the contact angle with water.
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53. A method of manufacturing a self-cleaning composite, comprising the steps of:
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preparing a substrate having a surface; and
,coating the surface of said substrate with a photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 5°
in terms of the contact angle with water.
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54. A method of manufacturing an antifogging mirror, comprising the steps of:
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preparing a substrate with or without a reflective coating, said substrate having a surface;
coating the surface of said substrate with a substantially transparent photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 5°
in terms of the contact angle with water; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of coating.
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55. A method of manufacturing an antifogging lens, comprising the steps of:
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preparing a lens-forming body having a surface; and
,coating the surface of said body with a substantially transparent photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 5°
in terms of the contact angle with water. - View Dependent Claims (57, 58, 59, 60, 61, 62)
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63. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising a photocatalyst operable upon photoexcitation thereof to render the surface of said coating hydrophilic on the order of less than about 5°
- in terms of the contact angle with water.
- View Dependent Claims (64, 65, 66, 67, 68, 69)
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70. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 5°
in terms of the contact angle with water.
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71. An antifogging transparent sheet member comprising:
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a transparent substrate; and
,a substantially transparent photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface of said layer presents a water wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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72. An antifogging mirror comprising:
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a substrate with a reflective coating; and
,a substantially transparent photocatalytic layer bonded to the front surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface of said layer presents a water wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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73. An antifogging lens comprising:
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a transparent lens-forming body; and
,a substantially transparent photocatalytic layer bonded to the surface of said lens-forming body and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface of said layer presents a water wettability of less than about 5°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the lens-forming body from being fogged or blurred with adherent moisture condensate and/or water droplets.
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74. A composite with a hydrophilic surface, comprising:
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a substrate having a surface; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating in which particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby adherent deposits and/or contaminants are washed away by rainwater to self-clean the composite as it is subjected to rainfall.
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75. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby contaminants are prevented from adhering to the surface of the composite as contaminant-laden rainwater flows therealong.
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76. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the composite with water.
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77. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent growth of water droplets.
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78. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby adherent water droplets are caused to spread over the surface of said layer to thereby promote drying of the composite after wetted with water.
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79. A composite with a hydrophilic surface, comprising:
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a substrate;
a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed; and
,a hydrophilic protective layer covering said photocatalytic layer;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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80. A composite with a hydrophilic surface, comprising:
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a substrate;
a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed; and
,a protective layer covering said photocatalytic layer, said protective layer being adapted to be rendered hydrophilic upon photoexcitation;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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81. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed, said photocatalyst comprising an oxide selected from the group consisting of TiO2, ZnO, SnO2, SrTiO3, WO3, Bi2O3 and Fe2O3;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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82. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst comprising the anatase form of titania are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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83. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst comprising the rutile form of titania are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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84. A composite with a hydrophilic surface, comprising:
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a substrate;
a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst comprising the rutile form of titania are uniformly dispersed, said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic; and
,an intermediate layer of a non-decomposable material interleaved between said substrate and said photocatalytic layer.
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85. A composite with a hydrophilic surface, comprising:
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a substrate, said substrate containing alkaline metal ions and/or alkaline-earth metal ions;
a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst comprising the rutile form of titania are uniformly dispersed, said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic; and
,a diffusion prevention thin film interleaved between said substrate and said photocatalytic layer to prevent said ions from diffusing from said substrate into said photocatalytic layer. - View Dependent Claims (86)
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87. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalytic layer having a thickness of less than about 0.2 micrometers;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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88. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalytic layer further comprising a metal selected from the group consisting of Ag, Cu and Zn;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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89. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalytic layer further comprising a metal selected from the group consisting of Pt, Pd, Rh, Ru, Os and Ir;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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90. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a coating wherein particles of a photocatalyst are uniformly dispersed;
said photocatalyst operating upon photoexcitation thereof to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water. - View Dependent Claims (91)
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92. A composite with a hydrophilic surface, comprising:
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a substrate having a surface; and
,a photocatalytic layer bonded to the surface of said substrate, said photocatalytic layer comprising a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic.
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93. An antifogging transparent sheet member comprising:
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a transparent substrate; and
,a substantially transparent photocatalytic layer bonded to the surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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94. An antifogging mirror comprising:
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a substrate with a reflective coating; and
,a substantially transparent photocatalytic layer bonded to the front surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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95. An antifogging lens comprising:
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a transparent lens-forming body; and
,a substantially transparent photocatalytic layer bonded to the surface of said lens-forming body and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the lens-forming body from being fogged or blurred with adherent moisture condensate and/or water droplets.
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96. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby adherent deposits and/or contaminants are washed away by rainwater to self-clean the composite as it is subjected to rainfall.
