Diesters of tetrabromophthalic anhydride
AssigneeICI United States Inc.
InventorsJames P. Baldino, Joseph Feltzin
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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.degree. C. to about 190.degree. C. in the presence of an alkaline material. The diesters are especially useful in the preparation of fire-retardant, self-extinguishing, polyurethane foams.
Claims8
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.
Dependencies are inferred from the claim text.