Automotive glazing with enamel patterns

Patent metadata

Field	Value
Publication number	US-2016185656-A1
Application number	US-201214238676-A
Country	US
Kind code	A1
Filing date	Jul 3, 2012
Priority date	Aug 12, 2011
Publication date	Jun 30, 2016
Grant date	—

Abstract

The invention concerns automobile glazing comprising an enamel coating on at least part of the surface thereof, said coating acting as a barrier against light transmission. The glazing is characterised in that the enamel coating reflects more than 10%, and preferably more than 15%, of wavelengths higher than 800 nm.

First claim

1 . An automotive glazing, comprising: an enamel coating on at least one section of a surface of the glazing as a barrier to light transmission,
wherein the enamel coating exhibits a reflection of wavelengths of more than 800 nm of not less than 10%.

2 . The glazing according to claim 1 , wherein the light transmission of the section coated with the enamel coating is less than 1%.

3 . The glazing according to claim 1 , wherein an infrared reflection of the enamel coating does not exceed 30%.

4 . The glazing according to claim 1 , wherein the section coated with the enamel coating is as least localised to a periphery of the glazing.

5 . The glazing according to claim 1 , wherein the section coated with the enamel coating exhibits a reflection rate in a visible range Renamel that does not exceed 25%.

6 . The glazing according to claim 5 , wherein a difference between reflection rates in the visible range Renamel and Rglass does not exceed 10%.

7 . A bending process, comprising: subjecting at least one glass sheet comprising a section coated with an enamel coating as a barrier to light transmission to a bending operation,
wherein the enamel coating exhibits a reflection of wavelengths of more than 800 nm of not less than 10%.

8 . The process according to claim 7 , wherein
the bending operation is conducted at least in part by gravity, the glass sheet coated with the enamel coating are supported by a support on periphery of the glass sheet during the bending operation, and the support is located under the section coated with the enamel coating.

9 . The process according to claim 8 , wherein during the bending operation, a difference between the highest temperature of the section coated with the enamel coating Tenamel and the highest temperature of section not coated with the enamel coating Tglass does not exceed 30° C.

10 . The process according to claim 7 , wherein
a top glass sheet and a bottom glass sheet arranged one on top of the other are bent simultaneously, and the top glass sheet alone bears an enamelled section on a surface that is not in contact with the bottom glass sheet.

11 . The glazing according to claim 1 , wherein the enamel coating exhibits a reflection of wavelengths of more than 800 nm of not less than 15%.

12 . The glazing according to claim 1 , wherein the light transmission of the section coated with the enamel coating is less than 0.1%.

13 . The glazing according to claim 1 , wherein the section coated with the enamel coating exhibits a reflection rate in a visible range Renamel that does not exceed 20%.

14 . The glazing according to claim 5 , wherein a difference between reflection rates in the visible range Renamel and Rglass does not exceed 5%.

15 . The process according to claim 8 , wherein during the bending operation, a difference between the highest temperature of the section coated with the enamel coating Tenamel and the highest temperature of section not coated with the enamel coating Tglass does not exceed 20° C.

Assignees

• Danneels Sophie
• Descamps Fabien
• Agc Glass Europe

Inventors

• Danneels Sophie
• Descamps Fabien

Classifications

• C03B23/023

  by bending · CPC title

• C03B23/0252

  by gravity only, e.g. sagging (C03B23/035 takes precedence) · CPC title

• C03C17/04 Primary

  by fritting glass powder · CPC title

• B32B17/10348

  comprising an obscuration band · CPC title

• C03C8/02

  Frit compositions, i.e. in a powdered or comminuted form · CPC title