Patent ID: 7521085
Filing Date: 2009-04-21
Classification: B82Y,C01P,C08F,C08K,C08L,C09C,C09D

Abstract:
1. A method of preparing a coating composition, comprising: (a) preparing a mixture of water, a portion of addition polymerizable monomer or monomers, and a particulate pigment having primary aggregate particles; (b) emulsion polymerizing the portion of addition polymerizable monomer or monomers to produce an addition polymer, wherein the portion of addition polymerizable monomer or monomers is selected so that the addition polymer has a glass transition temperature of at least about 60° C. and encapsulates the pigment particles to form encapsulated pigment particles; (c) removing the encapsulated pigment particles from the water to form a dry, particulate, encapsulated pigment product; and (d) combining the pigment product with a vehicle comprising at least one resin, at least one crosslinker for the resin, and at least one member selected from the group consisting of water and organic liquids to form a coating composition.