Patent ID: 6303669
Filing Date: 2001-10-16
Classification: C08G,H04R

Abstract:
A flexible polyurethane foam obtained by the reaction of a composition comprising:(a) a polyisocyanate, and(b) a polyol component comprising a polyether polyol and a polyester polyol, said polyester polyol having a total number of hydrocarbon groups ""n"" between ester moieties, such that at least n/3 of said hydrocarbon groups have 5 or more carbon atoms, said polyester polyol being prepared by one of the following reactions:(i) reacting a long-chain polyvalent alcohol with a long-chain dibasic acid;(ii) reacting a long-chain polyvalent alcohol with a short-chain dibasic acid; or(iii) reacting a short-chain polyvalent alcohol with a long-chain dibasic acid;wherein the following definitions apply to reactions (i), (ii) and (iii): the long-chain polyvalent alcohol is a polyvalent dimer diol having a hydrocarbon group having at least 5 carbon atoms; the short-chain polyvalent alcohol is a polyvalent alcohol having a hydrocarbon group having not more than 4 carbon atoms; the long-chain dibasic acid is a dibasic dimeric acid having a hydrocarbon group having at least 5 carbon atoms; and the short-chain dibasic acid is a dibasic acid having a hydrocarbon group having not more than 4 carbon atoms.