US3791914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated glass articles
Assignee: PPG Industries Inc
•
Filing: 1972-01-26
•
Granted: 1974-02-12
•
Expires: 1992-01-26
Abstract
Abstract This invention relates to polyurethane resins having reduced adhesion to other materials. It particularly pertains to polyurethane interlayers, especially interlayers utilized in laminated safety glass articles. More particularly, this invention relates to polyurethane compositions comprising the reaction product of an organic polyisocyanate and an organic polyol which has reduced adhesion to other materials due to the inclusion therein of a proton containing compound of phosphorus, preferably acid organic phosphorus compounds.
Inventors
- 👤 V Ammons
- 👤 M Dufala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:48
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/1077; B32B17/10688; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31598; Y10T428/31601
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
28 words
The laminated window of claim 1 wherein the alkyl acid phosphorus ester has a molecular weight of less than about 1,000 per acid hydrogen present in the ester.
Claim 2
Dependent Claim
19 words
The laminated window of claim 1 wherein the alkyl acid phosphorus ester has an acid number above about 50.
Claim 3
Dependent Claim
17 words
The laminated window of claim 1 wherein the alkyl acid phosphorus ester is an alkyl acid phosphate.
Claim 4
Dependent Claim
15 words
The laminated window of claim 4 wherein the alkyl acid phosphate is methyl acid phosphate.
Claim 5
Dependent Claim
17 words
The laminated window of claim 1, wherein the alkyl acid phosphorus ester is an alkyl acid phosphite.
Claim 6
Dependent Claim
148 words
A safety glass laminate of a plurality of solid glass sheets having disposed between adjacent sheets an adherent, transparent, solid interlayer material bonding said sheets of glass together, said interlayer material comprising a polyurethane resin derived from an organic polyisocyanAte and an organic polyol, and containing about 0.01 to about 3.0 per cent by weight of an alkyl acid phosphorus ester; said percentage of alkyl acid phosphorus ester being sufficient to reduce the normal adhesiveness of the polyurethane to glass in the laminated glass window and to increase its impact resistance such that when the polyurethane is adhered to and sandwiched between two 1/8-inch thick, 12 by 12-inch glass sheets to form a laminate, and the laminate is held rigid and the polyurethane layer is approximately 0.030 inch thick the laminate retains a 5 pound steel ball dropped perpendicularly from a distance greater than 17 feet at 76*F.
Claim 7
Dependent Claim
29 words
The safety glass laminate of claim 7 wherein the alkyl acid phosphorus ester has a molecular weight of less than about 1,000 per acid hydrogen present in the ester.
Claim 8
Dependent Claim
19 words
The safety-glass laminate of claim 7 wherein the alkyl acid phosphorus ester has an acid number above about 50.
Claim 9
Dependent Claim
18 words
The safety glass laminate of claim 7 wherein the alkyl acid phosphorus ester is an alkyl acid phosphate.
Claim 10
Dependent Claim
18 words
The safety glass laminate of claim 7 wherein the alkyl acid phosphorus ester is an alkyl acid phosphite.
Claim 11
Dependent Claim
15 words
The safety glass laminate of claim 10 wherein the alkyl phosphate is stearyl acid phosphate.
Claim 12
Dependent Claim
15 words
The safety glass laminate of claim 10 wherein the alkyl phosphate is octylphenyl acid phosphate.
Claim 13
Dependent Claim
15 words
The safety glass laminate of claim 10 wherein the alkyl phosphate is isooctyl acid phosphate.
Claim 14
Dependent Claim
15 words
The safety glass laminate of claim 10 wherein the alkyl phosphate is methyl acid phosphate.
Claim 15
Dependent Claim
15 words
The safety glass laminate of claim 10 wherein the alkyl phosphate is butyl acid phosphate.
Claim 16
Dependent Claim
16 words
The safety glass laminate of claim 10 wherein the alkyl acid phosphate is lauryl acid phosphate.
Claim 17
Dependent Claim
16 words
The safety glass laminate of claim 4 wherein the alkyl acid phosphate is lauryl acid phosphate.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |