Patent ID: 6461536
Filing Date: 2002-10-08
Classification: C08G,C08J

Abstract:
A stable polyester polyol composition comprising:a) a phthalic anhydride-initiated polyester polyol, b) a blowing agent selected from the group consisting of C4-C6 hydrocarbons and mixtures thereof, and c) a compatibilizing agent having an HLB of from about 7 to about 12, said compatibilizing agent selected from the group consisting of oxyethylated fatty acids having a general formula of RnCOO(EO)xH, wherein Rn is a C14 to a C26 alkyl chain, EO represents an ethylene oxide unit and x is from 5 to 12, wherein said blowing agent is soluble in the polyol composition for at least 5 days.