Mirror

• US 8,545,031 B2
• Filed: 08/10/2009
• Issued: 10/01/2013
• Est. Priority Date: 08/11/2008
• Status: Active Grant

• Current Assignee: AGC Glass Europe SA (AGC, Inc.)
• Original Assignee: AGC Glass Europe SA (AGC, Inc.)
• Inventors: Ventelon, Lionel, Bouesnard, Olivier, Cosijns, Bruno
• Primary Examiner(s): Shafer, Ricky D
• Application Number:
  US13/058,116
• Publication Number:
  US 20110267713A1
• Time in Patent Office: 1,513 Days
• Field of Search: 359/838, 359/883, 359/884, 359/900
• US Class Current: 359/883
• CPC Class Codes: F24S 23/82 characterised by the material or the construction of the reflector
• CPC Class Codes: G02B 5/0808 having a single reflecting layer G02B5/0883, G02B5/0891 take precedence
• CPC Class Codes: Y02E 10/40 Solar thermal energy, e.g. solar towers

Abstract

Mirror consisting of a glass substrate having a front surface and a rear surface, the rear surface carrying, in order, a silver coating layer and at least one base paint layer. The glass substrate, the silver coating layer, and the at least one base paint layer each have an edge portion having a rear facing surface arranged at an acute angle to the front surface of the mirror. An additional paint layer covers the entire surface of the base paint layer and the rear facing surfaces of the glass substrate and the silver coating layer.

Claims

1. A method for manufacturing a mirror, the method comprising in the following sequence:

a) forming a silver coating layer on a glass substrate;

b) applying at least one base paint layer over the silver coating layer;

c) edge-working simultaneously the glass substrate, the silver coating layer, and the at least one base paint layer;

d) applying by curtain coating an additional paint layer covering substantially a whole surface of the at least one base paint layer and at least a portion of the glass substrate which has been edge-worked,

wherein the edge-working is made on at least three sides of the mirror; and

wherein the mirror has an average edge corrosion of less than 300 μ

m after having been subjected to a 45 days CASS test.

2. The method according to claim 1, wherein the edge-working is made by grinding, beveling, or chamfering.

3. The method according to claim 1, wherein the edge-working is made along substantially the entire periphery of the mirror.

4. The method according to claim 1, wherein the mirror is free of a copper layer.

5. The method according to claim 1, further comprising contacting the glass substrate with an activating solution before forming the silver coating layer.

6. The method according to claim 1, further comprising contacting the silver coating layer with a passivating solution before applying the at least one base paint layer.

7. The method according to claim 1, wherein the edgeworking comprises chamfering.

8. The method according to claim 1, wherein the edgeworking comprises beveling.

9. The method according to claim 1, wherein the edgeworking comprises providing a circular profile to the edge of the mirror.

10. The method according to claim 1, wherein the mirror has an average edge corrosion of less than 80 μ

m after having been subjected to a 5 days CASS test.

11. The method according to claim 1, wherein the mirror has an average edge corrosion of less than 280 μ

m after having been subjected to the 45 days CASS test.

12. The method according to claim 1, further comprising

contacting the glass substrate with an activating solution comprising tin and palladium before forming the silver coating layer;

and

contacting the silver coating layer with a passivating solution comprising tin before applying the at least one base paint layer.

13. The method according to claim 1, wherein the glass substrate has four sides and corrosion resistance is similar at each of the substrate'"'"'s sides.