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97. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby contaminants are prevented from adhering to the surface of the composite as contaminant-laden rainwater flows therealong.
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98. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the composite with water.
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99. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent growth of water droplets.
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100. A composite with a hydrophilic surface, comprising:
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a substrate; and
,a photocatalytic layer bonded to the surface of said substrate and comprised of a photocatalyst and SiO2 or SnO2;
said photocatalyst operating upon photoexcitation thereof to render the surface of the composite hydrophilic whereby adherent water droplets are caused to spread over the surface of said layer to thereby promote drying of the composite after wetted with water. - View Dependent Claims (101, 102)
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103. A composite with a hydrophilic surface, comprising:
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a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the composite hydrophilic. - View Dependent Claims (112)
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104. An antifogging transparent sheet member comprising:
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a transparent substrate having a surface; and
,a substantially transparent photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the sheet member hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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105. An antifogging mirror comprising:
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a substrate having a surface and a reflective coating; and
,a substantially transparent photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the mirror hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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106. An antifogging lens comprising:
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a transparent lens-forming body having a surface; and
,a substantially transparent photocatalytic coating bonded to the surface of said lens-forming body and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the lens hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the body from being fogged or blurred with adherent moisture condensate and/or water droplets.
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107. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the composite hydrophilic whereby adherent deposits and/or contaminants are washed away by rainwater to self-clean the composite as it is subjected to rainfall.
-
-
108. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the composite hydrophilic whereby contaminants are prevented from adhering to the surface of the composite as contaminant-laden rainwater flows therealong.
-
-
109. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the composite hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the composite with water.
-
-
110. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the composite hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
-
-
111. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein due to photoexcitation of said photocatalyst said organic group at the surface of said photocatalytic coating are substituted at least in part with hydroxyl groups under the photocatalytic action of the photocatalyst thereby rendering the surface of the composite hydrophilic whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the composite after wetted with water. - View Dependent Claims (113, 156, 195)
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114. An antifogging sheet glass adapted to prevent moisture condensate and/or water droplets adhering on the surface thereof from fogging or blurring the sheet glass, said sheet glass comprising:
-
a transparent substrate having a surface; and
,a substantially transparent coating of silicone which is bonded to the surface of said substrate and in which particles of a photocatalyst are uniformly dispersed, said silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups whereby the surface of said substrate is rendered highly hydrophilic.
-
-
115. An antifogging mirror adapted to prevent moisture condensate and/or water droplets adhering on the surface thereof from fogging or blurring the mirror, said mirror comprising:
-
a substrate having a surface and a reflective coating; and
,a substantially transparent coating of silicone which is bonded to the surface of said substrate and in which particles of a photocatalyst are uniformly dispersed, said silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups whereby the surface of said substrate is rendered highly hydrophilic.
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-
116. An antifogging lens adapted to prevent moisture condensate and/or water droplets adhering on the surface thereof from fogging or blurring the lens, said lens comprising:
-
a transparent lens-forming body having a surface; and
,a substantially transparent coating of silicone which is bonded to the surface of said body and in which particles of a photocatalyst are uniformly dispersed, said silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups whereby the surface of said substrate is rendered highly hydrophilic.
-
-
117. A composite with a hydrophilifiable surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water.
-
-
118. A composite with a hydrophilifiable surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water whereby adherent deposits and/or contaminants are washed away by rainwater to self-clean the composite as it is subjected to rainfall.
-
-
119. A composite with a hydrophilifiable surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water whereby contaminants are prevented from adhering to the surface of the composite as contaminant-laden rainwater flows therealong.
-
-
120. A composite with a hydrophilifiable surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the composite with water.
-
-
121. A composite with a hydrophilifiable surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
-
-
122. A composite with a hydrophilifiable surface, comprising:
-
a substrate having a surface; and
,a photocatalytic coating bonded to the surface of said substrate and comprised of a photocatalyst and silicone having organic groups bonded to silicon atoms of silicone molecules;
wherein said organic groups at the surface of said coating are capable of being substituted, upon photoexcitation of said photocatalyst, at least in part with hydroxyl groups to render the surface of said composite hydrophilic such that the surface of said composite presents a water wettability of less than about 10°
in terms of the contact angle with water whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the composite after wetted with water.
-
-
123. A method of manufacturing a composite with a hydrophilifiable surface, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising crystalline titania particles dispersed in a precursor of amorphous silica; and
,subjecting said precursor to hydrolysis where necessary and to dehydration polymerization to thereby form on said surface a photo-reactive layer of titania particles bound by amorphous silica. - View Dependent Claims (128)
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-
124. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
applying onto the surface of the substrate a suspension comprising crystalline titania particles dispersed in a precursor of amorphous silica; and
,subjecting said precursor to hydrolysis where necessary and to dehydration polymerization to thereby form on said surface a substantially transparent photo-reactive layer of titania particles bound by amorphous silica.
