PROBLEM TO BE SOLVED: To provide a cosmetic composition that contains an amphoteric artificial copolymer and that is appropriate for the treatment of the skin or the hair.SOLUTION: The cosmetic composition includes a water surfactant as required, and an amphoteric copolymer expressed by general formula (1). In the formula, R1 is a hydrogen atom or a methyl or an ethyl group R2, R3, R4, R5, and R6 are the same or different linear or branched 1-6C alkyl, hydroxyalkyl or aminoalkyl groups m is 0-10 n is an integer of 1-6 Z is -C(O)O- or -C(O)NH- group or an oxygen atom A is the group (CH2)p (p is 1-6, desirably an integer of 2-4) B is a linear or branched 2-12C polymethylene chain that may be interrupted by one or more hetero atoms or hetero groups and also that may be substituted by one or more hydroxy or amino groups and X- shows the same or different counter ions.COPYRIGHT: (C)2013,JPO&INPIT【課題】両性人工共重合体を含む、肌又は毛髪の処理に適した化粧用組成物の提供。【解決手段】水と、随意に界面活性剤と、下記一般式であらわされる両性共重合体とを含む化粧用組成物。(式中、R1は、水素原子又はメチル若しくはエチル基であり;R2、R3、R4、R5及びR6は、同一又は異なってもよく、直鎖状又は分枝状のC1~C6のアルキル、ヒドロキシアルキル又はアミノアルキル基であり、mは0~10であり;nは1~6の整数であり;Zは-C(O)O-若しくは-C(O)NH-基又は酸素原子を表し;Aは基(CH2)p(pは1~6、好ましくは2~4の整数である)を表し;Bは1以上のヘテロ原子又はヘテロ基で中断されていてよく且つ1以上のヒドロキシル又はアミノ基で置換されていてされていてよい、直鎖状又は分枝状のC2~C12のポリメチレン鎖を表し;X-は同一又は異なってもよく、対イオンを表す。)【選択図】なし
