Automotive glazing with anti-fingerprint coating

Patent metadata

Field	Value
Publication number	US-12187019-B2
Application number	US-202017774334-A
Country	US
Kind code	B2
Filing date	Nov 5, 2020
Priority date	Nov 5, 2019
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

Due to the increased glazed area of modern vehicles, especially the large panoramic glass roofs, we have seen a substantial growth in the use of anti-reflective coatings. Unfortunately, these types of coatings accentuate fingerprints and smudges. The invention provides an automotive glazing which is substantially resistant to fingerprints, and a method of manufacture thereof through the application of an anti-fingerprint coating based on low surface energy silanes.

First claim

What is claimed is:

1. An automotive roof glazing with a total visible light transmission of less than 20%, comprising:
at least one glass layer having two oppositely disposed major faces, wherein one of these two major faces is an interior face which comprises a portion of the interior surface of a vehicle cabin when installed as a window in a vehicle; and
an anti-reflective coating applied on the interior face of said at least one glass layer; and
an anti-fingerprint coating applied on the interior face of said at least one glass layer disposed over the anti-reflective coating;
wherein the anti-fingerprint coating is a low surface-energy silane-based coating.

2. The automotive roof glazing of claim 1 , wherein the glazing is a monolithic tempered glazing.

3. The automotive roof glazing of claim 1 , wherein the glazing is a laminated glazing.

4. The automotive roof glazing of claim 1 , wherein said at least one glass layer is at least two glass layers, outer glass layer and inner glass layer; wherein the anti-reflective coating is applied on the interior face of the inner glass layer; and wherein the automotive roof glazing further comprises a plastic bonding layer placed between the outer and inner glass layers.

5. The automotive roof glazing of claim 4 , wherein the thickness of the inner glass layer is less than 1.0 mm.

6. The automotive roof glazing of claim 4 , wherein the inner glass layer is cold bent.

7. The automotive roof glazing of claim 1 , wherein the total visible light transmission is less than 10%.

8. The automotive roof glazing of claim 1 , wherein the total visible light reflection is less than 2%.

9. The automotive roof glazing of claim 1 , wherein the total visible light reflection is less than 1%.

10. A method for producing an automotive roof glazing with a total visible light transmission of less than 20% comprised of a least one glass layer having two oppositely disposed major faces, wherein one of these two major faces is an interior face which comprises a portion of the interior surface of a vehicle cabin when installed as a window in a vehicle; an anti-reflective coating applied on the interior face of said at least one glass layer; and an anti-fingerprint coating disposed over the anti-reflective coating, the method comprising the steps of:
cleaning the interior face of said at least one glass layer having the anti-reflective coating such that substantially all contaminates, debris and other undesirable elements are removed from said face;
subjecting the interior face of said at least one glass layer having the anti-reflecting coating to a plasma surface activation treatment;
applying a low surface-energy silane-based anti-fingerprint coating on at least a portion of the interior face of said at least one glass layer having the anti-reflective coating; and
heating said at least one glass layer having the anti-reflective coating to a temperature range and for a duration sufficient to cure the anti-fingerprint coating.

11. The method of claim 10 , wherein the method is integrated as an in-line part of the glass bending process.

12. The method of claim 10 , wherein the step of applying a low surface-energy silane-based anti-fingerprint coating comprises atomizing a solution of low surface-energy silanes via spray means.

13. The method of claim 10 , wherein in the step of heating, the temperature range is from 50° C. to 150° C. for a period from 10 minutes to 12 hours.

14. The method of claim 10 , wherein the step of applying a low surface-energy silane-based anti-fingerprint coating is carried out after bending said at least one glass layer having the anti-reflective coating.

15. The method of claim 10 , wherein the step of applying a low surface-energy silane-based anti-fingerprint coating is carried out before a cold bending process applied to said at least one glass layer having the anti-reflective coating.

Assignees

• Agp America Sa

Inventors

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

Classifications

• B32B2307/7376

  Thickness · CPC title

• B60J1/001

  Double glazing for vehicles · CPC title

• B32B2605/006

  Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings · CPC title

• B32B2383/00

  Polysiloxanes · CPC title

• B32B2309/025

  Temperature vs time profiles · CPC title