-
-
125. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising crystalline titania particles dispersed in a precursor of amorphous silica; and
,subjecting said precursor to hydrolysis where necessary and to dehydration polymerization to thereby form on said surface a photo-reactive layer of titania particles bound by amorphous silica.
-
-
126. A method of manufacturing an antifogging mirror, comprising the steps of:
-
preparing a substrate with or without a reflective coating, said substrate having a surface;
applying onto the surface of the substrate a suspension comprising crystalline titania particles dispersed in a precursor of amorphous silica;
subjecting said precursor to hydrolysis where necessary and to dehydration polymerization to thereby form on said surface a substantially transparent photo-reactive layer of titania particles bound by amorphous silica; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of applying a suspension.
-
-
127. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
applying onto the surface of the substrate a suspension comprising crystalline titania particles dispersed in a precursor of amorphous silica; and
,subjecting said precursor to hydrolysis where necessary and to dehydration polymerization to thereby form on said surface a substantially transparent photo-reactive layer of titania particles bound by amorphous silica.
-
-
129. A method of manufacturing a composite with a hydrophilifiable surface, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of silica dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to form a thin film of amorphous titania in which particles of silica are dispersed; and
,heating said film at a temperature less than the softening point of the substrate to transform amorphous titania into crystalline titania to thereby form a photo-reactive coating of photocatalytic titania in which particles of silica are dispersed. - View Dependent Claims (134)
-
-
130. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of silica dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to form a thin film of amorphous titania in which particles of silica are dispersed; and
,heating said film at a temperature less than the softening point of the substrate to transform amorphous titania into crystalline titania to thereby form a substantially transparent photo-reactive coating of photocatalytic titania in which particles of silica are dispersed.
-
-
131. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of silica dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to form a thin film of amorphous titania in which particles of silica are dispersed; and
,heating said film at a temperature less than the softening point of the substrate to transform amorphous titania into crystalline titania to thereby form a photo-reactive coating of photocatalytic titania in which particles of silica are dispersed.
-
-
132. A method of manufacturing an antifogging mirror, comprising the steps of:
-
preparing a substrate with or without a reflective coating, said substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of silica dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to form a thin film of amorphous titania in which particles of silica are dispersed;
heating said film at a temperature less than the softening point of the substrate to transform amorphous titania into crystalline titania to thereby form a substantially transparent photo-reactive coating of photocatalytic titania in which particles of silica are dispersed; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of applying a suspension.
-
-
133. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
applying onto the surface of the body a suspension comprising particles of silica dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to form a thin film of amorphous titania in which particles of silica are dispersed; and
,heating said film at a temperature less than the softening point of the body to transform amorphous titania into crystalline titania to thereby form a substantially transparent photo-reactive coating of photocatalytic titania in which particles of silica are dispersed.
-
-
135. A method of manufacturing a composite with a hydrophilifiable surface, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of crystalline titania and particles of silica; and
,heating said substrate at a temperature less than the softening point thereof to bond particles to said substrate and to sinter particles with each other to thereby form a photo-reactive coating comprised of sintered particles of titania and silica.
-
-
136. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of crystalline titania and particles of silica; and
,heating said substrate at a temperature less than the softening point thereof to bond particles to said substrate and to sinter particles with each other to thereby form a substantially transparent photo-reactive coating comprised of sintered particles of titania and silica.
-
-
137. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of crystalline titania and particles of silica; and
,heating said substrate at a temperature less than the softening point thereof to bond particles to said substrate and to sinter particles with each other to thereby form a photo-reactive coating comprised of sintered particles of titania and silica.
-
-
138. A method of manufacturing an antifogging mirror, comprising the steps of:
-
preparing a substrate with or without a reflective coating, said substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of crystalline titania and particles of silica;
heating said substrate at a temperature less than the softening point thereof to bond particles to said substrate and to sinter particles with each other to thereby form a substantially transparent photo-reactive coating comprised of sintered particles of titania and silica; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of applying a suspension.
-
-
139. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
applying onto the surface of the body a suspension comprising particles of crystalline titania and particles of silica; and
,heating said body at a temperature less than the softening point thereof to bond particles to said substrate and to sinter particles with each other to thereby form a substantially transparent photo-reactive coating comprised of sintered particles of titania and silica.
