Patent ID: 7241830

Claim:
A thermosetting film-forming composition that is substantially free of organic solvent, said composition comprising (a) a resinous binder system comprising a reactive functional group-containing polymer, (b) a crosslinking agent having functional groups reactive with the functional groups of the polymer, and (c) an aqueous dispersion of crosslinked polymeric microparticles prepared by emulsion polymerization of a monomeric composition comprising: (1) at least 10 percent by weight of one or more vinyl aromatic compounds; (2) 0.1 to 10 percent by weight of one or more carboxylic acid functional polymerizable, ethylenically unsaturated monomers; (3) one or more polymerizable monomers having one or more functional groups which are capable of reacting to form crosslinks; and (4) one or more polymerizable ethylenically unsaturated monomers, where the weight percentages are based on total weight of monomers present in the monomeric composition; wherein each of (1), (2), (3) and (4) are different one from the other.