PROBLEM TO BE SOLVED: To provide a hair treating agent (1) easily preparable into a viscous formulation, (2) having excellent stability, (3) applicable uniformly onto hair with excellent operability and without dropping during operation, and (4) capable of imparting excellent functional characteristic without giving sticky feeling or starchy feeling to hair after operation.SOLUTION: The hair treating agent is constituted by including a copolymer of 2-acrylamide-2-methylpropane sulfonic acid or its salt, N, N-dimethyl acrylamide, and acrylic acid or its salt as a thickener. The hair treating agent is prepared preferably as an acidic hair dye, an oxidative hair dye or a curly hair straightening agent, especially preferably as the oxidative hair dye.COPYRIGHT: (C)2012,JPO&INPIT【課題】(1)容易に粘性の製剤に調製でき、(2)安定性に優れ、(3)施術中に垂れ落ちがなく、均一に毛髪に塗布できるので操作性が良く、(4)施術後の毛髪にべたつき感やごわつき感を与えず、優れた官能特性を付与することが可能な毛髪処理剤を提供する。【解決手段】2-アクリルアミド-2-メチルプロパンスルホン酸またはその塩とN,N-ジメチルアクリルアミドとアクリル酸またはその塩との共重合体を増粘剤として含有させて毛髪処理剤を構成する。上記毛髪処理剤は、酸性染毛料、酸化染毛剤、縮毛矯正剤として調製することが好ましく、特に酸性染毛料として調製することが好ましい。【選択図】なし
