Coatings on glass

• US 5,757,564 A
• Filed: 01/09/1995
• Issued: 05/26/1998
• Est. Priority Date: 01/10/1994
• Status: Expired due to Fees

• Current Assignee: Pilkington NA, Pilkington PLC
• Original Assignee: Pilkington NA, Pilkington PLC
• Inventors: Jenkinson, Timothy, Reilly, Steven John, Cross, Raymond Peter
• Primary Examiner(s): Shafer, Ricky D.
• Application Number:
  US08/370,412
• Time in Patent Office: 1,233 Days
• Field of Search: 359/584, 359/585, 359/603, 359/870, 359/883, 359/884, 359/871
• US Class Current: 359/870
• CPC Class Codes: C03C 17/3482 comprising silicon, hydrogenated silicon or a silicide
• CPC Class Codes: C03C 17/38 at least one coating being a coating of an organic material
• CPC Class Codes: C03C 17/42 at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: G02B 1/105 Protective coatings
• CPC Class Codes: G02B 1/14 Protective coatings, e.g. hard coatings
• CPC Class Codes: G02B 5/0833 comprising inorganic materials only

Abstract

A mirror assembly comprising a glass substrate, a low transmissivity reflecting coating on the substrate and an opacifying member which is assembled adjacent to the glass substrate for a front surface mirror or the reflecting coating for a back surface mirror. The present invention also provides a method of producing a mirror assembly comprising depositing onto a hot ribbon of glass during the production process a low transmissivity reflecting coating and assembling an opacifying member adjacent to the glass substrate or the reflecting coating of the mirror so formed.

Claims

1. A front surface mirror assembly comprising a glass substrate, a low transmissivity reflecting coating on the substrate and an opacifying member which is assembled adjacent to the glass substrate, the opacifying member comprising a self-adhesive plastics film which comprises a polyethylene or polypropylene film carrying a layer of a pressure-sensitive acrylic adhesive, and the opacifying member further comprising a woven polyolefin scrim layer which is adhered to the back surface of the plastics film.

2. A front surface mirror assembly according to claim 1 further comprising a primer which assists the adhesion of the self-adhesive film to the underlying surface.

3. A front surface mirror assembly according to claim 2 wherein the primer comprises an organosilane.

4. A front surface mirror assembly according to claim 3 wherein the primer comprises aminopropyltrimethoxysilane in aqueous solution.

5. A front surface mirror assembly according to claim 1 wherein the polyethylene film is around 160 microns thick.

6. A front surface mirror assembly according to claim 1 wherein the polypropylene film is around 90 microns thick.

7. A front surface mirror assembly according to claim 1 wherein the reflecting coating comprises a reflecting layer and at least two reflection enhancing layers whereby the mirror has a visible light reflection of at least 70%.

8. A front surface mirror assembly according to claim 7 wherein the outer surface of the reflecting coating comprises silicon.

9. A front surface mirror assembly according to claim 1 wherein the reflecting coating has a transmissivity of from 1 to 15% in visible light.