High solids acrylic dispersion lacquer

Claim 1

A high solids acrylic dispersion lacquer coating composition having an acrylic polymer binder content of about 25-45% by weight in a nonaqueous medium; wherein the acrylic polymer binder consists essentially of about (1) 25-45% by weight, based on the weight of the binder, of Polymer A comprising about 90-99.5% by weight, based on the weight of Polymer A, of polymerized methyl methacrylate and about 0.1-5% by weight, based on the weight of Polymer A, of polymerized allyl methacrylate and 0.4-5% by weight, based on the weight of Polymer A, of polymerized alkyl amino alkyl methacrylate and having a weight average molecular weight, measured by gel permeation chromatography, of about 90,000-130,000; (2) 5-25% by weight, based on the weight of the binder, of Copolymer B comprising about 40-60% by weight, based on the weight of Copolymer B, of polymerized methyl methacrylate and 40-60% by weight, based on the weight of Copolymer B, of polymerized alkyl acrylate having 6-12 carbon atoms in the alkyl group and having a weight average molecular weight, measured as above, of about 20,000-40,000; and (3) 40-60% weight, based on the weight of the binder, of a graft copolymer of Polymer A which forms a backbone of the graft copolymer and Copolymer B attached to the backbone which forms side chains of the graft copolymer; and wherein the nonaqueous medium comprises (a) an aliphatic solvent which is at 25° C. a nonsolvent for Polymer A and a solvent for Copolymer B; and (b) a coalescing solvent which at 50° C. and above is a solvent for the binder and at 25° C. is a nonsolvent for the binder.