PROBLEM TO BE SOLVED: To provide an aqueous hair detergent by which volume feeling can be obtained in hair after drying by making it possible to easily separating each hair in a drying process of wet hair and raising the root of the hair.SOLUTION: The aqueous hair detergent contains following components (A) to (D): (A) anionic surfactant (B) cationized galactomannan (C) elastic solid particle and (D) cationic group containing copolymer obtained by copolymerizing monomer mixture containing monomers (a1), (a2), (a3) having specific structures. The monomer (a1) is at least one hydrophilic nonionic group containing vinyl monomers represented by a formula (I). The monomer (a2) is at least one cationic group containing vinyl monomers represented by a specific general formula, and the monomer (a3) is a crosslinkable vinyl monomer having two or more reactive unsaturated groups. In the formula, R1 represents a hydrogen atom or a methyl group, R2 represents a hydrogen atom or a 1-4C linear or branched alkyl group or alkenyl group, R3 represents a 1-4C linear or branched alkyl group or alkenyl group.COPYRIGHT: (C)2012,JPO&INPIT【課題】濡れた毛髪の乾燥過程において、毛髪を1本1本ばらけ易くし、毛髪の根元を立ち上げ、乾燥後の毛髪にボリューム感が得られる水性毛髪洗浄剤の提供。【解決手段】次の成分(A)~(D)を含む水性毛髪洗浄剤。(A)アニオン性界面活性剤、(B)カチオン化ガラクトマンナン、(C)弾性固体粒子、(D)特定の構造を有する単量体(a1)、(a2)、(a3)を含有するモノマー混合物を共重合することにより得られるカチオン性基含有共重合体。単量体(a1):式(I)等で表される親水性ノニオン性基含有ビニル単量体の少なくとも1種単量体(a2):特定の一般式で表されるカチオン性基含有ビニル単量体の少なくとも1種(a3):2個以上の反応性不飽和基を有する架橋性ビニル単量体【選択図】なし
