ENVIRONMENTAL ETCH RESISTANT, TWO-COMPONENT, COATING COMPOSITION, METHOD OF COATING THEREWITH, AND COATING OBTAINED THEREFROM

摘要

A two component composition adapted to be applied onto a substrate comprises at least one crosslinker having a functionality thereon, which reacts with a functionality on at least one film-forming polymer present in a separate component of the composition. Said crosslinking agent comprises at least one member selected from the group consisting of: (1) an isocyanurate of isophorone diisocyanate; (2) a derivative of an isocyanurate of isophorone diisocyanate; (3) a biuret of isophorone diisocyanate; (4) a derivative of a biuret of isophorone diisocyanate. The composition preferably comprises a blend of this crosslinker with a second crosslinker, wherein the second crosslinking agent is at least one member selected from the group consisting of: (1) an isocyanurate of hexamethylene diisocyanate; (2) a derivative of an isocyanurate of hexamethylene diisocyanate; (3) a biuret of hexamethylene diisocyanate; (4) a derivative of a biuret of hexamethylene diisocyanate. The invention also relates to a substrate using a coating method of the composition, and a cured coating formed by the method of the invention.