US3989653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesters of tetrabromophthalic anhydride
Assignee: Zeneca Inc
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Filing: 1975-05-23
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Granted: 1976-11-02
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Expires: 1995-05-23
Abstract
Abstract Diesters comprising the reaction product of tetrabromophthalic anhydride and a polyhydroxy compound containing at least 3 hydroxyl groups are disclosed. The diesters are prepared, in one step, by reacting tetrabromophthalic anhydride with the polyhydroxy compound at a temperature of from about 130 DEG C. to about 190 DEG C. in the presence of an alkaline material. The diesters are especially useful in the preparation of fire-retardant, self-extinguishing, polyurethane foams.
Inventors
- 👤 James P. Baldino
- 👤 Joseph Feltzin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/42; C08G18/46; C08G18/4607; C08G18/5003; C08G18/5006; C08G18/5012; C08G18/65; C08G18/66; C08G18/6666
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A polyol blend comprising a simple diester of tetrabromophthalic anhydride and a polyhydric alcohol selected from the group consisting of trimethylol propane, pentaerythritol, glycerol, the reaction product of propylene oxide and sorbitol, the reaction product of ethylene oxide and sorbitol, arabitol, xylitol, adonitol, mannitol, dulcitol, sorbitol, 1,2,4-benzenetriol, phloroglucinol, 1,2,3,5-benzenetetrol, 1,2,4,5-benzenetetrol, and benzenehexol, wherein the molar ratio of polyhydric alcohol to tetrabromophthalic anhydride is equal to 2 to 1, and a condensate prepared by reacting an alkylene oxide with a polyhydric alcohol.
Claim 2
Dependent Claim
81 words
A polyol blend comprising a simple diester of tetrabromophthalic anhydride and a polyhydric alcohol selected from the group consisting of trimethylol propane, pentaerythritol, glycerol, the reaction product of propylene oxide and sorbitol, the reaction product of ethylene oxide and sorbitol, arabitol, xylitol, adonitol, mannitol, dulcitol, sorbitol, 1,2,4-benzenetriol, phloroglucinol, 1,2,3,5-benzenetetrol, 1,2,4,5-benzenetetrol, and benzenehexol, wherein the molar ratio of polyhydric alcohol to tetrabromophthalic anhydride is equal to 2 to 1, and a condensate prepared by reacting an alkylene oxide with a polyhydric alcohol.
Claim 3
Dependent Claim
21 words
A polyol blend, as claimed in claim 1, wherein the functionality of said blend is equal to at least about 3.
Claim 4
Dependent Claim
34 words
A polyol blend, as claimed in claim 1, wherein the amount of the simple diester is equal to from about 50% to about 60% by weight based on the total weight of said blend.
Claim 5
Dependent Claim
28 words
A polyurethane foam-forming composition comprising: a. a polyol blend as claimed in claim 1, b. an isocyanate, c. a catalyst, d. a blowing agent, and e. a surfactant.
Claim 6
Dependent Claim
14 words
A foam-forming composition, as claimed in claim 4, further including an organic phosphorus-containing compound.
Claim 7
Dependent Claim
45 words
A composition, as claimed in claim 5, wherein the phosphorus-containing compound is a composition comprising about 86% by weight of the reaction product of 4 mols of propylene oxide and one mol of dibutyl phosphoric acid and about 32% by weight of dimethyl methyl phosphonate.
Claim 8
Dependent Claim
52 words
A composition, as claimed in claim 5, wherein the phosphorus-containing compound is a phosphonate having the following formula: ##STR2## wherein R and R 1 are selected from the group consisting of allyl, lower alkyl, and lower haloalkyl radicals and R 2 , R 3 , and R 4 are lower alkylene radicals.
Claim 9
Dependent Claim
23 words
A fire-retardant, self-extinguishing, polyurethane foam comprising the reaction product of a. a polyol blend as claimed in claim 1, and b. an isocyanate.
References Cited (Backward Citations)
US3285995A
Cited
US3676376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |