| abstract |
An acrylic composition includes the reaction product of an acrylic polymer, a carbamate having anhydride-reactive functionality and carbamate functionality, and a carboxylic acid anhydride that is reactive with the carbamate to form a carboxylic acid carbamate. The acrylic polymer includes the reaction product of a functionalized monomer, a first compound reactive with the functionalized monomer to form a functionalized intermediate, and a highly branched, polyfunctional core molecule reactive with the functionalized intermediate. The first compound includes vinyl functionality reactive with the functionalized monomer and epoxy functionality. The carboxylic acid carbamate has the carbamate functionality and carboxylic acid functionality that is reactive with the acrylic polymer. The acrylic composition is highly-branched and, when used in coating compositions in combination with a suitable cross-linking agent, enhances recoat adhesion and produces cured films that have optimum scratch, mar, and chip performance, and acid etch resistance. |