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 63/42 (2006.01) C09D 167/00 (2006.01)

Patent

CA 2165023

Polyester polymers having pendant carbamate groups are disclosed. The polymers are prepared by: (a) reacting a hydroxyalkyl cyclic carbonate with ammonia, ammonium hydroxide, or a primary amine to form a dihydric alcohol having a carbamate group appended thereto, (b) reacting the dihydric alcohol from (a) and a cyclic anhydride to form a half-ester diacid having a carbamate group appended thereto, and (c) reacting a mixture comprising the half-ester diacid from step (b) and a polyol to form a polyester having carbamate groups appended thereto.

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