Coating responding to a visible light, coating film and article

• US 20030166765A1
• Filed: 11/08/2002
• Published: 09/04/2003
• Est. Priority Date: 11/17/2000
• Status: Abandoned Application

• Current Assignee: Ecodevice Laboratory Co., Ltd.
• Original Assignee: Ecodevice Laboratory Co., Ltd.
• Inventors: Sugihara, Shinichi
• Application Number:
  US10/169,739
• Publication Number:
  US 20030166765A1
• Time in Patent Office: Days
• US Class Current: 524/497
• CPC Class Codes: B01J 35/30 characterised by their physical properties
• CPC Class Codes: B01J 35/39 Photocatalytic properties
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C09D 7/61 inorganic

Abstract

A visible light responsive type paint comprising a binder, a visible light responsive type material and a solvent. A visible light responsive type coating film comprising a binder and a visible light responsive type material, and an article having this coating material. Said visible light responsive type material comprises at least anatase type titanium dioxide, as well as the main signal having a g value ranging from 2.004 to 2.007 and two subsignals having a g value ranging from 1.985 to 1.986 and a g value at 2.024 are observed in the ESR measured under the irradiation of light having a wavelength of 420 nm or more at 77 K in vacuum, and said three signals are observed in a little amount or substantially not observed in darkness at 77 K in vacuum.

Claims

1. A visible light responsive type paint comprising a binder, a visible light responsive type material and a solvent, characterized in that said visible light responsive type material comprises at least anatase type titanium dioxide, as well as the main signal having a g value ranging from 2.004 to 2.007 and two subsignals having a g value ranging from 1.985 to 1.986 and a g value at 2.024 are observed in the ESR measured under the irradiation of light having a wavelength of 420 nm or more at 77 K in vacuum, and said three signals are observed in a little amount or substantially not observed in darkness at 77 K in vacuum.

2. The paint according to claim 1, wherein said three signals are also observed in the ESR measured in darkness and under the irradiation of light having a wavelength of 420 nm or more at an ordinary temperature in vacuum.

3. The paint according to claim 1 or 2, wherein said three signals appertain to radicals attributing to hole complement.

4. The paint according to claim 1, further comprising a subsignal having a g value ranging from 2.009 to 2.010 in the ESR measured under the irradiation of light having a wavelength of 420 nm or more at 77 K in vacuum.

5. The paint according to any of claims 1 to 4, wherein said visible light responsive type material is an oxygen defect type titanium oxide.

6. The paint according to any of claims 1 to 5, wherein the binder is an organic binder or an inorganic binder.

7. The paint according to any of claims 1 to 6, wherein the solvent is water or an organic solvent.

8. The paint according to claim 6 or 7, wherein the organic binder is at least one binder selected from the group consisting of fluorine polymer, silicon polymer, acryl resin, epoxy resin, polyester resin, melamine resin, urethane resin and alkyd resin.

9. The paint according to claim 6 or 7, wherein the inorganic binder is at least one binder selected from the group consisting of alkyl silicate, products obtained by hydrolyzing hydrolyte silicon compound such as halogenated silicon and its partially hydrolyzed substance, polycondensation products of organic polysiloxane compound, silicon compound such as silica, colloidal silica, water-glass and organopolysiloxane, phosphates such as zinc phosphate and aluminum phosphate, diphosphate, cement, calcium oxide, frit for enamel, glost for glass-lining and plaster.

10. The paint according to any of claims 1 to 9, further comprising a granulate substance, an adsorption agent, a carrier and/or polyphosphate.

11. The paint according to claim 10, wherein the granulate substance is an inorganic or organic particle having a mean particle diameter ranging from 1 nm to 100 μ

m, the adsorption agent and carrier are an activated carbon, zeolite or silica gel, and the polyphosphate is at least one selected from the group consisting of sodium hexamethaphosphate, sodium tetrapolyphosphate, sodium tripolyphosphate and sodium pyrophosphate.

12. A paint comprising a binder, polyphosphate, a visible light responsive type material and a solvent, characterized in that said visible light responsive type material comprises at least anatase type titanium dioxide, as well as the main signal having a g value ranging from 2.004 to 2.007 and two subsignals having a g value ranging from 1.985 to 1.986 and a g value at 2.024 are observed in the ESR measured under the irradiation of light having a wavelength of 420 nm or more at 77 K in vacuum, and said three signals are observed in a little amount or substantially not observed in darkness at 77 K in vacuum.

13. A visible light responsive type coating film comprising a binder and a visible light responsive type material, characterized in that said visible light responsive type material comprises at least anatase type titanium dioxide, as well as the main signal having a g value ranging from 2.004 to 2.007 and two subsignals having a g value ranging from 1.985 to 1.986 and a g value at 2.024 are observed in the ESR measured under the irradiation of light having a wavelength of 420 nm or more at 77 K in vacuum, and said three signals are observed in a little amount or substantially not observed in darkness at 77 K in vacuum.

14. The coating film according to claim 13, wherein the binder is an organic binder or an inorganic binder.

15. The coating film according to claim 14, wherein the organic binder is at least one binder selected from the group consisting of fluorine polymer, silicon polymer, acryl resin, epoxy resin, polyester resin, melamine resin, urethane resin and alkyd resin.

16. The coating film according to claim 14, wherein the inorganic binder is at least one binder selected from the group consisting of alkyl silicate, products obtained by hydrolyzing hydrolyte silicon compound such as halogenated silicon and the substance partially hydrolyzed, polycondensation products of organic polysiloxane compound, silicon compound such as silica, colloidal silica, water-glass and organopolysiloxane, phosphates such as zinc phosphate and aluminum phosphate, diphosphate, cement, calcium oxide, frit for enamel, glost for glass-lining and plaster.

17. The coating film according to any of claims 13 to 16, further comprising a granulate substance, an adsorption agent, a carrier and/or polyphosphate.

18. The coating film according to claim 17, wherein the granulate substance is an inorganic or organic particle having a mean particle diameter ranging from 1 nm to 100 μ

m, the adsorption agent and carrier are an activated carbon, zeolite or silica gel, and the polyphosphate is at least one selected from the group consisting of sodium hexamethaphosphate, sodium tetrapolyphosphate, sodium tripolyphosphate and sodium pyrophosphate.

20. An article provided with the coating film according to any of claims 13 to 19 on at least a part of surface.

21. The article according to claim 20, which is an inorganic article such as ceramics and glass, an organic article such as plastics, rubber, wood and paper, or a metal article such as a metal such as aluminum and an alloy such as steel.

19. A coating film exhibiting hydrophilic property under the irradiation of light and comprising a binder, polyphosphate and a visible light responsive type material, characterized in that said visible light responsive type material comprises at least anatase type titanium dioxide, as well as the main signal having a g value ranging from 2.004 to 2.007 and two subsignals having a g value ranging from 1.985 to 1.986 and a g value at 2.024 are observed in the ESR measured under the irradiation of light having a wavelength of 420 nm or more at 77 K in vacuum, and said three signals are observed in a little amount or substantially not observed in darkness at 77 K in vacuum.