-
-
140. A method of manufacturing a composite with a hydrophilifiable surface, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of the anatase form of titania and particles of tin oxide; and
,heating said substrate at a temperature of less than 900°
C. to bond particles to said substrate and to sinter particles with each other to thereby form a photo-reactive coating comprised of sintered particles of titania and tin oxide.
-
-
141. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of the anatase form of titania and particles of tin oxide; and
,heating said substrate at a temperature of less than 900°
C. to bond particles to said substrate and to sinter particles with each other to thereby form a substantially transparent photo-reactive coating comprised of sintered particles of titania and tin oxide.
-
-
142. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of the anatase form of titania and particles of tin oxide; and
,heating said substrate at a temperature of less than 900°
C. to bond particles to said substrate and to sinter particles with each other to thereby form a photo-reactive coating comprised of sintered particles of titania and tin oxide.
-
-
143. A method of manufacturing an antifogging mirror, comprising the steps of:
-
preparing a substrate with or without a reflective coating, said substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of the anatase form of titania and particles of tin oxide;
heating said substrate at a temperature of less than 900°
C. to bond particles to said substrate and to sinter particles with each other to thereby form a substantially transparent photo-reactive coating comprised of sintered particles of titania and tin oxide; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of applying a suspension.
-
-
144. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
applying onto the surface of the substrate a suspension comprising particles of the anatase form of titania and particles of tin oxide;
heating said body at a temperature of less than 900°
C. to bond particles to said substrate and to sinter particles with each other to thereby form a substantially transparent photo-reactive coating comprised of sintered particles of titania and tin oxide.
-
-
145. A method of manufacturing a composite with a hydrophilifiable surface, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of tin oxide dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to thereby form a thin film of amorphous titania in which particles of tin oxide are dispersed; and
,heating said thin film at a temperature of less than 900°
C. to transform amorphous titania into crystalline titania to thereby form a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed.
-
-
146. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of tin oxide dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to thereby form a thin film of amorphous titania in which particles of tin oxide are dispersed; and
,heating said thin film at a temperature of less than 900°
C. to transform amorphous titania into crystalline titania to thereby form a substantially transparent photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed.
-
-
147. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of tin oxide dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to thereby form a thin film of amorphous titania in which particles of tin oxide are dispersed; and
,heating said thin film at a temperature of less than 900°
C. to transform amorphous titania into crystalline titania to thereby form a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed.
-
-
148. A method of manufacturing an antifogging mirror, comprising the steps of:
-
preparing a substrate with or without a reflective coating, said substrate having a surface;
applying onto the surface of the substrate a suspension comprising particles of tin oxide dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to thereby form a thin film of amorphous titania in which particles of tin oxide are dispersed;
heating said thin film at a temperature of less than 900°
C. to transform amorphous titania into crystalline titania to thereby form a substantially transparent photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of applying a suspension.
-
-
149. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
applying onto the surface of the body a suspension comprising particles of tin oxide dispersed in a solution of an organic compound of titanium;
subjecting said compound to hydrolysis and dehydration polymerization to thereby form a thin film of amorphous titania in which particles of tin oxide are dispersed; and
,heating said thin film at a temperature of less than 900°
C. to transform amorphous titania into crystalline titania to thereby form a substantially transparent photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed.
-
-
150. A method of manufacturing a composite with a hydrophilic surface, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a coating composition comprising particles of a photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed, said silicone coating having organic groups bonded to silicon atoms of silicone molecules; and
,subjecting the photocatalyst to photoexcitation so that said organic groups at the surface of the coating are substituted at least in part with hydroxyl groups. - View Dependent Claims (155)
-
-
151. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
applying onto the surface of the substrate a coating composition comprising particles of a photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
curing said film-forming element to form a substantially transparent silicone coating in which particles of the photocatalyst are uniformly dispersed, said silicone coating having organic groups bonded to silicon atoms of silicone molecules; and
,subjecting the photocatalyst to photoexcitation so that said organic groups at the surface of the coating are substituted at least in part with hydroxyl groups.
-
-
152. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
applying onto the surface of the substrate a coating composition comprising particles of a photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed, said silicone coating having organic groups bonded to silicon atoms of silicone molecules; and
,subjecting the photocatalyst to photoexcitation so that said organic groups at the surface of the coating are substituted at least in part with hydroxyl groups.
-
-
153. A method of manufacturing an antifogging mirror, comprising the steps of:
-
preparing a substrate with or without a reflective coating, said substrate having a surface;
applying onto the surface of the substrate a coating composition comprising particles of a photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
curing said film-forming element to form a substantially transparent silicone coating in which particles of the photocatalyst are uniformly dispersed, said silicone coating having organic groups bonded to silicon atoms of silicone molecules;
subjecting the photocatalyst to photoexcitation so that said organic groups at the surface of the coating are substituted at least in part with hydroxyl groups; and
,forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of applying a coating composition.
