Coated tinted glass article and method of making same

Patent metadata

Field	Value
Publication number	US-9957194-B2
Application number	US-201213261737-A
Country	US
Kind code	B2
Filing date	Mar 15, 2012
Priority date	Mar 30, 2011
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

The invention relates to a multi-layer pyrolytic coating stack deposited on a tinted glass substrate to form a coated glass article exhibiting a desired combination of emissivity, visible light transmittance and solar heat gain coefficient. A method for depositing the multi-layer coating stack on the tinted glass substrate is also part of the invention.

First claim

What is claimed is:

1. A coated glass article comprising:
a tinted glass substrate;
a fluorine doped tin oxide coating deposited over the tinted glass substrate; and
an overcoat consisting of silica deposited over and in contact with the fluorine doped tin oxide coating, the overcoat having a thickness between 30 nm and 50 nm;
the coated glass article exhibiting a visible light transmittance >70% as measured by Illuminant A (10 degree observer), a solar heat gain coefficient ≤0.55 and a hemispherical emissivity <0.4.

2. The coated glass article defined in claim 1 , wherein the tinted glass is green, blue, or blue-green in color, falling within the CIELAB color coordinate range of a*=−10.5 to −4 and b*=−6.5 to +4, as measured by Illuminant C.

3. The coated glass article defined in claim 2 , wherein the tinted glass falls within the CIELAB color coordinate range a*=−8.8 to −5.5 and
b*=−3 to +2, as measured by Illuminant C.

4. The coated glass article defined in claim 1 , wherein a color suppression coating is deposited between the tinted glass substrate and the fluorine doped tin oxide coating.

5. The coated glass article defined in claim 4 , wherein the color suppression coating comprises: an undoped tin oxide coating having a thickness of 20 nm-30 nm deposited over the tinted glass substrate and a silica coating having a thickness of 20 nm-30 nm deposited over the undoped tin oxide coating.

6. The coated glass article defined in claim 4 , wherein the fluorine doped tin oxide coating has a thickness less than 350 nm.

7. The coated glass article defined in claim 6 , wherein the film side reflectance of the coated glass article is <7% as measured by Illuminant A (10 degree observer).

8. A method of depositing a multi-layer coating stack on a substrate to form a coated glass article comprising:
providing a moving, heated glass substrate supported on a bath of molten metal in a glass manufacturing process, at substantially atmospheric pressure, wherein the glass is a tinted glass;
depositing a fluorine doped tin oxide coating comprising a tin compound and a dopant over the heated glass substrate; and
depositing an overcoat consisting of silica over and in contact with the fluorine doped tin oxide coating, wherein the overcoat is deposited at a thickness between 30 nm and 50 nm, and wherein the coated tinted substrate exhibits a visible light transmittance >70% as measured by Illuminant A (10 degree observer), a solar heat gain coefficient ≤0.55 and a hemispherical emissivity <0.4.

9. The method defined in claim 8 , wherein a color suppression coating comprising one or more of a tin compound and a silica compound is deposited over the tinted glass substrate and prior to the deposition of the fluorine doped tin oxide coating.

10. The method defined in claim 8 , wherein the tinted glass is green, blue, or blue-green in color, falling within the CIELAB color coordinate range of a*=−10.5 to −4 and b*=−6.5 to =4, as measured by Illuminant C.

11. The method defined in claim 10 , wherein the tinted glass falls within the CIELAB color coordinate range of a*=−8.8 to −5.5 and b*=−3 to +2 as measured by Illuminant C.

12. The method define in claim 9 , wherein the color suppression coating comprises: an undoped tin oxide coating having a thickness of 20 nm-30 nm deposited over the tinted glass substrate and a silica coating having a thickness of 20 nm-30 nm deposited over the undoped tin oxide coating.

13. The method defined in claim 8 , wherein the fluorine doped tin oxide coating is deposited at a thickness less than 350 nm.

14. The coated glass article defined in claim 1 , wherein the tinted glass substrate has a thickness of at least 5 mm.

15. The coated glass article defined in claim 1 , wherein the tinted glass substrate has a thickness of 5 to 6 mm.

Assignees

• Soubeyrand Michel J
• Varanasi Srikanth
• Pilkington Group Ltd

Inventors

• Soubeyrand Michel J
• Varanasi Srikanth

Classifications

• Y10T428/265

  1 mil or less · CPC title

• Y10T428/24975

  No layer or component greater than 5 mils thick · CPC title

• C03C2218/1525

  by atmospheric CVD · CPC title

• C03C17/3417 Primary

  all coatings being oxide coatings · CPC title

• C03C17/002

  for flat glass, e.g. float glass · CPC title