Crosslinked acrylic polymer microparticles

摘要

Crosslinked acrylic polymer microparticles having a particle size of from 0.1 to 10 microns are produced in relatively high concentrations by a method comprising the free radical addition copolymerization of at least one monoethylenically unsaturated monomer with alpha, beta-ethylenically unsaturated monocarboxylic acid and crosslinking monomer selected from the group consisting of (1) epoxy group-containing compound and (2) a mixture of alkylenimine and organoalkoxysilane in the presence of a dispersion stabilizer and an aliphatic hydrocarbon dispersing liquid in which the crosslinked polymer particles are insoluble. The crosslinked acrylic polymer microparticles are useful as additives to protective and decorative coatings.