-
-
154. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
applying onto the surface of the body a coating composition comprising particles of a photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
curing said film-forming element to form a substantially transparent silicone coating in which particles of the photocatalyst are uniformly dispersed, said silicone coating having organic groups bonded to silicon atoms of silicone molecules; and
,subjecting the photocatalyst to photoexcitation so that said organic groups at the surface of the coating are substituted at least in part with hydroxyl groups.
-
-
157. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic on the order of less than about 10°
in terms of the contact angle with water.
-
-
158. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic;
said coating having the surface thus rendered hydrophilic being operable to permit adherent moisture condensate and/or water droplets to spread thereover to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
-
-
159. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic;
said coating having the surface thus rendered hydrophilic being operable to permit adherent deposits and/or contaminants to be washed away by rainwater as said substrate is subjected to rainfall to thereby permit self-cleaning of the substrate.
-
-
160. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic;
said coating having the surface thus rendered hydrophilic being operable to prevent contaminants from adhering to the surface thereof as contaminant-laden rainwater flows therealong.
-
-
161. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic;
said coating having the surface thus rendered hydrophilic being operable to release adherent deposits and/or contaminants when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
-
-
162. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic;
said coating having the surface thus rendered hydrophilic being operable to cause adherent moisture condensate and/or water droplets to spread over the surface of the coating to thereby prevent growth of water droplets.
-
-
163. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic;
said coating having the surface thus rendered hydrophilic being operable to cause adherent water droplets to spread over the surface of the coating to thereby promote drying of the substrate after wetted with water.
-
-
164. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous silica and capable of forming a coating of amorphous silica when cured, said precursor being tetraalkoxysilane, silanol, polysiloxane having an average molecular weight of less than 3000, or a mixture thereof; and
,particles of photocatalytic titania dispersed in said film-forming element for rendering upon photoexcitation the surface of said coating hydrophilic.
-
-
165. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic on the order of less than about 10°
in terms of the contact angle with water.
-
-
166. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
-
-
167. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent deposits and/or contaminants are away by rainwater as said substrate is subjected to rainfall to thereby permit self-cleaning of the substrate.
-
-
168. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby contaminants are prevented from adhering to the surface of the substrate as contaminant-laden rainwater flows therealong.
-
-
169. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
-
-
170. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
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171. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the substrate after wetted with water.
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172. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination, said precursor being selected from the group consisting of an alkoxide of titanium, a chelate of titanium and an acetate of titanium; and
,particles of silica dispersed in said film-forming element;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic.
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173. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic on the order of less than about 10°
in terms of the contact angle with water.
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174. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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175. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent deposits and/or contaminants are away by rainwater as said substrate is subjected to rainfall to thereby permit self-cleaning of the substrate.
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176. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby contaminants are prevented from adhering to the surface of the substrate as contaminant-laden rainwater flows therealong.
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177. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
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178. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
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179. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of silica;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and silica upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the substrate after wetted with water.
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180. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic on the order of less than about 10°
in terms of the contact angle with water.
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181. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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182. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent deposits and/or contaminants are away by rainwater as said substrate is subjected to rainfall to thereby permit self-cleaning of the substrate.
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183. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby contaminants are prevented from adhering to the surface of the substrate as contaminant-laden rainwater flows therealong.
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184. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
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185. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
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186. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a suspension comprising particles of photocatalytic titania and particles of tin oxide;
said coating composition being capable of forming a photo-reactive coating comprised of sintered particles of photocatalytic titania and tin oxide upon application on the substrate followed by sintering;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the substrate after wetted with water.
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187. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic on the order of less than about 10°
in terms of the contact angle with water.
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188. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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189. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent deposits and/or contaminants are away by rainwater as said substrate is subjected to rainfall to thereby permit self-cleaning of the substrate.
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190. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby contaminants are prevented from adhering to the surface of the substrate as contaminant-laden rainwater flows therealong.
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191. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
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192. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
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193. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising a precursor of amorphous titania and capable of forming a coating of photocatalytic titania upon curing and calcination; and
,particles of tin oxide dispersed in said film-forming element;
upon application on the substrate followed by calcination said coating composition being capable of forming a photo-reactive coating of photocatalytic titania in which particles of tin oxide are dispersed;
said photocatalytic titania rendering upon photoexcitation the surface of said coating hydrophilic whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the substrate after wetted with water.
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194. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic on the order of less than about 10°
in terms of the contact angle with water.
