Carbon based soil resistant coatings for glass surfaces

• US 20050106397A1
• Filed: 01/02/2004
• Published: 05/19/2005
• Est. Priority Date: 05/18/1999
• Status: Abandoned Application

• Current Assignee: Cardinal CG Company (Cardinal Glass Industries Incorporated)
• Original Assignee: Cardinal CG Company (Cardinal Glass Industries Incorporated)
• Inventors: Bond, Robert B., Krisko, Annette J., Pfaff, Gary L., Stanek, Roger P.
• Application Number:
  US10/751,335
• Publication Number:
  US 20050106397A1
• Time in Patent Office: Days
• US Class Current: 428/432
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/1033 Laminated safety glass or glazing containing temporary protective coatings or layers
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: C03C 17/22 with other inorganic material C03C17/34, C03C17/44 take precedence
• CPC Class Codes: C03C 17/3441 comprising carbon, a carbide or oxycarbide
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3634 one layer at least containing carbon, a carbide or oxycarbide
• CPC Class Codes: C03C 17/3655 the multilayer coating containing at least one conducting layer
• CPC Class Codes: C03C 2217/282 Carbides, silicides
• CPC Class Codes: C03C 2217/75 Hydrophilic and oleophilic coatings
• CPC Class Codes: C03C 2218/155 by reactive sputtering
• CPC Class Codes: C03C 2218/156 by magnetron sputtering
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

The present invention provides a coating for glass substrates and the like which resists accumulation of dirt and water stains. Coated glass substrates of the invention can be used in insulated glass units wherein the coating of the invention is carried on an exterior surface of one pane of glass while a reflective coating is applied on the opposite side of the same pane of glass.

Claims

1. A coated glass article having an exterior face exposed to periodic contact with water and an inner face, the exterior face bearing an external water-sheeting coating thereon, the coating being formed of a carbon layer sputtered directly onto the exterior face at a thickness of 50-100 angstroms, the coating reducing the contact angle of water on the coated exterior face of the glass to below about 25 degrees and causing water applied to the coated exterior of the glass to sheet.

2. The coated glass articles of claim 1 wherein the thickness of the carbon layer is 15-40 angstroms.

3. The coated glass article of claim 1 wherein the water-sheeting coating comprises a non-hydrogenated carbon.

4. The coated glass article of claim 1 further comprising a reflective coating carried on the inner face of the glass, the reflective coating comprising a metal layer carried between said inner face and a dielectric layer.

5. The coated glass article of claim 4 wherein the reflective coating is an infrared reflective coating including an inner dielectric layer between the metal layer and the inner face.

6. The coated glass article of claim 1 wherein the carbon layer is a graphite carbon layer.

7. A coated substrate having an exterior face exposed to periodic contact with water and an inner face, the exterior face bearing an external water-sheeting coating thereon, the coating being formed of a transparent base layer applied directly onto the exterior face and a carbon layer consisting essentially of graphite sputtered onto the transparent base at a thickness of 50-100 angstroms, the coating reducing the contact angle of water on the coated exterior face of the substrate to below about 25 degrees and causing water applied to the coated exterior of the substrate to sheet.

8. The coated glass articles of claim 7 wherein the thickness of the carbon layer is 15-40 angstroms.

9. The coated glass article of claim 7 wherein the water-sheeting coating comprises a non-hydrogenated carbon.

10. The coated glass article of claim 7 further comprising a reflective coating carried on the inner face of the glass, the reflective coating comprising a metal layer carried between said inner face and a dielectric layer.

11. The coated glass article of claim 10 wherein the reflective coating is an infrared reflective coating including an inner dielectric layer between the metal layer and the inner face.

12. The coated glass article of claim 7 wherein the carbon layer is a graphite carbon layer.

13. The coated glass article of claim 7 wherein the transparent base layer has a refractive index that is substantially the same as the substrate.

14. The coated glass article of claim 13 wherein the transparent base layer has a refractive index that is less than about 1.7.

15. The coated glass article of claim 14 wherein the transparent base layer has a refractive index that is approximately between 1.35 and 1.65.

16. The coated glass article of claim 15 wherein the transparent base layer has a refractive index that is approximately between 1.4 and 1.55.

17. The coated glass article of claim 7 wherein the transparent base layer is a layer of silicon dioxide.

18. The coated glass articles of claim 7 wherein the thickness of the transparent base layer is less than about 100 angstroms.

19. The coated glass articles of claim 18 wherein the thickness of the transparent base layer is about 25-100 angstroms.

20. The coated glass articles of claim 14 wherein the thickness of the transparent base layer is about 50-70 angstroms.