| 摘要 |
PURPOSE:To produce the titled aqueous dispersion having excellent film-forming property, by polymerizing a specific hydrophilic monomer with another polymerizable monomer in a water-soluble organic solvent, and adding water to the obtained vinyl copolymer resin solution to effect the dispersion of the resin. CONSTITUTION:A stable dispersion is produced by dissolving (A) 1-15pts.(wt.), preferably 2-10pts. of a hydrophilic monomer of formula (R1 and R2 are H, 1-4C alkyl or phenyl; R3 is 5-20C alkyl) wherein the average molecular weight of the polyoxyethylene group is 1,500-15,000, preferably 2,000-10,000 in a water-soluble organic solvent (e.g. methyl ethyl ketone), adding a radical initiator and (B) 99-85pts., preferably 98-90pts. of another polymerizable vinyl monomer [e.g. methyl (meth)acrylate] dropwise to the solution under heating and agitation to effect the polymerization of the monomers, heating the resultant solution at 50-100 deg.C and adding water dropwise to the hot solution under vigorous agitation.
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