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196. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said coating to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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197. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic whereby adherent deposits and/or contaminants are away by rainwater as said substrate is subjected to rainfall to thereby permit self-cleaning of the substrate.
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198. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic whereby contaminants are prevented from adhering to the surface of the substrate as contaminant-laden rainwater flows therealong.
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199. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic whereby deposits and/or contaminants adhering to the surface are released therefrom when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
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200. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating to thereby prevent growth of water droplets.
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201. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising:
-
a film-forming element comprising uncured or partially cured silicone or a precursor thereof and capable of forming a coating of silicone when cured; and
,particles of photocatalytic titania dispersed in said film-forming element for causing upon photoexcitation the organic groups bonded to the silicon atoms of the silicone molecules at the surface of the coating to be substituted at least in part with hydroxyl groups in the presence of water under the photocatalytic action to thereby render the surface of said coating hydrophilic whereby adherent water droplets are caused to spread over the surface of the coating to thereby promote drying of the substrate after wetted with water.
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202. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of said layer hydrophilic.
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203. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water.
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204. An antifogging method for preventing a transparent sheet member from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
(a) preparing a transparent sheet member coated with a substantially transparent layer of silicone in which particles of a photocatalyst are uniformly dispersed; and
,(b) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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205. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
(a) preparing a lens coated with a substantially transparent layer of silicone in which particles of a photocatalyst are uniformly dispersed; and
,(b) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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206. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
(a) preparing a mirror coated with a substantially transparent layer of silicone in which particles of a photocatalyst are uniformly dispersed; and
,(b) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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207. A method for cleaning a substrate, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) disposing said substrate outdoors;
(c) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst whereby the surface of said layer is rendered hydrophilic; and
,(d) subjecting said substrate to rainfall whereby deposits and/or contaminants adhering on the surface of said layer are washed away by rainwater.
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208. A method for cleaning a substrate, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst whereby the surface of said layer is rendered hydrophilic; and
,(c) rinsing said substrate with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom and washed away by water.
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209. A method for cleaning a substrate, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst whereby the surface of said layer is rendered hydrophilic; and
,(c) causing said substrate soaked in or wetted with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom.
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210. A method for maintaining a surface of a substrate disposed outdoors clean, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) disposing said substrate outdoors; and
,(c) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of said layer hydrophilic whereby contaminants are prevented from adhering to the surface of said substrate as contaminant-laden rainwater flows therealong.
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211. A method for preventing growth of water droplets adhering on a substrate, comprising the steps of:
-
(a) preparing a substrate coated with a layer of silicone in which particles of a photocatalyst are uniformly dispersed;
(b) subjecting said photocatalyst of said layer to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said layer are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst whereby the surface of said layer is rendered hydrophilic; and
,(c) causing adherent moisture condensate and/or water droplets to spread over the surface of said layer.
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212. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
-
(a) applying onto the surface of said substrate a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(b) curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed; and
,(c) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic. - View Dependent Claims (213)
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214. An antifogging method for preventing a transparent sheet member from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
(a) preparing a transparent sheet member;
(b) applying onto the surface of said sheet member a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a substantially transparent silicone coating in which particles of the photocatalyst are uniformly dispersed; and
,(d) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating.
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215. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
(a) preparing a lens;
(b) applying onto the surface of the lens a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a substantially transparent silicone coating in which particles of the photocatalyst are uniformly dispersed; and
,(d) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating.
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216. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
(a) preparing a mirror;
(b) applying onto the surface of the mirror a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a substantially transparent silicone coating in which particles of the photocatalyst are uniformly dispersed; and
,(d) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of the coating.
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217. A method for cleaning a substrate, comprising the steps of:
-
(a) preparing a substrate;
(b) applying onto the surface of the substrate a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed;
(d) disposing said substrate outdoors;
(e) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic; and
,(f) subjecting said substrate to rainfall to thereby permit deposits and/or contaminants adhering on the surface of said layer to be washed away by rainwater.
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218. A method for cleaning a substrate, comprising the steps of:
-
(a) preparing a substrate;
(b) applying onto the surface of said substrate a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed;
(d) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic; and
,(e) rinsing said substrate with water to thereby permit organic deposits and/or contaminants adhering on the surface of said coating to be released therefrom and washed away by water.
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219. A method for cleaning a substrate, comprising the steps of:
-
(a) preparing a substrate;
(b) applying onto the surface of said substrate a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed;
(d) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic; and
,(e) causing said substrate soaked in or wetted with water to thereby permit organic deposits and/or contaminants adhering on the surface of the coating to be released therefrom.
