Preparation process of heat-resistant polymers

Details Preparation process of heat-resistant polymers Preparation process of heat-resistant polymers

C - Chemistry, Metallurgy

08

J

402/217

C08J 9/00 (2006.01) C08G 18/08 (2006.01) C08G 18/16 (2006.01) C08G 18/18 (2006.01) C08G 18/22 (2006.01) C08G 18/34 (2006.01)

Patent

CA 1258945

ABSTRACT Disclosed herein is a process for preparing heat-resistant polymers by reacting an organic polyisocyanate with one or more compounds selected from the group consisting of organic polycarboxylic acids and organic polycarboxylic acid anhydrides in the presence of an alkali metal fluoride or an alkali metal fluoride combined with a quaternary onium salt as a catalyst.

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