| abstract |
(57) [Summary] [Purpose] A new water-retaining agent for paper-coating paints that enhances the concentration and high-speed coating of paper-coating paints, has excellent coating suitability, and improves the quality of coated papers. To get. [Structure] 10 to 75 parts by weight of a monomer (1) consisting of (meth) acrylic acid ester having 25 to 90 parts by weight of methacrylic acid and (2) an alkyl group having 6 to 22 carbon atoms in 100 parts by weight of total monomers. Part as an essential constituent, and other ethylenically unsaturated monomer B0 to 50 copolymerizable with them For a paper coating composition obtained by emulsion polymerization of a monomer mixture consisting of 1 part by weight and a monomer B / monomer A weight ratio of 5 or less in the presence of 1 to 25 parts by weight of an anionic emulsifier. A composition for paper-coating paint, comprising a water-holding agent and a water-retaining agent for the paper-coating paint, which is mixed with the paper-coating paint. |