Patent US4051082A successfully refreshed from Google Patents.
US4051082A
Expired / Lapsed
US
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Carbodiimide-isocyanurate foams modified with ethoxylated polyols
Assignee: BASF Corp
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Filing: 1976-02-02
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Granted: 1977-09-27
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Expires: 1996-02-02
Abstract
Abstract Rigid cellular foams are prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting catalyst, (b) a trimerization catalyst, (c) a urethane catalyst, and (d) from 10 parts to 40 parts per 100 parts of polyisocyanate of a polyol mixture comprising (1) from 5 parts to 30 parts of a polyoxyethylated polyhydric alcohol and (2) from 5 parts to 25 parts of a polyoxyethylated phosphate polyol.
Inventors
- 👤 Moses Cenker
- 👤 Peter Tai-Yuen Kan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/08; C08G18/09; C08G18/095; C08G18/50; C08G18/5075; C08G18/5081; C08G18/5084; C08G2110/00; C08G2110/0025; C08G2115/00; C08G2115/02; C08G2115/06; Y; Y10; Y10S; Y10S521/00; Y10S521/901; Y10S521/902
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
99 words
A cellular foam characterized by carbodiimide, isocyanurate and urethane linkages prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting catalyst; (b) a trimerization catalyst; (c) a urethane catalyst, and (d) from 10 parts to 40 parts by weight per 100 parts by weight of polyisocyanate of a polyol mixture comprising (1) from 5 parts to 30 parts of a polyoxyethylated polyhydric alcohol and (2) from 5 parts to 25 parts of an ethoxylated acid of phosphorus, said acid having a P 2 O 5 equivalency of from about 72% to about 95% by weight.
Claim 2
Dependent Claim
99 words
A cellular foam characterized by carbodiimide, isocyanurate and urethane linkages prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting catalyst; (b) a trimerization catalyst; (c) a urethane catalyst, and (d) from 10 parts to 40 parts by weight per 100 parts by weight of polyisocyanate of a polyol mixture comprising (1) from 5 parts to 30 parts of a polyoxyethylated polyhydric alcohol and (2) from 5 parts to 25 parts of an ethoxylated acid of phosphorus, said acid having a P 2 O 5 equivalency of from about 72% to about 95% by weight.
Claim 3
Dependent Claim
18 words
The foam of claim 1 wherein the polyoxyethylated polyhydric alcohol is an ethylene oxide adduct of ethylene glycol.
Claim 4
Dependent Claim
17 words
The foam of claim 1 wherein the polyoxyethylated polyhydric alcohol is an ethylene oxide adduct of trimethylolpropane.
Claim 5
Dependent Claim
20 words
The foam of claim 1 wherein the ethoxylated acid of phosphorus is an ethylene oxide adduct of 100% phosphoric acid.
Claim 6
Dependent Claim
20 words
The foam of claim 1 wherein the ethoxylated acid of phosphorus is an ethylene oxide adduct of 115% phosphoric acid.
Claim 7
Dependent Claim
27 words
The foam of claim 1 wherein the organic polyisocyanate is selected from the group consisting of toluene diisocyanate, methylene diphenyl diisocyanate, polyphenyl polymethylene polyisocyanate and mixtures thereof.
Claim 8
Dependent Claim
12 words
The foam of claim 1 wherein the carbodiimidepromoting catalyst is furfuryl alcohol.
Claim 9
Dependent Claim
11 words
The foam of claim 1 wherein the trimerization catalyst is 1,3,5-tris(N,N-dimethylaminopropyl)-s-hexahydrotriazine.
Claim 10
Dependent Claim
12 words
The foam of claim 1 wherein the urethane catalyst is dibutyltin diacetate.
Claim 11
Dependent Claim
15 words
The foam of claim 1 carried out in the presence of a fluorocarbon blowing agent.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |