Composite element and use thereof

Patent metadata

Field	Value
Publication number	US-10532946-B2
Application number	US-201615006269-A
Country	US
Kind code	B2
Filing date	Jan 26, 2016
Priority date	Jul 24, 2013
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A lightweight composite pane is provided that includes a mineral glass or glass-ceramic pane and an organic layer. The weight per unit area of the lightweight composite pane is in the range from 0.5 kg/m2 to 5.5 kg/m2, the ratio of the thickness of the mineral glass pane to the thickness of the organic layer is 1:0.01 to 1:1, and the thickness of the organic layer is less than or equal to 500 μm. The lightweight composite pane meets the thermal safety requirements of aerospace authorities and has a “Total Heat Release,” measured in compliance with JAR/FAR/CS 25, App. F, Part IV & AITM 2.0006, of less than 65 kW×min/m2 and a flame time, after removal of the flame in the “Vertical Bunsen Burner Test”, measured in compliance with FAR/JAR/CS 25, App. F, Part 1 & AITM 2.0002A, is less than 15 seconds.

First claim

What is claimed is:

1. A lightweight composite pane for viewing windows, comprising:
a mineral glass pane, wherein the mineral glass pane is prestressed and has a glass pane refractive index;
an organic layer adjacent the mineral glass pane, wherein organic layer has an organic layer refractive index;
a weight per unit area having a lower limit of 0.5 kg/m 2 and an upper limit of 5.5 kg/m 2 ;
a ratio of a thickness of the mineral glass pane to a thickness of the layer is 1:0.01 to 1:1, wherein the thickness of the layer is less than or equal to 450 μm; and
an absolute heat release, measured in compliance with JAR/FAR/CS 25, App. F, Part IV & AITM 2.0006, of less than 65 kW×min/m 2 ,
wherein the glass pane refractive index and the organic layer refractive index have a difference therebetween that is less than or equal to 0.3,
wherein the organic layer comprises a duroplastic reaction resin that is a polymer selected from the group consisting of phenoplasts, phenol formaldehyde resins, aminoplasts, urea formaldehyde resins, melamine formaldehyde resins, epoxide resins, unsaturated polyester resins, vinyl ester resins, phenacrylate resins, diallyl phthalate resins, cross-linking polyurethane resins, polymethacrylate reaction resins, and polyacrylate reaction resins, and any combinations thereof.

2. The lightweight composite pane according to claim 1 , wherein the lower limit is greater than or equal to 1 kg/m 2 , the upper limit is less than or equal to 3 kg/m 2 , the ratio is 1:0.01 to 1:0.9, the thickness of the layer is less than or equal to 350 μm, and the absolute heat release of less than 50 kW×min/m 2 .

3. The lightweight composite pane according to claim 1 , further comprising a fire protection property with a flame time after removal of the flame in the vertical Bunsen burner test, measured in compliance with FAR/JAR/CS 25, App. F, Part I, of less than 15 s.

4. The lightweight composite pane according to claim 1 , further comprising a transparency of greater than 80%.

5. The lightweight composite pane according to claim 1 , further comprising an optical scattering behavior of less than or equal to 1.5%.

6. The lightweight composite pane according to claim 1 , wherein the thickness of the mineral glass pane is less than or equal to 1 mm and greater than or equal to 200 μm.

7. The lightweight composite pane according to claim 1 , wherein the mineral glass pane is selected from the group consisting of a lithium aluminum silicate glass, a soda-lime silicate glass, a borosilicate glass, an alkali aluminosilicate glass, an alkali-free aluminosilicate glass, a low-alkali aluminosilicate glass, a chemically hardened lithium aluminum silicate glass, a chemically hardened soda-lime silicate glass, a chemically hardened borosilicate glass, a chemically hardened alkali aluminosilicate glass, a chemically hardened alkali-free aluminosilicate glass, a chemically hardened low-alkali aluminosilicate glass, a thermally hardened lithium aluminum silicate glass, a thermally hardened soda-lime silicate glass, a thermally hardened borosilicate glass, a thermally hardened alkali aluminosilicate glass, a thermally hardened alkali-free aluminosilicate glass, and a thermally hardened low-alkali aluminosilicate glass.

