WATER-REPELLENT COATING CLAD ARTICLES AND PROCESS FOR PRODUCING THE SAME
First Claim
Patent Images
1. A water-repellent film coated article comprising a base material and a water-repellent film formed on a surface of the base material, wherein the water-repellent film is made mainly of silicon oxide and has an arithmetic mean roughness (Ra) of more than 0.5 nm but not more than 3.0 nm (0.5 nm<
- Ra≦
3.0 nm) as measured on a surface thereof, and wherein a dynamic coefficient of friction between the surface of the water-repellent film and a wiper rubber under a dried condition is 0.5 or less when allowing the wiper rubber to move at a velocity of 50 cm/min on the surface of the water-repellent film while contacting therewith.
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Abstract
The present invention relates to a water-repellent film coated article comprising a base material and a water-repellent film formed on a surface of the base material, wherein the water-repellent film is made mainly of silicon oxide and has an arithmetic mean roughness (Ra) of more than 0.5 nm but not more than 3.0 nm (0.5 nm<Ra≦3.0 nm) as measured on a surface thereof. The water-repellent film coated article is excellent in water repellency and durability, and exhibits an excellent wiper operating characteristic on the surface thereof to thereby prevent occurrence of judder.
17 Citations
20 Claims
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1. A water-repellent film coated article comprising a base material and a water-repellent film formed on a surface of the base material, wherein the water-repellent film is made mainly of silicon oxide and has an arithmetic mean roughness (Ra) of more than 0.5 nm but not more than 3.0 nm (0.5 nm<
- Ra≦
3.0 nm) as measured on a surface thereof, and wherein a dynamic coefficient of friction between the surface of the water-repellent film and a wiper rubber under a dried condition is 0.5 or less when allowing the wiper rubber to move at a velocity of 50 cm/min on the surface of the water-repellent film while contacting therewith. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 18, 19, 20)
- Ra≦
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2. (canceled)
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13. A process for producing a water-repellent film coated article comprising the steps of:
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applying a coating solution comprising (A) 0.01 to 2% by mass (In terms of silica) of silicon alkoxide and/or a hydrolyzate thereof, (B) 0.00001 to 0.15% by mass (in terms of silica) of a fluoroalkyl group-containing silane compound, (C) 0.001 to 3 N of an acid and (D) 0 to 20% by mass of water, or a coating solution prepared by dissolving (E) a chlorosilyl group-containing compound and (B) the fluoroalkyl group-containing silane compound in a solvent containing (F) alcohol and/or water to replace a chloro group of the chlorosilyl group-containing compound with an alkoxyl group or a hydroxyl group, onto a base material at a temperature of from 10 to 40°
C. and an absolute humidity of from 4.5×
10−
3 to 18×
10−
3 kg/kg (DA); anddrying the applied coating solution at a temperature of from 10 to 40°
C. and an absolute humidity of from 4.5×
10−
3 to 18×
10−
3 kg/kg (DA).
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14. A process for producing a water-repellent film coated article comprising the steps of:
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applying an undercoat layer coating solution containing (A) 0.01 to 3% by mass (in terms of silica) of silicon alkoxide and/or a hydrolyzate thereof, (C) 0.001 to 1 N of an acid and (D) 0 to 10% by mass of water, on a base material at a temperature of from 10 to 40°
C. and an absolute humidity of from 4.5×
10−
3 to 18×
10−
3 kg/kg (DA);then drying the applied undercoat layer coating solution at a temperature of from 10 to 40°
C. and an absolute humidity of from 4.5×
10−
3 to 18×
10−
3 kg/kg (DA) to form an undercoat layer; andapplying a water-repellent layer coating solution containing a fluoroalkyl group- and/or a hydrolyzable group-containing organosilane, onto a surface of the undercoat layer, and then drying the applied water-repellent layer coating solution at a temperature of from 10 to 40°
C. and an absolute humidity of from 4.5×
10−
3 to 18×
10−
3 kg/kg (DA) to form a water-repellent layer.
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Specification
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Current AssigneeNippon Sheet Glass Company Limited (Nippon Telegraph and Telephone Corporation)
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Original AssigneeNippon Sheet Glass Company Limited (Nippon Telegraph and Telephone Corporation)
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InventorsTeranishi, Toyoyuki
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Application NumberUS12/063,310Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current428/141CPC Class CodesC03C 17/009 Mixtures of organic and ino...C03C 17/25 by deposition from the liqu...C03C 2217/213 SiO2C03C 2217/241 with halidesC03C 2217/76 Hydrophobic and oleophobic ...C03C 2217/77 Coatings having a rough sur...C03C 2218/113 by sol-gel processesC08G 77/24 halogen-containing groupsC09D 4/00 Coating compositions, e.g. ...Y10T 428/24355 Continuous and nonuniform o...
