US3773696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrabromo ether diol as a flame-retardant for polyurethane foams
Assignee: Lyondell Chemical Technology LP
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Filing: 1971-08-16
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Granted: 1973-11-20
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Expires: 1991-08-16
Abstract
Abstract This invention is directed to the new compound, 2,3dihydroxyprop-1-yl 2,3,7,8-tetrabromooct-1-yl ether, and to flame-retarded polymeric compositions having said compound incorporated therein. The tetrabromooctyl ether diol is employed with particular advantage in the formation of flame-retarded cellular polyurethanes including self-extinguishing flexible foams.
Inventors
- 👤 A Papa
- 👤 W Proops
- 👤 T Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3802; C08G18/3804; C08G18/3806; C08G18/381
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A flame-retarded polyurethane foam produced by the method which comprises reacting and foaming a reaction mixture containing: (1) an organic polyisocyanate, (2) a polyether polyol, (3) a flame-retardant comprising 2,3-dihydroxyprop-1-yl 2,3,7,8-tetra-bromooct-1-yl ether, (4) a blowing agent, and (5) a catalyst for the polyurethane-forming reaction, said flame-retardant being present in said reaction mixture in an amount sufficient to provide in said polyurethane product a bromine content of between about 1 and about 20 weight percent, based on the combined weight of (1), (2) and (3).
Claim 2
Dependent Claim
15 words
A polyurethane foam as defined in claim 2 in which the blowing agent is water.
Claim 3
Dependent Claim
102 words
A flame-retarded flexible polyurethane foam produced by the method which comprises reacting and foaming a reaction mixture containing: (1) a tolylene diisocyanate, (2) a polyether polyol having a hydroxyl number between about 32 and about 150, (3) a flame-retardant comprising 2,3-dihydroxyprop-1-yl 2,3,7,8-tetrabromooct-1-yl ether, (4) a blowing agent comprising water, (5) an amine catalyst for the polyurethane-forming reaction, and (6) a foam stabilizer, said flame-retardant being present in said reaction mixture in an amount sufficient to provide in said polyurethane product a bromine content of between about 1.5 and about 10 weight percent, based on the combined weight of (1), (2) and (3).
Claim 4
Dependent Claim
24 words
A flame-retarded flexible polyurethane foam as defined in claim 4 in which said reaction mixture additionally contains a tin carboxylate as a supplementary catalyst.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |