Patent ID: 7390839

Claim:
A flame retardant polyurethane composition comprising: an alkyl substituted triaryl phosphate ester; a phosphorous-containing flame retardant having at least about 5 wt. % phosphorus selected from the group consisting of: tris(2-ethylhexyl) phosphate, resorcinol bis(diphenyl phosphate), tri-n-butyl phosphate, tri-isobutyl phosphate, and mixtures thereof, wherein the combined weight of the alkyl substituted triaryl phosphate ester and the phosphorus-containing flame retardant comprises about 5 to about 40% by weight of polyol, and wherein the ratio of the alkyl substituted triaryl phosphate ester to the phosphorus-containing flame retardant is from about 95:5 to about 80:20 percent by weight; and a flexible polyurethane foam reaction mixture including at least one polyol and at least one isocyanate.