Patent US5318487A successfully refreshed from Google Patents.
Patent US3900686A successfully refreshed from Google Patents.
US3900686A
Expired / Lapsed
US
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Adhesion control for safety glass laminates
Assignee: PPG Industries Inc
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Filing: 1973-10-03
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Granted: 1975-08-19
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Expires: 1993-10-03
Abstract
Abstract An improved polyurethane composition useful as an interlayer for safety glass window applications such as bilayer motor vehicle windshields is disclosed. The polyurethane is specially formulated with an organic silane and an organic phosphorus acid to provide a controlled degree of adhesion to glass maintainable under a wide range of humidity and temperature conditions, particularly higher temperature and humidity conditions, which are especially detrimental to the maintenance of adhesion. The controlled degree of adhesion between the polyurethane and the glass provides improved penetration resistance in glasspolyurethane safety glass laminates.
Inventors
- 👤 Vernon G Ammons
- 👤 James C Vanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10018; B32B17/1055; B32B17/10688; B32B17/1077; B32B17/10807; B32B17/10816; B32B17/10825; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/50; B32B2307/56; B32B2605/00; B32B2605/006; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
AN ENERGY ABSORBING LAMINATE COMPRISING A TRANPARENT, THIN, ENERGY ABSORBING LAYER OF A POLYURETHANE COMPOSITION BONDED ON AT LEAST ONE OF ITS MAJOR SURFACES TO A GLASS SHEET, SAID COMPOSITION CONTAINING (A) AN ORGANIC PHOSPHOROUS ACID SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
42 words
AN ENERGY ABSORBING LAMINATE COMPRISING A TRANPARENT, THIN, ENERGY ABSORBING LAYER OF A POLYURETHANE COMPOSITION BONDED ON AT LEAST ONE OF ITS MAJOR SURFACES TO A GLASS SHEET, SAID COMPOSITION CONTAINING (A) AN ORGANIC PHOSPHOROUS ACID SELECTED FROM THE CLASS CONSISTING OF
Claim 3
Dependent Claim
38 words
The energy absorbing laminate of claim 1 which comprises a transparent, thin, energy absorbing layer of a polyurethane composition bonded on one major surface to a glass sheet and having the other major surface exposed to the atmosphere.
Claim 4
Dependent Claim
69 words
The energy absorbing laminate of claim 1 which has a mean penetration velocity of at least 30 miles per hour for a 5-pound freely falling ball at a laminate temperature of 70*F. when an approximately 0.030-0.040 inch thick urethane is adhered to one sheet of 1/8 -inch thick 12-inch by 12-inch float glass to form the laminate, and the laminate is held rigid and impacted on the urethane side.
Claim 5
Dependent Claim
15 words
The laminate of claim 1 wherein the organic phosphorus acid is an organic acid phosphate.
Claim 6
Dependent Claim
29 words
The laminated article of claim 4 wherein the organic acid phosphate is an alkyl acid phosphate in which the alkyl group contains from between 8 and 18 carbon atoms.
Claim 7
Dependent Claim
25 words
The laminated article of claim 5 wherein the alkyl acid phosphate is selected from the class consisting of lauryl acid phosphate and stearyl acid phosphate.
Claim 8
Dependent Claim
22 words
The laminated glass article of claim 1 wherein R is selected from the class consisting of gamma-methacryloxypropyl, beta-(3,4-epoxy-cyclohexyl), mercaptopropyl, gamma-glycidoxypropyl, gamma-aminopropyl, N-beta-aminoethyl-gamma-aminopropyl.
Claim 9
Dependent Claim
19 words
The glass laminate of claim 1 wherein X is selected from the class consisting of halo, alkoxy and acyloxy.
Claim 10
Dependent Claim
13 words
The glass laminate of claim 8 in which the organic silane is gamma-glycidoxy-propyltrimethoxysilane.
Claim 11
Dependent Claim
42 words
The laminate of claim 1 in which the organic phosphorus acid and the organo-functional silane are present in concentrations of 0.03 to 0.20 percent by weight and 0.15 to 0.3 percent by weight, respectively, based on total weight of the polyurethane composition.
Claim 12
Dependent Claim
28 words
The energy absorbing laminate of claim 1 in which the weight ratio of organic phosphorus acid to organo-functional silane is within the range of 0.15 to 0.65 inclusive.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |