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US 5,475,064 AGranted
Carbamate-functional polyester polymer or oligomer and coating composition
AssigneeBASF SE
InventorsGregory L. Menovcik, Walter H. Ohrbom
Life of this patent
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Abstract
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.
Claims3
A curable coating composition comprising:
- (1) a polyester that is the reaction product of a mixture comprising:
- (a) a dihydric alcohol having a carbamate group appended thereto, and
- (b) a polyacid, and
- (2) a curing agent having a plurality of groups that are reactive with carbamate.
1 more element
Dependencies are inferred from the claim text.