Composite material

• US 20030186089A1
• Filed: 12/23/2002
• Published: 10/02/2003
• Est. Priority Date: 03/27/2002
• Status: Abandoned Application

• Current Assignee: Murakami Corporation
• Original Assignee: Murakami Corporation
• Inventors: Komatsu, Toru, Kobayashi, Masaki, Kikuchi, Hideyuki
• Application Number:
  US10/325,968
• Publication Number:
  US 20030186089A1
• Time in Patent Office: Days
• US Class Current: 428/701
• CPC Class Codes: B01J 21/063 Titanium; Oxides or hydroxides thereof
• CPC Class Codes: B01J 35/39 Photocatalytic properties
• CPC Class Codes: B01J 37/0238 via the gaseous phase-sublimation
• CPC Class Codes: B01J 37/0244 Coatings comprising several layers
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 2217/71 Photocatalytic coatings
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Abstract

A composite material having a laminated film is disclosed in which between two or more photocatalyst layers each possessing a light permeability an a photocatalytic reactivity middle layers composed of a light permeable material having a reflectance different from that of the photocatalyst layers are interposed, laminated on a base material surface.

Claims

1. A composite material having a laminated film in which between two or more photocatalyst layers each possessing a light permeability and an a photocatalytic reactivity, middle layers composed of a light permeable material having a reflectance different from that of the photocatalyst layers are interposed, provided on the surface of a substrate.

2. The composite material as claimed in claim 1, wherein the thickness of each photocatalyst film is from 5 nm to 50 nm.

3. The composite material as claimed in claim 1, wherein the thickness of a single or multiple middle layers is from 5 nm to 50 nm.

4. The composite material as claimed in claim 1, wherein said photocatalyst film is composed of TiO₂, SrTiO₃, or WO₃.

5. The composite material as claimed in claim 1, wherein said middle layer is composed of an oxide.

6. The composite material as claimed in claim 1, wherein said middle layers are composed of either of SiO₂, WO₃, Al₂O₃, and ITO.

7. The composite material as claimed in claim 1, wherein said laminated film has a hydrophilic film having an optical permeability structured with different materials from the photocatalyst film of said uppermost layer provided on said photocatalyst film, and said hydrophilic film constitutes the outermost surface of the laminated film so as to be exposed to an open air.

8. The composite material as claimed in claim 1, wherein a photocatalyst film which constitutes an uppermost surface of said multiple layers constitutes the outermost surface of said laminated film so as to be exposed to an open air.

9. The composite material as claimed in claim 1, wherein an outermost surface of said laminated film is formed in a state of porosity.

10. The composite material as claimed in claim 17, 8 or 9, wherein said substrate comprises a transparent substrate.

11. The composite material as claimed in claim 10, wherein a reflectance film is formed on a backside surface of said transparent film to make up a mirror.

12. The composite material as claimed in claim 10, wherein a second substrate is arranged in an opposing manner, and a substance exhibiting electrochromic phenomenon is interposed therebetween to make up an EC element.

13. The composite material as claimed in claim 12, wherein said second substrate is a transparent substrate, and a reflective film is formed on the external surface side of this second substrate to make up an EC mirror.

14. The composite material as claimed in claim 12, wherein an electrode-cum-reflective film is formed in the inside of said second substrate to make up an EC mirror.

15. The composite material as claimed in claim 11, which is constituted as a mirror main part of the exterior mirror for a vehicle.

16. The composite material as claimed in claim 13, which is constituted as a mirror main part of the exterior mirror for a vehicle.

17. The composite material as claimed in claim 14, which is constituted as a mirror main part of the exterior mirror for a vehicle.