| abstract |
(57) [Summary] [Structure] 3% by weight or more of repeating unit having a hydrophilic side chain; 0 to 97% by weight of repeating unit having a hydrophobic side chain And a number-average molecular weight of 2, which is 0 to 70% by weight of repeating units derived from other α, β-ethylenically unsaturated monomers. Polymer emulsifier for emulsion polymerization in the range of 000-200,000. [Effect] A polymer emulsifier having a good dispersibility capable of obtaining a high-concentration emulsion containing polymer particles having a fine particle diameter suitable for an aqueous coating composition is provided. |