Low reflectance, highly saturated colored coating for monolithic glazing

• US 5,112,693 A
• Filed: 10/03/1988
• Issued: 05/12/1992
• Est. Priority Date: 10/03/1988
• Status: Expired due to Term

• Current Assignee: PPG Industries Incorporated Pittsburgh PA
• Original Assignee: PPG Industries Incorporated (Nouryon BV)
• Inventors: Gillery, Frank H.
• Primary Examiner(s): Robinson, Ellis P.
• Assistant Examiner(s): TURNER, ARCHENE A
• Application Number:
  US07/252,475
• Time in Patent Office: 1,317 Days
• Field of Search: 428/426, 428/432, 428/433, 428/434, 428/688, 428/689, 428/698, 428/699, 428/701, 428/913, 428/469, 428/623, 428/621, 428/472, 428/697, 350/1.6, 350/1.7, 350/166
• US Class Current: 428/432
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/3423 at least one of the coatings comprising a suboxide
• CPC Class Codes: C03C 17/3435 comprising a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3607 Coatings of the type glass/inorganic compound/metal
• CPC Class Codes: C03C 17/361 Coatings of the type glass/metal/inorganic compound/metal/inorganic compound/other
• CPC Class Codes: C03C 17/3626 one layer at least containing a nitride, oxynitride, boronitride or carbonitride
• CPC Class Codes: C03C 17/3649 made of metals other than silver
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C03C 2217/78 Coatings specially designed to be durable, e.g. scratch-resistant
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture

Abstract

A transparent article for reflecting solar energy comprising a zinc/tin oxide film which exhibits color by interference effects and a reflective metal film preferably comprising chromium is disclosed along with a sputtering method for its production.

Claims

1. An article of manufacture for the reflectance of solar energy comprising:

a. a transparent substrate;

b. a transparent metal oxide film comprising zinc and tin of a thickness which exhibits intense color by interference effects deposited on a surface of said substrate; and

c. a reflective transparent metallic film deposited on said metal oxide film

wherein the combination of colored metal oxide and reflective metallic films forms a reflective coating of relatively saturated color.

2. An article of manufacture according to claim 1, wherein the substrate is glass.

3. An article of manufacture according to claim 2, wherein the reflective metallic film comprises a metal selected from the group consisting of chromium, titanium, stainless steel and nickel alloys.

4. An article of manufacture according to claim 3, wherein the reflective metallic film is selected from the group consisting of chromium metal, chromium oxide, chromium nitride, titanium metal, titanium nitride, stainless steel and Inconel.

5. An article according to claim 4, wherein the reflective metallic film is chromium nitride.

10. An article according to claim 1, wherein the thickness of said transparent film of metal oxide is sufficient for the coated article to exhibit a blue interference color.

6. An article comprising:

a. a transparent substrate;

b. a transparent metal oxide film comprising zinc and tin of a thickness which exhibits color by interference effects;

c. a reflective transparent metallic film deposited on said metal oxide film; and

d. a second transparent reflective metallic film deposited between the substrate and the metal oxide film.

7. An article according to claim 6, wherein the second transparent reflective metallic film comprises a metal selected from the group consisting of chromium, titanium, stainless steel and nickel alloys.

8. An article according to claim 7, wherein said second metallic film is selected from the group consisting of chromium metal, chromium oxide, chromium nitride, titanium metal, titanium nitride, stainless steel and Inconel.

9. An article according to claim 8, wherein said second metallic film is chromium nitride.