8. The lightweight composite pane according to claim 1 , wherein the mineral glass pane is a mineral glass-ceramic pane selected from the group consisting of a ceramicized aluminosilicate glass, a ceramicized lithium aluminosilicate glass, a chemically hardened ceramicized aluminosilicate glass, a chemically hardened ceramicized lithium aluminosilicate glass, a thermally hardened ceramicized aluminosilicate glass, and a thermally hardened ceramicized lithium aluminosilicate glass.

9. The lightweight composite pane according to claim 8 , wherein the mineral glass pane is a chemical hardened mineral glass-ceramic pane having an ion-exchange depth of greater than or equal to 30 μm.

10. The lightweight composite pane according to claim 1 , wherein the mineral glass pane has a surface compressive stress that is greater than or equal to 500 MPa.

11. The lightweight composite pane according to claim 1 , wherein the mineral glass pane has an internal tensile stress that is less than or equal to 50 MPa.

12. The lightweight composite pane according to claim 1 , wherein the mineral glass pane has a 4-point bending strength that is greater than or equal to 550 MPa.

13. The lightweight composite pane according to claim 1 , wherein the mineral glass pane has a modulus of elasticity that is greater than or equal to 68 GPa.

14. The lightweight composite pane according to claim 1 , wherein the mineral glass pane has a sheer modulus that is greater than or equal to 25 GPa.

15. The lightweight composite pane according to claim 1 , wherein the mineral glass pane has a Vickers hardness that is greater than or equal to 550 HV 2/20.

16. The lightweight composite pane according to claim 1 , wherein the layer further comprises fillers.

17. The lightweight composite pane according to claim 1 , wherein the layer has a transparency that is greater than 80%, the lightweight composite pane further comprising a haze that increases by less than 1% owing to the layer.

18. The lightweight composite pane according to claim 1 , wherein the layer has an outward-facing surface having a waviness of less than or equal to 100 nm and a roughness R T of less than or equal to 30 nm.

19. The lightweight composite pane according to claim 1 , wherein the layer has an optical retardation that is not greater than 20 nm.

20. The lightweight composite pane according to claim 1 , wherein the layer has a streak that is less than 100 nm.

21. The lightweight composite pane according to claim 1 , wherein the layer has a modulus of elasticity that is less than 5 GPa.

22. The lightweight composite pane according to claim 1 , further comprising a difference in a refractive index of the mineral glass pane and the layer that is less than or equal to 0.3.

23. The lightweight composite pane according to claim 1 , wherein the mineral glass pane is thermally prestressed, chemically prestressed, or a combination of thermally and chemically prestressed.

24. A lightweight composition pane for viewing windows according to claim 1 , wherein the difference between the refractive index of the glass pane and the refractive index of the organic layer is less than or equal to 0.2.

25. A lightweight composition pane for viewing windows according to claim 1 , wherein the difference between the refractive index of the glass pane and the refractive index of the organic layer is less than or equal to 0.15.

26. A lightweight composition pane for viewing windows according to claim 1 , wherein the refractive index for the glass pane is between 1.508 and 1.52 at 588 nm wavelength.

Assignees

• Schott Ag

Inventors

• Meiss Jens
• Ottermann Clemens
• Esemann Hauke
• Fechner Joerg Hinrich
• Heiss-Chouquet Markus

Classifications

• C03C21/001

  in liquid phase, e.g. molten salts, solutions · CPC title

• C03C17/30 Primary

  with silicon-containing compounds · CPC title

• C03C17/007

  containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase · CPC title

• B64C1/1492

  Structure and mounting of the transparent elements in the window or windscreen · CPC title

• B32B17/10137

  Chemical strengthening · CPC title