Process of adhering organic paint on glass to match automotive body color

• US 6,391,141 B2
• Filed: 02/21/2001
• Issued: 05/21/2002
• Est. Priority Date: 07/06/1998
• Status: Expired due to Fees

• Current Assignee: Automotive Components Holdings LLC (Ford Motor Company)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Boaz, Premakaran Tucker
• Primary Examiner(s): DIXON, MERRICK L
• Application Number:
  US09/790,223
• Publication Number:
  US 20010019772A1
• Time in Patent Office: 454 Days
• Field of Search: 156/329, 156/330, 156/331.7, 156/272.2, 156/273.3, 156/275.5, 156/306.9, 156/307.1, 156/307.7, 156/310, 428/426
• US Class Current: 156/275.5
• CPC Class Codes: C03C 17/42 at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: C03C 2217/45 Inorganic continuous phases
• CPC Class Codes: C03C 2217/475 Inorganic materials
• CPC Class Codes: Y10T 428/264 Up to 3 mils
• CPC Class Codes: Y10T 428/29 Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
• CPC Class Codes: Y10T 428/31612 As silicone, silane or siloxane
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer

Abstract

A process for adhering a layer of organic paint to the surface of a glass sheet, and the products produced thereby. The process comprises applying a layer of a water-based silicate paint to the surface of the glass sheet, heating to cure the paint, forming the glass sheet into a shape, sensitizing the water based paint with a layer of silane material, applying a layer of organic paint over the layer of sensitized water-based silicate paint, and curing the organic paint to provide organic paint adhered to the glass surface.

Claims

1. A process for adhering a layer of organic paint to a surface of an automotive glass sheet, the process comprising the steps of:

A) applying, to at least a portion of said surface of a glass sheet a layer of water-based paint, the composition of said water-based paint, comprising;

(i) water-soluble sodium silicate forming 20 to 45 weight percent of said composition,

(ii) water forming 5 to 25 weight percent of said composition;

(iii) water-soluble base in an amount sufficient to provide said composition with a pH of at least 10.5;

(iv) finely divided metal oxide powder selected from the group consisting of oxides of copper, iron, nickel, cobalt and mixtures thereof forming 20 to 45 weight percent of said composition and having a particle size, on average, less than 7 microns;

(v) particles of soda-lime-silica glass forming 3 to 55 weight percent of said composition and having a diameter, on average, less than 20 microns and having a melting point of at least 1700°

F.; and

at least one material selected from the group consisting of;

(vi) low-melting glass frit powder melting below 1300°

F. forming up to 20 weight percent of said composition and having a particle size, on average, less than 10 microns;

(vii) zinc oxide forming up to 10 weight percent of said composition;

B) heating said surface of a glass sheet to cure said water-based paint;

C) forming said glass sheet coated with said water-based paint into a shape;

D) applying a layer of sensitizing material comprising saline over said layer of said water-based paint on said surface of the glass;

E) applying a layer of organic paint over said coating of water-based said sensitizing material ; and

F) curing said layer of organic paint such that said organic paint is bonded to said surface of a glass sheet.

2. The process according to claim 1, wherein the forming step comprises the process of press bending.

3. The process according to claim 1, wherein the forming step comprises at least one process selected from the group consisting of gas hearth forming, sag forming or quick sag forming.

4. The process according to claim 1, wherein said composition of said water-based paint further comprises potassium silicate.

5. The process according to claim 1, wherein said composition of said water-based paint further comprises aluminum hydroxide.

6. The process according to claim 1, wherein the organic paint is selected from said group consisting of urethanes, enamels, acrylic, epoxy-based paints, and lacquers.

7. The process according to claim 1, wherein said low-melting glass frit is a metal silicate wherein said metal is selected from the group consisting of zinc, boron, bismuth, titanium, zirconium, and aluminum and mixtures thereof.

8. The process according to claim 1, wherein said sensitizing materials are organosilane materials.

9. The process according to claim 1 wherein said sensitizing material is provided as a solution thereof in a solvent wherein before applying said layer of organic paint comprises the step of drying said layer of sensitizing material to remove said solvent.

10. The process according to claim 1 wherein said sensitizing material is provided as a solution thereof in a solvent wherein before applying said layer of organic paint comprises the step of drying said layer of sensitizing material to remove said solvent.

11. A process for adhering a layer of organic paint to a surface of a substarte, the process comprising the steps of:

A) applying, to said surface a layer of water-based paint, the composition of said water-based paint, comprising;

(i) water-soluble sodium silicate forming 20 to 45 weight percent of said composition,

(ii) water forming 5 to 25 weight percent of said composition;

(iii) water-soluble base in an amount sufficient to provide said composition with a pH of at least 10.5;

(iv) finely divided metal oxide powder selected from the group consisting of oxides of copper, iron, nickel, cobalt and mixtures thereof forming 20 to 45 weight percent of said composition and having a particle size, on average, less than 7 microns;

(v) particles of soda-lime-silica glass forming 3 to 55 weight percent of said composition and having a diameter, on average, less than 20 microns and having a melting point of at least 1700°

F.; and

at least one material selected from the group consisting of;

(vi) low-melting glass frit powder melting below 1300°

F. forming up to 20 weight percent of said composition and having a particle size, on average, less than 10 microns;

(vii) zinc oxide forming up to 10 weight percent of said composition;

B) heating said surface to cure said water-based paint;

C) forming said substrate coated with said water-based paint into a shape;

D) applying a layer of sensitizing material comprising saline over said layer of said water-based paint on said surface of the substrate; and

E) applying a layer of organic paint over said layer of said sensitizing material.

12. The process according to claim 11, further comprising the step of curing said layer of organic paint such said organic paint is bonded to said surface of said substrate.

13. The process according to claim 11, wherein the thickness of said layer of the water-based paint on said surface is in the range of 12 to 16 microns.

14. The process according to claim 11, wherein the forming step comprises at least one process selected from the group consisting of gas hearth forming, sag forming, quick sa g forming or press forming.

15. The process according to claim 11, wherein said composition of said water-based paint further comprises potassium silicate.

16. The process according to claim 11, wherein said composition of said water-based paint further comprises aluminum hydroxide.

17. The process according to claim 11, wherein said organic paint is selected from the group consisting of urethanes, enamels, acrylic, epoxy-based paints, and lacquers.

18. The process according to claim 11, wherein said low-melting glass frit is a metal silicate wherein said metal is selected from the group consisting of zinc, boron, bismuth, zirconium, and aluminum and mixtures thereof.

19. The process according to claim 11, wherein said sensitizing materials are organsilane materials.