CARBAMATE FUNCTIONAL POLYMERS AND COMPOSITIONS CONTAINING SAME

摘要

A novel polyester is provided comprising the reaction product of: (1) an aci d functional polyester which is prepared from: (a) a dihydroxycarboxylic acid of structure (I), wherein X is a lower alkyl group having from about 1 to about 4 carbon atoms, and R and R' are independently lower alkylene groups having fr om about 1 to about 4 carbon atoms; (b) a polyol different from (a); and (c) a polyacid; and (2) a monoepoxide containing from about 3 to 20 carbon atoms. The reaction product is carbamoylated. The carbamoylated polyester can be present in a film-forming composition also having a carbamate functional acrylic polymer and an aminoplast cross-linking agent. Also such a film- forming composition can be a clear coat in a multi-component composite coati ng composition.