| abstract |
(57) [Summary] [Object] To provide a polymer emulsifier suitable for producing an aqueous resin emulsion having excellent water resistance by emulsion polymerization. [Structure] Copolymerization of (a) a macromonomer having a (meth) acryloyl group at one end of a silicone molecule, (b) an α, β-ethylenically unsaturated carboxylic acid, and (c) another radically polymerizable monomer. A polymer emulsifier comprising a water-soluble graft copolymer obtained by neutralizing a part or all of the carboxyl groups in the resulting graft copolymer with a base. |