Glazing article

• US 4,584,229 A
• Filed: 02/10/1984
• Issued: 04/22/1986
• Est. Priority Date: 12/11/1980
• Status: Expired due to Term

• Current Assignee: Saint-Gobain Vitrage
• Original Assignee: Saint-Gobain Vitrage
• Inventors: Daude, Gerard, Bourelier, Claude, Orain, Roger
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Johnson, Beverly K.
• Application Number:
  US06/579,035
• Time in Patent Office: 802 Days
• Field of Search: 428/213, 428/216, 428/423.1, 428/423.3, 428/425.5, 428/425.6, 428/911, 428/215, 296/84
• US Class Current: 428/216
• CPC Class Codes: B32B 17/10018 comprising only one glass sheet
• CPC Class Codes: B32B 17/10688 Adjustment of the adherence to the glass layers
• CPC Class Codes: B32B 17/1077 containing polyurethane
• CPC Class Codes: B32B 17/10899 by introducing interlayers of synthetic resin
• CPC Class Codes: B32B 2307/56 Damping, energy absorption
• CPC Class Codes: B32B 2307/762 Self-repairing, self-healing
• CPC Class Codes: B32B 2375/00 Polyureas; Polyurethanes
• CPC Class Codes: B32B 2419/00 Buildings or parts thereof walls, panels B32B2607/00
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 2605/006 Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings
• CPC Class Codes: C08G 18/0823 containing carboxylate salt groups or groups forming them
• CPC Class Codes: C08G 18/10 Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
• CPC Class Codes: C08G 18/3234 cycloaliphatic
• CPC Class Codes: C08G 18/7831 containing biuret groups
• CPC Class Codes: Y10S 428/911 Penetration resistant layer
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/31554 Next to second layer of polyamidoester
• CPC Class Codes: Y10T 428/31601 Quartz or glass

Abstract

Glazing comprising a support, an interlayer of a polyurethane-polyurea having energy absorbing properties, and an outer layer comprising a material having self-healing properties.

Claims

1. A glazing laminate comprising a first plastic layer having energy absorbing properties and a second plastic layer comprising a thermoset polyurethane having anti-lacerative and self-healing properties, said first plastic layer formed from a reaction mixture including a thermoplastic polyurethane-polyurea containing about 1 to about 20% by weight of urea groups and at least one polyisocyanate having NCO functionality greater than two.

2. A glazing laminate according to claim 1, wherein said second plastic layer comprises a polyurethane formed by curing a liquid mixture containing (1) a polyglycol ether resulting from the condensation of propylene oxide with trimethylolpropane and containing about 10.5 to 12% by weight free hydroxyls together with (2) a biuret of 1,6-hexamethylene diisocyanate having about 21 to 22% by weight isocyanate groups, the weight of said biuret being between about 0.9 to 1.1 times the weight of said polyglycol ether.

3. A glazing laminate according to claim 2 wherein said polyurethane-polyurea is formed from the reaction of a polyurethane NCO-prepolymer and an organic diamine.

4. A glazing laminate according to claim 1 or 3 wherein said first plastic layer includes an alkoxy silane adhesion promoter.

5. A glazing laminate according to claim 4 wherein said polyurethane NCO-prepolymer is prepared from a reaction mixture including a dihydroxy carboxylic acid.

6. A glazing laminate according to claim 4 wherein said first plastic layer contains a leveling agent.

7. A glazing laminate according to claim 2 wherein said first plastic layer has a thickness of about 0.2 mm to about 1 mm and said second plastic layer has a thickness of about 0.2 mm to about 0.8 mm.

8. A glazing laminate according to claim 1 or 7 wherein said first plastic layer is affixed to a rigid transparent substrate.

9. A safety windshield comprising a glazing laminate according to claim 8.

10. A glazing laminate according to claim 8 wherein said rigid transparent substrate is glass, and wherein said first plastic layer includes an alkoxy silane adhesion promoter and a leveling agent.

11. A multi-ply flexible sheet, one ply of which comprises the product of a reaction mixture of a polyurethane-polyurea and a polyisocyanate having more than 2 NCO groups and which has energy absorbing properties and the other ply of which comprises a thermoset polyurethane having anti-lacerative and self-healing properties.

12. A safety glazing including a rigid plastic or glass substrate having adhered to a ply thereof the sheet of claim 11, said sheet being adhered to said ply by said polyurethane-polyurea reaction mixture product.

13. A safety glazing according to claim 12 in the form of a vehicle windshield and in which said substrate is glass.