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220. A method for maintaining a surface of a substrate disposed outdoors clean, comprising the steps of:
-
(a) preparing a substrate;
(b) applying onto the surface of the substrate a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed;
(d) disposing said substrate outdoors; and
,(e) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic whereby contaminants are prevented from adhering to the surface of said substrate as contaminant-laden rainwater flows therealong.
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221. A method for preventing growth of water droplets adhering on a substrate, comprising the steps of:
-
(a) preparing a substrate;
(b) applying onto the surface of said substrate a coating composition comprising particles of photocatalyst and a film-forming element of uncured or partially cured silicone or a precursor thereof;
(c) curing said film-forming element to form a silicone coating in which particles of the photocatalyst are uniformly dispersed;
(d) subjecting said photocatalyst to photoexcitation so that the organic groups bonded to the silicon atoms of the silicone molecules at the surface of said coating are substituted at least in part with hydroxyl groups under the photocatalytic action of said photocatalyst to thereby render the surface of the coating hydrophilic; and
,(e) causing adherent moisture condensate and/or water droplets to spread over the surface of said coating.
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222. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic layer comprised of a photocatalyst, said photocatalytic layer being bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface presents a water wettability of less than about 10°
in terms of the contact angle with water. - View Dependent Claims (226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 273, 274, 275, 276, 277, 278, 280, 281, 282, 283, 284, 285, 288, 294, 297, 299, 300)
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223. An antifogging transparent sheet member comprising:
-
a transparent substrate; and
,a substantially transparent layer comprised of a photocatalyst and bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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224. An antifogging mirror comprising:
-
a substrate with a reflective coating; and
,a substantially transparent layer comprised of a photocatalyst and bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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225. An antifogging lens comprising:
-
a transparent lens-forming body; and
,a substantially transparent layer comprised of a photocatalyst and bonded to the surface of said lens-forming body;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic such that the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the lens-forming body from being fogged or blurred with adherent moisture condensate and/or water droplets.
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245. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
-
preparing a substrate coated with a layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water. - View Dependent Claims (254, 255)
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246. An antifogging method for preventing a transparent sheet member from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a transparent sheet member coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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247. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a mirror coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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248. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a lens coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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249. A method for cleaning a substrate, comprising the steps of:
-
preparing a substrate coated with a layer comprised of a photocatalyst;
disposing said substrate outdoors;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water; and
,subjecting said substrate to rainfall whereby deposits and/or contaminants adhering on the surface of said layer are washed away by rainwater.
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250. A method for cleaning a substrate, comprising the steps of:
-
preparing a substrate coated with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water; and
,rinsing said substrate with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom and washed away by water.
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251. A method for cleaning a substrate, comprising the steps of:
-
preparing a substrate coated with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water; and
,causing said substrate soaked in or wetted with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom.
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252. A method for maintaining a surface of a substrate disposed outdoors clean, comprising the steps of:
-
preparing a substrate coated with a layer comprised of a photocatalyst;
disposing said substrate outdoors; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10 in terms of the contact angle with water whereby contaminants are prevented from adhering to the surface of said substrate as contaminant-laden rainwater flows therealong.
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253. A method for preventing growth of water droplets adhering on a substrate, comprising the steps of:
-
preparing a substrate coated with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water; and
,causing adherent moisture condensate and/or water droplets to spread over the surface of said layer.
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256. A method for rendering a surface of a substrate hydrophilic, comprising the steps of:
-
coating the surface of the substrate with a layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water. - View Dependent Claims (265, 266)
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257. An antifogging method for preventing a transparent sheet member from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a transparent sheet member;
coating the surface of said transparent sheet member with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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258. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a mirror;
coating the surface of said mirror with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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259. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a lens;
coating the surface of said lens with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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260. A method for cleaning a substrate, comprising the steps of:
-
preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
disposing said substrate outdoors;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water; and
,subjecting said substrate to rainfall whereby deposits and/or contaminants adhering on the surface of said layer are washed away by rainwater.
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261. A method for cleaning a substrate, comprising the steps of:
-
preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water; and
,rinsing said substrate with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom and washed away by water.
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262. A method for cleaning a substrate, comprising the steps of:
-
preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water; and
,causing said substrate soaked in or wetted with water whereby organic deposits and/or contaminants adhering on the surface of said layer are released therefrom.
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263. A method for maintaining a surface of a substrate disposed outdoors clean, comprising the steps of:
-
preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
disposing said substrate outdoors; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water whereby contaminants are prevented from adhering to the surface of said substrate as contaminant-laden rainwater flows therealong.
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264. A method for preventing growth of water droplets adhering on a substrate, comprising the steps of:
-
preparing a substrate;
coating the surface of said substrate with a layer comprised of a photocatalyst;
subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic until the surface of said layer presents a water-wettability of less than about 10°
in terms of the contact angle with water; and
,causing adherent moisture condensate and/or water droplets to spread over the surface of said layer.
