| abstract |
Provided is a carboxyl group-containing water-soluble copolymer-containing viscous composition having good viscosity even when the amount of amino acid-based surfactant is more than the amount of betaine. More specifically, (A) at least 100 parts by mass of (meth) acrylic acid and 0.5 to 5 parts by mass of (meth) acrylic acid alkyl ester having 10 to 30 carbon atoms of the alkyl group are polymerized. It contains the obtained copolymer, (B) amino acid-based surfactant (C) betaine (D) alkyl glycoside, and (E) organic acid salt, and the content of (B) is equal to or greater than the content of (C). Some viscous compositions are provided. |