Patent US4584229A successfully refreshed from Google Patents.
US4584229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glazing article
Assignee: Saint Gobain Vitrage SA
•
Filing: 1984-02-10
•
Granted: 1986-04-22
•
Expires: 2004-02-10
Abstract
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.
Inventors
- 👤 Claude Bourelier
- 👤 Gerard Daude
- 👤 Roger Orain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:13
CPC Classifications
C; C03; C03C; C03C27/00; C03C27/06; C03C27/10; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/1055; B32B17/10688; B32B17/1077; B32B17/10807; B32B17/10899; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/10; B32B2307/00; B32B2307/50; B32B2307/56; B32B2307/70; B32B2307/762; B32B2375/00; B32B2419/00; B32B2551/00; B32B2605/00; B32B2605/006; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
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.
Claim 2
Dependent Claim
61 words
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.
Claim 3
Dependent Claim
80 words
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.
Claim 4
Dependent Claim
23 words
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.
Claim 5
Dependent Claim
20 words
A glazing laminate according to claim 1 or 3 wherein said first plastic layer includes an alkoxy silane adhesion promoter.
Claim 6
Dependent Claim
22 words
A glazing laminate according to claim 4 wherein said polyurethane NCO-prepolymer is prepared from a reaction mixture including a dihydroxy carboxylic acid.
Claim 7
Dependent Claim
16 words
A glazing laminate according to claim 4 wherein said first plastic layer contains a leveling agent.
Claim 8
Dependent Claim
39 words
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.
Claim 9
Dependent Claim
21 words
A glazing laminate according to claim 1 or 7 wherein said first plastic layer is affixed to a rigid transparent substrate.
Claim 10
Dependent Claim
11 words
A safety windshield comprising a glazing laminate according to claim 8.
Claim 11
Dependent Claim
30 words
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.
Claim 12
Dependent Claim
48 words
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.
Claim 13
Dependent Claim
48 words
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.
Claim 14
Dependent Claim
34 words
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.
Claim 15
Dependent Claim
21 words
A safety glazing according to claim 12 in the form of a vehicle windshield and in which said substrate is glass.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |