Composite material

• US 6,908,698 B2
• Filed: 03/10/2003
• Issued: 06/21/2005
• Est. Priority Date: 04/05/2002
• Status: Expired due to Fees

• Current Assignee: Murakami Corporation
• Original Assignee: Murakami Corporation
• Inventors: Kobayashi, Masaki, Yoshida, Masaki, Kikuchi, Hideyuki
• Primary Examiner(s): Jones, Deborah
• Assistant Examiner(s): BLACKWELL, GWENDOLYN
• Application Number:
  US10/383,638
• Publication Number:
  US 20030215647A1
• Time in Patent Office: 834 Days
• Field of Search: 428/697, 428/699, 428/701, 428/702, 428/446, 428/448, 428/428, 428/432, 428/409, 502/302, 502/349, 502/350
• US Class Current: 428/697
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10321 Laminated safety glass or glazing containing liquid layers
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 2217/71 Photocatalytic coatings
• CPC Class Codes: G02B 1/18 Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films G02B1/16 takes precedence
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G02F 2001/1536 additional, e.g. protective, layer inside the cell
• CPC Class Codes: Y10T 428/31 Surface property or characteristic of web, sheet or block

Abstract

In a composite material having a construction that on the surface of a substrate is formed a primer layer having an appropriate function, and a photocatalyst layer is laminated on the primer layer, decreasing of the durability of the film due to the existence of the primer layer is prevented. Primer layer 14, photocatalyst layer 16, and hydrophilic layer 18 are laminated on one surface of transparent glass substrate 12 in this order. Primer layer 18, which makes up for suppressing sodium dispersion, is composed of a mixture or double oxide comprising an inorganic oxide such as SiO₂ and Al₂O₃, and lanthanoide oxide such as La, Ce, and Pr, or of Ta₂O₅ or ZrO₂. Photocatalyst layer 16 comprises, e.g., the photocatalyst, TiO₂. Hydrophilic layer 18 comprises, e.g., porous SiO₂.

Claims

1. A composite material formed on a substrate, comprising:

a primer layer provided on said substrate and comprising a double oxide comprising Al₂O₃ and one of La₂O₃ and Pr₂O₃; and

a photocatalyst layer provided on said primer layer,

wherein said primer layer is adjusted such that said primer layer has a refraction index between refraction indexes of said substrate and photocatalyst layer.

3. The composite material as claimed in claim 1, wherein said photocatalyst layer comprises TiO₂.

5. The composite material as claimed in claim 1, further comprising a hydrophilic layer laminated on said photocatalyst layer.

7. The composite material as claimed in claim 5, wherein said hydrophilic layer comprises porous SiO₂.

9. The composite material as claimed in claim 1, wherein said substrate comprises a glass.

10. The composite material as claimed in any one of claims 1 and 2, wherein said substrate comprises a transparent substrate, and said composite material is configured to be transparent throughout the front surface to the back surface.

11. The composite material as claimed in claim 10, further comprising a reflecting film formed on said transparent substrate to make up a mirror.

12. The composite material as claimed in any one of claims 1 and 2, further comprising a reflecting film formed between said substrate and said primer layer to make up a mirror.

13. The composite material as claimed in claim 12, wherein said primer layer makes up a layer for controlling reflectance characteristics, which controls the surface reflectance characteristics of the composite material.

14. The composite material as claimed in claim 10, further comprising a second substrate placed on the back surface side of the transparent substrate in an opposite manner, and a substance expressing an electroebromic phenomenon incorporated between these two substrates to make up an EC element.

15. The composite material as claimed in claim 14, wherein said second substrate is a transparent substrate, and a reflecting film is formed on the outer surface of said second substrate to make up an EC mirror.

16. The composite material as claimed in claim 14, further comprising an electrode/reflecting film formed on the inner surface of said second substrate to make up an EC mirror.

17. The composite material as claimed in claim 11, which is constituted as a mirror body for automobile exterior mirror.

18. The composite material as claimed in claim 12, which is constituted as a mirror body for automobile exterior mirror.

19. The composite material as claimed in claim 13, which is constituted as a mirror body for automobile exterior mirror.

20. The composite material as claimed in claim 15, which is constituted as a mirror body for automobile exterior mirror.

21. The composite material as claimed in claim 16, which is constituted as a mirror body for automobile exterior mirror.

2. A composite material formed on a substrate, comprising:

a primer layer provided on said substrate and comprising a double oxide comprising Ta₂O₃ and Al₂O₃; and

a photocatalyst layer provided on said primer layer,

wherein said primer layer is adjusted such that said primer layer has a refraction index between refraction indexes of said substrate and photocatalyst layer.

4. The composite material as claimed in claim 2, wherein said photocatalyst layer comprises TiO₂.

6. The composite material as claimed in claim 2, further comprising a hydrophilic layer laminated on said photocatalyst layer.

8. The composite material as claimed in claim 6, wherein said hydrophilic layer comprises porous SiO₂.

22. The composite material as claimed in claim 2, wherein said substrate comprises a glass.