Insulating glazing

• US 9,416,582 B2
• Filed: 06/23/2011
• Issued: 08/16/2016
• 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
• Primary Examiner(s): Shah, Samir
• Assistant Examiner(s): Yang, Zheren J
• Application Number:
  US13/805,542
• Publication Number:
  US 20130101760A1
• Time in Patent Office: 1,881 Days
• US Class Current: 1/1
• 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 first glass sheet having a first face 1 facing an outside of the double glazing and a second face 2 facing an interior of the double glazing; and

a second glass sheet comprising a first low-emissivity layer on a first face 3 facing the interior of the double glazing and a second low-emissivity layer on a second face 4 opposite the first face 3,

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

wherein the second low-emissivity layer comprises a pyrolytic layer of tin oxide doped with antimony or fluorine deposited by gas pyrolysis,

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

wherein at least one of the group consisting of a layer of SiOxCy, a set of layers of TiO₂.SiO₂, and a set of layers of SnO₂.SiO₂, is interposed between the second face 4 and the pyrolitic layer,

wherein at least one protection layer is interposed between the sputtering layer and the first face 3,

wherein the pyrolytic layer has a thickness of not less than 200 nm and a surface roughness Ra of less than 10 nm, and

wherein the double glazing has a haze of less than 0.3%.

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

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

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

5. The glazing of claim 4, wherein the sputtering layer comprises a silver-based layer having a thickness of between 10 and 15 nm.

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

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

8. 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.

9. The glazing of claim 1, wherein the protection layer comprises a material selected from the group consisting of SiO₂, Si₃N₄, tin oxide, and an oxide of a zinc/tin alloy.

10. The glazing of claim 1, wherein the pyrolytic layer is an outermost layer of the second face 4.

11. The glazing of claim 1, wherein a layer of SiOxCy is interposed between the second face 4 and the pyrolytic layer.

12. The glazing of claim 1, wherein a set of layers of TiO₂.SiO₂ is interposed between the second face 4 and the pyrolytic layer.

13. A double glazing, comprising:

a first glass sheet having a first face 1 facing an outside of the double glazing and a second face 2 facing an interior of the double glazing; and

a second glass sheet comprising a first low-emissivity layer on a first face 3 facing the interior of the double glazing and a second low-emissivity layer on a second face 4 opposite the first face 3,

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

wherein the second low-emissivity layer comprises a pyrolytic layer of tin oxide doped with antimony or fluorine deposited by gas pyrolysis,

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

wherein the pyrolytic layer has a thickness of not less than 200 nm and a surface roughness Ra of less than 10 nm, and

wherein the double glazing has a haze of less than 0.3%.

14. The glazing of claim 13, having a solar factor of at least 45% for a thicknesses of the clear glass sheets of 4 mm.

15. The glazing of claim 13, wherein the pyrolytic layer is such that the 4 mm second clear glass sheet, coated with the pyrolitic layer, has an emissivity of at most 0.20.

16. The glazing of claim 13, wherein the sputtering layer is such that the 4 mm second clear glass sheet, coated with the sputtering layer, has an emissivity of at most 0.01.

17. The glazing of claim 16, wherein the sputtering layer comprises a silver-based layer having a thickness of between 10 and 15 nm.

18. The glazing of claim 13, wherein a space between the first and the second glass sheets is filled with a gas having a low thermal conductivity.

19. The glazing of claim 13, wherein the glazing has a U coefficient of at most 0.9.

20. The glazing of claim 13, 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.