INSULATING GLAZING

• US 20130101760A1
• Filed: 06/23/2011
• Published: 04/25/2013
• Est. Priority Date: 06/24/2010
• Status: Active Grant

• Current Assignee: AGC Glass Europe SA (AGC, Inc.)
• Original Assignee: AGC Glass Europe SA (AGC, Inc.)
• Inventors: Pesce, Lorenzo, Tixhon, Eric
• Granted Patent: US 9,416,582 B2
• Time in Patent Office: Days
• US Class Current: 428/34
• CPC Class Codes: C03C 17/245 by deposition from the vapour phase
• CPC Class Codes: C03C 17/2453 Coating containing SnO2
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3644 the metal being 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 2217/24 Doped oxides
• CPC Class Codes: C03C 2217/241 with halides
• CPC Class Codes: C03C 2217/244 with Sb
• CPC Class Codes: C03C 2217/94 Transparent conductive oxide layers [TCO] being part of a multilayer coating
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: E06B 2009/2417 Light path control; means to control reflection
• CPC Class Codes: E06B 3/66 Units comprising two or more parallel glass or like panes permanently secured together reforming and uniting glass sheets by fusing C03B23/00; joining glass to glass or to other materials C03C27/00; laminated glass B32B17/10
• CPC Class Codes: E06B 3/6612 Evacuated glazing units
• CPC Class Codes: E06B 3/6715 specially adapted for increased thermal insulation or for controlled passage of light E06B3/66323 takes precedence; coating of glass pains C03C17/00; devices or arrangements for controlling the intensity, colour, phase, polarisation or direction of light G02F1/00
• CPC Class Codes: E06B 9/24 Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blindsoperating, guiding or securing devices or arrangements for roll-type closures E06B9/56; free-hanging flexible screens A47H23/00
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified

Abstract

The invention relates to double glazing comprising at least one glass sheet that has a set of low-emission layers on each side, one side being coated with layers which are produced using sputtering and which include at least one metal layer that reflects infrared radiation. The other side of said at least one glass sheet comprises one or more metal oxide layers that are deposited using gas phase pyrolysis. The disclosed glazing has a minimum light transmittance of 60 percent (with 4 mm thick clear glass sheets).

Claims

1. A double glazing, comprising:

a glass sheet comprising a first low-emissivity layer on a first face and a second low-emissivity layer on a second face,

wherein the first low-emissivity layer comprises a sputtering layer comprising an infrared-reflecting metal layer and produced by sputtering, and

wherein the second low-emissivity layer comprises a pyrolytic layer of metal oxides deposited by gas pyrolysis, and

wherein the double glazing has a light transmission of not less than 60% for thicknesses of the clear glass sheets of 4 mm.

2. The glazing of claim 1, wherein, each face beginning numbered sequentially from the outside of a structure comprising the double glazing, the pyrolytic layer is in position 4 and the sputtering layer is in position 3.

3. The glazing of claim 1, having a solar factor of at least 45% for thicknesses of the clear glass sheets of 4 mm.

4. The glazing of claim 1, wherein the glazing has a haze of less than 0.7%.

5. The glazing of claim 1, wherein the pyrolytic layer comprises a layer of tin oxide doped with antimony or fluorine.

6. The glazing of claim 5, wherein at least one layer of a layer of SiOxCy, a set of layers of TiO₂.SiO₂, and a set of layers of SnO₂.SiO₂ is interposed between the glass sheet and the layer of doped tin oxide.

7. The glazing of claim 6, wherein the pyrolytic layer has a thickness of not less than 200 nm.

8. The glazing of claim 6, wherein the pyrolytic layer has a surface roughness Ra of less than 10 nm.

9. The glazing of claim 1, wherein the pyrolytic layer is such that the 4 mm clear glass sheet, coated with the layer, has an emissivity of at most 0.20.

10. The glazing of claim 1, wherein the sputtering layer is such that the 4 mm clear glass sheet, coated with the layers, has an emissivity of at most 0.01.

11. The glazing of claim 10, wherein the sputtering layer comprises a silver-based layer having a thickness of between 10 and 15 nm.

12. The glazing of claim 1, comprising a second glass sheet, wherein a space between the first and the second glass sheets is filled with a gas having a low thermal conductivity.

13. The glazing of claim 12, wherein the gas comprises at least 90% argon.

14. The glazing of claim 1, wherein the glazing has a U coefficient of at most 0.9.

15. The glazing of claim 1, wherein the glazing has, in a CIELAB system under an illuminant D65 and under 2°

, reflection colorimetric coordinates such that;

−

6≦

a*≦

3

−

6≦

b*≦

3

16. The glazing of claim 1, wherein the glazing has a haze of less than 0.5%.