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1. WO2020112754 - INSULATED GLASS UNITS WITH LOW CTE CENTER PANES

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

WHAT IS CLAIMED IS:

1. An insulated glass unit (1100) comprising:

a first pane (1 10);

a second pane (120);

a third pane (130) disposed between the first pane and the second pane; a first sealed gap space (125) defined between the first pane and the third pane; and

a second sealed gap space (115) defined between the second pane and the third pane;

wherein the third pane comprises a first glass sheet (131) having a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 70 x 10_7/°C.

2. The insulated glass unit of claim 1 , wherein the third pane further comprises a second glass sheets (132) laminated to the first glass sheet (131) with a polymer interlayer (133), the second glass sheets having a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 70 x 10_7/°C.

3. The insulated glass unit of claim 1 or 2, wherein one or both of the first and second glass sheets have a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 50 x 10_7/°C.

4. The insulated glass unit of claim 1 or 2, wherein one or both of the first and second glass sheets have a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 35 x 10_7/°C.

5. The insulated glass unit of any of the previous claims, wherein the third pane comprises a boro-aluminosilicate glass.

6. The insulated glass unit of claim 5, wherein the third pane comprises an alkaline earth boro-aluminosilicate glass or an alkali-free boro-aluminosilicate glass.

7. The insulated glass unit of any of the previous claims, wherein the third pane comprises float-formed glass.

8. The insulated glass unit of any of the previous claims, wherein the third pane has a thickness of less than about 1.6 mm.

9. The insulated glass unit of any of the previous claims, wherein the third pane has a thickness of less than about 0.9 mm.

10. The insulated glass unit of any of the previous claims, wherein at least one of an inner surface (114) of the first pane, an inner surface (124) of the second pane, or at least one of the major surfaces (134,137) of the third pane is coated with at least one low emissivity coating (116, 117,136).

11. The insulated glass unit of claim 10, wherein at least one major surface of the third pane is coated with at least one low emissivity coating (136).

12. An insulated glass unit (1101) comprising:

a first pane (1 10);

a second pane (120);

a third pane (130); and

a fourth pane (140) disposed between the first pane and the second pane;

a first sealed gap space (115) defined between the first pane and the third pane; and

a second sealed gap space (125) defined between the third pane and the fourth pane;

a third sealed gap space (135) defined between the second pane and the fourth pane;

wherein the third pane comprises a first glass sheet (131) having a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 70 x 10_7/°C.

13. The insulated glass unit of claim 12, wherein the third pane further comprises a second glass sheets (132) laminated to the first glass sheet (131) with a polymer interlayer (133), the second glass sheets having a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 70 x 10_7/°C.

14. The insulated glass unit (1200) of claim 13, wherein the fourth pane comprises a first glass sheet (141) and a second glass sheet (142) laminated together with a polymer interlayer (143), the first glass sheet and the second glass sheet having a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 70 x 10_7/°C.

15. The insulated glass unit of claim 14, wherein the first glass sheet and the second glass sheet of the third pane and the first glass sheet and the second glass sheet of the fourth pane each have a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 35 x 10

7/°C.

16. The insulated glass unit of claim 15 wherein the third pane and the fourth pane each have a thickness of less than about 1.6 mm.

17. A method (1102) of making an insulated glass unit, the method comprising the steps of:

cutting a selected size glass sheet (130) from a larger glass sheet (150) having a first major surface (151) and a second major surface (152), the larger glass sheet (150) having a coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 70 x 10_7/°C and a thickness of less than about 0.9 mm;

assembling the glass sheet as a third pane (130) or as a component of a third pane (130) together with a first pane (110) and a second pane (120), or together with a first pane (110), a second pane (120), and a fourth pane (140), to form an insulated glass unit (1000, 1100, 1101) having the third pane (130) positioned between the first pane (110) and the second pane (120) with a first a first sealed gap space (115) positioned on one side of the third pane (130) and a second sealed gap space (125) positioned on the other side of the third pane (130).

18. The method of claim 17, wherein the larger glass sheet (150) has coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 50 x 10_7/°C.

19. The method of claim 17, wherein the larger glass sheet (150) has coefficient of thermal expansion (CTE) over a temperature range 0 to about 300°C of less than about 35 x 10_7/°C.

20. The method of any of claims 17-19, wherein the larger glass sheet (150) has a thickness of less than about 0.8 mm.

21. The method of any of claims 17-19, wherein the larger glass sheet (150) has a thickness of greater than about 0.4 mm.

22. The method according to claim 17 wherein the larger glass sheet is a laminated sheet comprising a first glass sheet (151) and a second glass sheets (151 ,152) laminated together with a polymer interlayer (153).

23. The method according to claim any of claims 17-22 wherein the thickness of the third pane is greater than about 0.8 mm.

24. The method according to claim 23 wherein the laminated sheet has length and width dimensions larger than about 1.3 x about 1.3 m.

25. The method according to any of claims 17-24 wherein at least one of the major surfaces of the larger sheet is coated with at least one low emissivity coating (156).

26. The method of claim 17, wherein the assembling step further comprises providing an architectural product.