PROBLEM TO BE SOLVED: To provide a viscous composition that shows excellent viscosity in high salt concentration.SOLUTION: This invention provides a viscous composition comprising an alkyl-modified carboxyl group-containing water-soluble copolymer obtained by polymerization of 100 pts. mass of (meth) acrylic acid, 0.1 pt. mass or more and 2 pts. mass or less of (meth) acrylic acid alkyl ester in which an alkyl group has 18-24 carbon atoms, and 0-0.1 pt. mass of a compound having two or more ethylenically unsaturated groups, and a urethane associated polyalkylene oxide modified product.COPYRIGHT: (C)2016,JPO&INPIT【課題】高い塩濃度下で優れた粘性を示す粘性組成物を提供すること。【解決手段】(メタ)アクリル酸100質量部と、アルキル基の炭素数が18~24である(メタ)アクリル酸アルキルエステル0.1質量部以上2質量部未満と、エチレン性不飽和基を2個以上有する化合物0~0.1質量部とを重合させて得られるアルキル変性カルボキシル基含有水溶性共重合体とウレタン会合型ポリアルキレンオキシド変成物を含有する粘性組成物。【選択図】なし
