Patent ID: 8173751

Claim:
A method for imparting defoaming property to a baking finish type top coat paint containing an acid anhydride curing agent, a melamine resin curing agent or a glycidyl-containing acrylic resin/acid anhydride curing agent for motor vehicles, comprising the step of: adding a copolymer of 2-50% by weight of (A) a polymerizable monomer capable of forming a copolymer having isocyanate groups which can react with a binder resin in thermosetting paint or (B) a polymerizable monomer capable of forming a copolymer having groups capable of producing isocyanate groups which can react with a binder resin in thermosetting paint during baking step of the same paint, and 98-50% by weight of (C) other monomer or polymer reactable with said polymerizable monomer (A) or (B) to the top coat paint.