METHOD FOR PREPARING COLOR-CLEAR COMPOSITE COATINGS HAVING RESISTANCE TO ACID ETCHING

摘要

A color-plus-clear coating system is disclosed. A pigmented or coloredbasecoat is first applied to a substrate followed bythe application of a transparent topcoat to the basecoat. The transparenttopcoat composition is a crosslinkable compositioncomprising (1) a material containing a plurality of carbamate and/or ureafunctional groups and (2) an aminoplast crosslinkingagent. The topcoat composition provides a composite coating with improved acidetch resistance, making the composite coatingparticularly useful as an automotive topcoat.