Rigid polyurethane foams

Details Rigid polyurethane foams Rigid polyurethane foams

C - Chemistry, Metallurgy

08

J

C08J 9/02 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08J 9/00 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2210304

Process for the preparation of open celled rigid polyurethane foams comprising the step of reacting an organic polyisocyanate with an isocyanate-reactive material in the presence of a blowing promoter which is an isocyanate/ reactive cyclic carbonate or cyclic urea, and in the presence of an insoluble fluorinated organic liquid and a metal salt catalyst wherein the insoluble fluorinate organic liquid is a perfluorinated acyclic unsaturated organic compound.

La présente invention concerne un procédé de préparation de mousses de polyuréthanne rigides à alvéoles ouvertes qui consiste à faire réagir un polyisocyanate organique avec une matière réagissant avec l'isocyanate, en présence d'un agent promoteur de gonflement qui est un carbonate cyclique ou une urée cyclique réagissant avec l'isocyanate, et en présence d'un liquide organique fluoré insoluble et d'un catalyseur de sel métallique, le liquide organique fluoré insoluble étant un composé organique insaturé acyclique perfluoré.

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