| 摘要 |
PURPOSE:A stable emulsion polymer composition having a high resin content and a low viscosity, prepared by emulsion-polymerizing a radical-polymerizable monomer in an emulsion obtained by emulsion-polymerizing a radical-polymerizable monomer in an aqueous medium. CONSTITUTION:An emulsion polymer composition having a resin content >=60wt% obtained by emulsion-polymerizing a radical-polymerizable monomer in a polymer emulsion comprising polymer particles of an average diameter >=0.1mu obtained by emulsion-polymerizing a radical-polymerizable monomer in an aqueous medium. As the radical-polymerizable monomer used in the emulsion polymerization in the 1st step, a monomer based on a (meth)acrylate ester is preferable. As the radical-polymerizable monomer used in the emulsion polymerization in the 2nd step, a monomer based on (meth)acrylic acid as used in the emulsion polymerization in the 1st step is preferable from the viewpoint of the mechanical stability, low viscosity, etc., of the formed emulsion polymer, and it is more desirable to used a monomer based on an acrylate ester as the monomer.
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