Polyisocyanate-modified dicarboxylic (poly)anhydrides

Details Polyisocyanate-modified dicarboxylic (poly)anhydrides Polyisocyanate-modified dicarboxylic (poly)anhydrides

C - Chemistry, Metallurgy

07

C

C07C 271/08 (2006.01) C07D 251/34 (2006.01) C08G 18/34 (2006.01) C08G 18/58 (2006.01) C08G 18/64 (2006.01) C09D 163/00 (2006.01)

Patent

CA 2154981

Polyisocyanate-modified dicarboxylic (poly)anhydrides which are solid below 40°C, liquid above 120°C and based on the reaction product of organic polyisocyanates with more than equivalent quantities, based on the NCO/COOH reaction, of dicarboxylic (poly)anhydrides containing free carboxyl groups and optional subsequent modification of the reaction product with less than equivalent quantities, based on the anhydride groups, of anhydride-reactive amino and/or hydroxyl groups; and powder coating compositions containing as binder these polyisocyanate-modified dicarboxylic (poly)anhydrides as curing agents for polyepoxides.

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