Synthetic resin emulsion, process for producing it and coating compositions comprising it.

摘要

A synthetic resin emulsion, whose polymer particles are solid core-shell particles in which pores form spontaneously upon drying, is produced by (1) preparing core particles from 2 to 60 parts by weight of polymer (A) by emulsion polymerization of from 10 to 80 parts by weight of acrylate ester (a1) having an alkyl group of from 1 to 3 carbon atoms and from 90 to 20 parts by weight of another vinyl-type monomer (a2) copolymerizable therewith, (2) forming a shell of a polymer B) on the surface of the core particles of polymer (A) by emulsion polymerization in the presence thereof of from 98 to 40 parts by weight of vinyl-type monomer (b), different from monomer (a1) and, (3) successively hydrolyzing the core portion of the particles, usually with an alkaline material. Organic pigments prepared from the synthetic resin emulsion can improve the hiding power, brightness, gloss and other properties of articles coated therewith.