REACTIVE OLIGOMERS FOR ISOCYANATE COATINGS

摘要

The invention is directed to a two-pack solvent-based ambient curable coatin g composition comprising a binder of a hydroxyl and cross-linking components. The hydroxyl component includes a linear or branch ed cycloaliphatic moiety-containing reactive oligomer or blend of oligomers with a weight average molecular weight not exceeding 3,00 0, a polydispersity not exceeding about 1.7 with at least 2 hydroxyl groups, at least 1, on average, being a primary hydroxyl group. The reactive oligomer is formed by the reaction of an oligomeric acid with monofunctional epoxy. The cross-linking component includes one or more of an oligomeric cross-linker containing at least 2 isocyanate groups. The coating composition of the invention is particularly suited in automotive refinish coatings.