PROBLEM TO BE SOLVED: To provide a cosmetic excellent in moisture retention effect, its persistence and use feeling.SOLUTION: A cosmetic contains a polymer having a repeating unit having a sulfinyl group in a side chain, as an active ingredient. A preferred polymer is represented by the formula (2) [in the formula, R1 represents a hydrogen atom or a methyl group, R2 represents a group -O-, a group *-(C=O)-O- (* represents a position at which R1 in the formula (2) is bonded to a carbon atom) and the like, R3 represents a direct bond or a divalent organic group having a carbon number of 1 to 24, and R4 represents an organic group having a carbon number of 1 to 10].COPYRIGHT: (C)2014,JPO&INPIT【課題】保湿効果、その持続性及び使用感に優れた化粧料の提供。【解決手段】スルフィニル基を側鎖に有する繰り返し単位を有する重合体を有効成分として含有する化粧料。好ましい重合体は、次式(2)[式中、R1は、水素原子またはメチル基を示し、R2は、基-O-、基*-(C=O)-O-(*は、式(2)中のR1が結合している炭素原子と結合する位置を示す)等を示し、R3は、直接結合または炭素数1~24の2価の有機基を示し、R4は、炭素数1~10の有機基を示す。〕で示される。【選択図】なし
