Laminate with low-e coating on thin chemically strengthened glass and method of manufacture

Patent metadata

Field	Value
Publication number	US-2022388282-A1
Application number	US-202017774472-A
Country	US
Kind code	A1
Filing date	Nov 5, 2020
Priority date	Nov 5, 2019
Publication date	Dec 8, 2022
Grant date	—

Abstract

An automotive laminated glazing is provided, comprising an outer glass layer and an inner glass layer, said outer glass layer having a first surface and a second surface and said inner glass layer having a third surface and a fourth surface, wherein the inner glass layer has a thickness of not more than 1.0 mm and is chemically strengthened, and wherein the fourth surface features a low-e coating, obtainable by chemically strengthening a flat glass pane having a thickness of not more than 1.0 mm, then applying the low-e coating, and finally laminating the flat glass pane to a curved glass pane forming the outer layer, thereby cold bending said flat glass pane.

First claim

What is claimed is:

1 . An automotive laminated glazing comprising:
a curved outer glass layer having two oppositely disposed major surfaces, a first surface and a second surface; an inner glass layer having two oppositely disposed major surfaces, a third surface and a fourth surface; wherein the inner glass layer is a chemically strengthened glass layer having no more than 1.0 mm in thickness; a low-e coating applied on the fourth surface of the inner glass layer; and at least one plastic bonding layer disposed between second and third surfaces; wherein the inner glass layer adopts the shape of the outer glass layer when joined together.

2 . The automotive laminated glazing of claim 1 , wherein the low-e coating is comprised of a three-layer MSVD deposited stack comprising SiNx/ITO/SiNx.

3 . The automotive laminated glazing of claim 1 , wherein the low-e coating is comprised of a three-layer MSVD deposited stack comprising SiOxNy/ITO/SiOxNy.

4 . The automotive laminated glazing of claim 1 further comprising an anti-reflective coating applied over the low-e coating.

5 . The automotive laminated glazing of claim 4 , wherein the anti-reflective coating comprises a two-layer MSVD coating, a first layer having a low refractive index and a second layer having a high refractive index.

6 . The method of claim 4 , wherein the anti-reflective coating comprises a three-layer MSVD coating, a first layer having a low refractive index, a second layer having a high refractive index, and a third layer having a medium refractive index.

7 . The method of claim 4 , wherein the anti-reflective coating comprises a four-layer MSVD coating, a first and a third having a low refractive index and a second and a fourth layers having a high refractive index.

8 . The automotive laminated glazing of claim 1 further comprising an anti-fingerprint coating applied to the interior facing surface.

9 . The automotive laminated glazing of claim 4 further comprising an anti-fingerprint coating applied over the anti-reflective coating.

10 . The automotive laminated glazing of claim 1 further comprising an infra-red reflecting coating applied on the second surface of the outer glass layer.

11 . The automotive laminated glazing of claim 1 further comprising an infra-red reflecting film to the laminate.

12 . A method for producing an automotive laminate comprising at least two glass layers, the method comprising the steps of:
providing a curved outer glass layer having two oppositely disposed major surfaces, a first surface and a second surface; providing an inner glass layer having two oppositely disposed major surfaces, a third surface and a fourth surface, wherein:
i. said layer is of a thickness that it less than or equal to 1.0 mm,
ii. the fourth surface comprises an interior surface of the passenger compartment of the vehicle when installed as a window in a vehicle;
said inner glass layer is cut, edged, cleaned, and otherwise prepared as needed for ion exchange chemical strengthening; said inner glass layer is chemically strengthened by an ion exchange process; said inner glass layer is coated with a low-e coating on the fourth surface comprising an interior surface of the passenger compartment of the vehicle; providing at least one plastic bonding layer disposed between second and third surfaces; said strengthened coated inner glass layer is cold bent to adopt the shape of the outer glass layer during the lamination process.

13 . The method of claim 12 comprising the additional step of thermal activation of the coating.

14 . The method of claim 12 further comprising the additional step of applying an anti-reflective coating over the low-e coating.

15 . The method of claim 12 further comprising an anti-fingerprint coating applied to the interior facing surface.

16 . The method of claim 12 comprising the additional step of adding an infra-red reflecting film to the laminate.

Assignees

• Agp America Sa

Inventors

• Mannheim Astete Mario Arturo
• Wang Zhaoyu
• Nuñez-Regueiro José
• Cornejo Iván
• Michetti Massimo
• De Oliveira Allan
• Temoche Eduardo D

Classifications

• B32B2255/28

  Multiple coating on one surface · CPC title

• B32B2398/00

  Unspecified macromolecular compounds · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title

• B32B1/00

  Layered products having a non-planar shape · CPC title

• B32B17/10981

  Pre-treatment of the layers · CPC title