Carbamate-functional polyester polymers or oligomers and...

Details Carbamate-functional polyester polymers or oligomers and... Carbamate-functional polyester polymers or oligomers and...

C - Chemistry, Metallurgy

08

G

C08G 63/685 (2006.01) C08G 63/668 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2165038

Polyester polymers having pendant carbamate groups are disclosed. The polymers are prepared by reacting: (a) reacting a hydroxyalkyl cyclic carbonate compound with a compound having at least one cyclic anhydride group to form a half-ester acid comprising a cyclic carbonate group, (b) reacting the cyclic carbonate group on the half-ester from step (a) with ammonia, ammonium hydroxide, or a primary amine to ring open the cyclic carbonate and form a compound comprising an acid group, a hydroxyl group, and a pendant carbamate group, and (c) reacting a mixture comprising the compound from step (b) and optionally comprising a polyol or a polyacid or both to form the polyester having pendant carbamate groups.

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