Asymmetric glass-plastics safety glass pane

• US 5,763,089 A
• Filed: 10/06/1995
• Issued: 06/09/1998
• Est. Priority Date: 10/06/1994
• Status: Expired due to Term

• Current Assignee: Saint-Gobain Vitrage
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Chaussade, Pierre, Heutte, Catherine
• Primary Examiner(s): Nakarani, D. S.
• Assistant Examiner(s): Rickman, Holly C.
• Application Number:
  US08/540,217
• Time in Patent Office: 977 Days
• Field of Search: 428/911, 428/430, 428/437, 428/448, 428/425.3, 428/425.6, 428/447, 156/104, 156/106
• US Class Current: 428/425.3
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10064 comprising at least two glass sheets, only one of which being an outer layer
• CPC Class Codes: B32B 17/1033 Laminated safety glass or glazing containing temporary protective coatings or layers
• CPC Class Codes: B32B 17/10688 Adjustment of the adherence to the glass layers
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 17/10889 shaping the sheets, e.g. by using a mould B32B17/10816 takes precedence
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y10T 428/31594 Next to aldehyde or ketone condensation product [phenol-aldehyde, etc.]
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

A glass-plastics bilayer safety glass pane, comprising a substrate of glass, and a complex sheet of plastics material comprising a layer of PVB and a film of polyester provided with a scratch-resistant and abrasion-resistant coating, and a layer of thermoplastic polyurethane incorporated between the glass substrate and the PVB layer.

Claims

1. A safety glass pane comprising:

(a) a glass substrate;

(b) a multi-layer sheet of plastic material comprising;

(i) a polyester layer having a first surface and a second surface,

(ii) a scratch-resistant and abrasion-resistant coating bonded to the first surface of the polyester layer, and

(iii) a layer of plasticized PVB bonded to the second surface of the polyester layer;

and

(c) a thermoplastic polyurethane layer incorporated between the glass substrate and the PVB layer of the multilayer sheet, the polyurethane layer bonding the glass substrate to the PVB layer,

wherein a primer comprising an organosilane has been deposited on a surface of the glass substrate or a surface of the thermoplastic polyurethane layer, between the glass substrate and the thermoplastic polyurethane layer.

2. The pane according to claim 1, wherein the polyester layer comprises PET.

3. The pane according to claim 1, wherein the glass substrate comprises a sheet of annealed or toughened glass.

4. The pane according to claim 3, wherein the glass substrate is chemically toughened.

5. The pane according to claim 1, wherein the polyurethane layer has a thickness of from 0.05 to 3 mm.

6. The pane according to claim 1, wherein the glass substrate comprises a laminated structure of glass.

7. The pane according to claim 1, wherein the scratch-resistant and abrasion-resistant coating comprises an organopolysiloxane.

8. The pane according to claim 1, wherein the primer composition is selected from the group consisting of gamma-aminopropyltriethoxysilane, gamma-aminopropyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-chloropropyltrimethoxysilane, and vinyltrichlorosilane.

9. The pane according to claim 1, wherein said pane comprises only one glass substrate.

10. A safety glass pane, comprising:

(a) a glass substrate;

(b) a multi-layer sheet of plastic material comprising;

(i) a polyester layer having a first surface and a second surface,

(ii) a scratch-resistant and abrasion-resistant coating bonded to the first surface of the polyester layer, and

(iii) a layer of plasticized PVB bonded to the second surface of the polyester layer;

and

(c) a thermoplastic polyurethane layer incorporated between the glass substrate and the PVB layer of the multi-layer sheet, the polyurethane layer bonding the glass substrate to the PVB layer,

wherein the thermoplastic polyurethane layer comprises an organosilane.

11. The pane according to claim 10, wherein the polyester layer comprises PET.

12. The pane according to claim 10, wherein the glass substrate comprises a sheet of annealed or toughened glass.

13. The pane according to claim 10, wherein the polyurethane layer has a thickness of from 0.05 to 3 mm.

14. The pane according to claim 10, wherein the glass substrate comprises a laminated structure of glass.

15. The pane according to claim 10, wherein the scratch-resistant and abrasion-resistant coating comprises an organopolysiloxane.

16. The pane according to claim 10, wherein said polyurethane layer has a thickness of at least 0.2 mm.

17. The pane according to claim 10, wherein said polyurethane has a thickness of from 0.1 to 3 mm.

18. The pane according to claim 10, wherein said polyurethane has a thickness of from 0.2 to 2 mm.

19. The pane according to claim 10, wherein said polyurethane has a thickness of from 0.2 to 1 mm.

20. The pane according to claim 10, wherein said polyurethane is cross-linked.

21. The pane according to claim 10, wherein said pane comprises only one glass substrate.

22. A method comprising:

interposing a thermoplastic polyurethane layer between a glass substrate and a multi-layer sheet;

wherein said multi-layer sheet comprises;

(i) a polyester layer having a first surface and a second surface,

(ii) a scratch-resistant and abrasion-resistant coating bonded to the first surface of the polyester layer, and

(iii) a layer of plasticized PVB bonded to the second surface of the polyester layer;

and

a surface of said glass sheet or a surface of said thermoplastic polyurethane having been treated with a primer composition comprising an organosilane.