Mirror using transparent synthetic resin plate

• US 4,666,264 A
• Filed: 06/11/1985
• Issued: 05/19/1987
• Est. Priority Date: 06/11/1985
• Status: Expired due to Fees

• Current Assignee: Maruei Industries Company Limited
• Original Assignee: Maruei Industries Company Limited
• Inventors: Yamabe, Taiji
• Primary Examiner(s): Petrakes, John
• Application Number:
  US06/743,361
• Time in Patent Office: 707 Days
• Field of Search: 350/641, 350/631, 350/278-281, 428/425.5, 428/447, 428/448, 428/450, 428/457, 428/458, 428/912.2
• US Class Current: 359/883
• CPC Class Codes: B60R 1/02 Rear-view mirror arrangements periscope arrangements B60R1/10
• CPC Class Codes: G02B 5/0808 having a single reflecting layer G02B5/0883, G02B5/0891 take precedence
• CPC Class Codes: G02B 5/0866 incorporating one or more organic, e.g. polymeric layers
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

A mirror comprising:

a transparent plate of a synthetic resin;

a surface-hardening layer (a) coated on an entire surface of the resin plate;

a reflective metal layer (b) deposited on the layer (a) of the back of resin, and

a back-coat layer (c) closely covering the surface of the reflective film, characterized in that said metal layer is formed by a dry metal plating, said metal being selected from the group consisting of tin or alloy of tin and copper (Sn:Cu=1:less than 0.4 by weight), thickness of layer (b) being in the range of 700-1600 Å and moisture permeability of layer (a) being smaller than those of layer (b) and layer (c) is disclosed.

Claims

1. A mirror comprising:

a transparent plate of synthetic resin;

a surface-hardening layer coated on all surfaces of the resin plate;

a reflective metal layer deposited on the surface-hardening layer of one side of the resin plate, and

a back-coat layer closely covering the surface of the reflective metal layer,

wherein said metal layer is formed by a dry metal plating, said metal being selected from the group consisting of tin and an alloy of tin and copper (Sn;

Cu=1;

less than 0.4 by weight), the thickness of said reflective metal layer being in the range of 700-1600 Å and

the moisture permeability of said surface-hardening layer being substantially smaller than those of said reflective metal layer and said back-coat layer.

2. The mirror of claim 1 wherein said metal is tin.

3. The mirror of claim 1 wherein said metal is an alloy of tin and copper (Sn:

Cu=1;

less than 0.4).

4. The mirror of claim 1 wherein said dry metal plating is vacuum metallizing, sputtering or ion plating.

5. The mirror of claim 1 wherein said synthetic resin is polymethyl methacrylate.

6. The mirror of claim 1 wherein said surface hardening layer is formed essentially of an organosilicone polymer.

7. The mirror of claim 1 wherein the front and back surfaces of the resin plate are both flat and are not parallel to each other.