U.S. 8,173,751 B2
Kusumoto Chemicals, Ltd.  has obtained a patent for a method for imparting defoaming property to a baking finish type topcoat 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 comprised of the step of adding a copolymer of 2%-50% by weight of a polymerizable monomer capable of forming a copolymer having isocyanate groups which can react with a binder resin in thermosetting paint or 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 other monomer or polymer reactable with the polymerizable monomer or to the topcoat paint.