Process for making isocyanate-based rigid foam

Details Process for making isocyanate-based rigid foam Process for making isocyanate-based rigid foam

C - Chemistry, Metallurgy

08

L

C08L 67/00 (2006.01) C08J 9/14 (2006.01) C08K 5/01 (2006.01) C08K 5/103 (2006.01) C08L 75/06 (2006.01)

Patent

CA 2259500

A stable polyester polyol composition is provided comprising a phthalic anhydride-initiated polyester polyol, a blowing agent selected from the group consisting of C4-C6 hydrocarbons and mixtures thereof, and a compatibilizing agent having an HLB of from about 7 to 12. The compatibilizing agent is selected from the group consisting of oxyethylated fatty acids having a general formula of R n COO(EO)x-H, wherein R n is a C14 to a C26 alkyl chain, EO represents an ethylene oxide unit and x is from 5 to 12. The blowing agent is soluble in the polyol composition for at least 5 days. An isocyanate-based rigid foam and process of making the same are also provided, wherein the isocyanate-based rigid foam comprises the reaction product of a stable polyester polyol composition of the invention with an organic and/or modified organic polyisocyanate.

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