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267. A method of manufacturing a composite with a hydrophilic surface, comprising the steps of:
-
preparing a substrate having a surface;
coating the surface of said substrate with a photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 10°
in terms of the contact angle with water; and
,subjecting said photocatalyst to photoexcitation until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water. - View Dependent Claims (272)
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268. A method of manufacturing an antifogging transparent sheet member, comprising the steps of:
-
preparing a transparent substrate having a surface;
coating the surface of said substrate with a substantially transparent photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 10°
in terms of the contact angle with water; and
,subjecting said photocatalyst to photoexcitation until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water.
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269. A method of manufacturing a self-cleaning composite, comprising the steps of:
-
preparing a substrate having a surface;
coating the surface of said substrate with a photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 10°
in terms of the contact angle with water; and
,subjecting said photocatalyst to photoexcitation until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water.
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270. A method of manufacturing an antifogging mirror, comprising the steps of:
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preparing a substrate with or without a reflective coating, said substrate having a surface;
coating the surface of said substrate with a substantially transparent photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 10°
in terms of the contact angle with water;
forming where necessary a reflective coating on the opposite surface of said substrate prior to or subsequent to or during the course of said step of coating; and
,subjecting said photocatalyst to photoexcitation until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water.
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271. A method of manufacturing an antifogging lens, comprising the steps of:
-
preparing a lens-forming body having a surface;
coating the surface of said body with a substantially transparent photo-reactive layer comprised of a photocatalyst and operable to present upon photoexcitation a water wettability of less than about 10°
in terms of the contact angle with water; and
,subjecting said photocatalyst to photoexcitation until the water wettability of said layer becomes less than about 10°
in terms of the contact angle with water.
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279. A coating composition for use in forming a photocatalytically hydrophilifiable coating on a substrate, said coating composition comprising a photocatalyst operable upon photoexcitation thereof to render the surface of said coating hydrophilic on the order of less than about 10°
- in terms of the contact angle with water.
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286. An antifogging transparent sheet member comprising:
-
a transparent substrate; and
,a substantially transparent layer comprised of a photocatalyst and bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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287. An antifogging mirror comprising:
-
a substrate with a reflective coating; and
,a substantially transparent layer comprised of a photocatalytic semiconductor material and bonded to the surface of said substrate;
said photocatalytic material operating upon photoexcitation thereof to render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the substrate from being fogged or blurred with adherent moisture condensate and/or water droplets.
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289. An antifogging lens comprising:
-
a transparent lens-forming body; and
,a substantially transparent layer comprised of a photocatalyst and bonded to the surface of said lens-forming body;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer to thereby prevent the lens-forming body from being fogged or blurred with adherent moisture condensate and/or water droplets.
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290. An antifogging method for preventing a mirror from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a mirror coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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291. An antifogging method for preventing a lens from being fogged or blurred with adherent moisture condensate and/or water droplets, said method comprising the steps of:
-
preparing a lens coated with a substantially transparent layer comprised of a photocatalyst; and
,subjecting said photocatalyst to photoexcitation to thereby render the surface of said layer hydrophilic whereby adherent moisture condensate and/or water droplets are caused to spread over the surface of said layer.
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292. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic layer comprised of a photocatalyst, said photocatalytic layer being bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic to permit adherent deposits and/or contaminants to be washed away by rainwater to thereby self-clean the composite as said composite is subjected to rainfall.
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293. A composite with a hydrophilic surface, comprising:
-
a substrate having a surface; and
,a photocatalytic layer comprised of a photocatalyst, said photocatalytic layer being bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic to thereby prevent contaminants from adhering to the surface thereof as contaminant-laden rainwater flows therealong.
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295. A composite with a hydrophilic surface, comprising:
-
a substrate; and
,a layer comprised of a photocatalyst and bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic to permit adherent deposits and/or contaminants to be released when soaked in or wetted with water to thereby facilitate cleansing of the substrate with water.
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296. A composite with a hydrophilic surface, comprising:
-
a substrate; and
,a layer comprised of a photocatalyst and bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic to permit adherent moisture condensate and/or water droplets to spread thereover to thereby prevent growth of water droplets.
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298. A composite with a hydrophilic surface, comprising:
-
a substrate; and
,a layer comprised of a photocatalyst and bonded to the surface of said substrate;
said photocatalyst operating upon photoexcitation thereof to render the surface of said layer hydrophilic to permit adherent moisture condensate and/or water droplets to spread thereover to thereby promote drying of the substrate after wetted with water.
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Specification