High temperature resistant foams

Details High temperature resistant foams High temperature resistant foams

C - Chemistry, Metallurgy

08

J

403/14

C08J 9/04 (2006.01) C08G 18/00 (2006.01) C08G 18/04 (2006.01) C08G 18/08 (2006.01) C08G 18/58 (2006.01) H01B 3/30 (2006.01)

Patent

CA 2028678

Mo3484 LeA 27,224 HIGH TEMPERATURE RESISTANT FOAMS ABSTRACT OF THE DISCLOSURE The invention relates to high temperature resistant foams prepared by partially reacting an organic polyisocyanate with an epoxide having at least two epoxide groups in quantities such that the equivalent ratio of isocyanate groups to epoxide groups is from 1.2:1 to 500:1 in the presence of a tertiary amine catalyst; adding an alkylating sulfonic acid alkyl ester, methyl iodide, or dimethyl sulfate to terminate the reaction when no more than about 60% of the isocyanate groups have reacted; and foaming the resultant stable intermediate mixture by adding a chemical and/or physical blowing agent and a catalyst that accelerates the reaction of isocyanate and epoxide groups. Mo3484

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