This invention, styling efficiency of the cosmetics formulation and the polymer and that composition which are suited for the improvement of the rheology, regards the use of the production method, and the aforementioned polymer and the aforementioned composition each one. Copolymer at least as a monomer A, the non ionicity ethylene characteristic unsaturated C1 - C4 (meta) acrylate of 1 kinds It is the ethylene characteristic unsaturated monomer which possesses non cyclic amide basis the ethylene characteristic unsaturated monomer B which possesses the amide basis as the hydrogen bond donor (as for ethylene characteristic unsaturated monomer B, ethylene which possesses cyclic amide basis as monomer B1, characteristic unsaturated monomer, and/or as monomer B2,) As a monomer C, at least the ethylene characteristic unsaturated carboxylic acid of 1 kinds Macro monomer D At least optionally building a bridge medicine E of 1 kinds Including the further monomer F of 1 kinds optionally, at least it becomes.本発明は、化粧品製剤のスタイリング性能およびレオロジーの向上に適したポリマー、その組成物、その製造方法、並びに前記ポリマーおよび前記組成物それぞれの使用に関する。コポリマーは、モノマーAとしての、少なくとも1種の非イオン性エチレン性不飽和C1~C4(メタ)アクリレート;アミド基を水素結合供与体として有するエチレン性不飽和モノマーB(エチレン性不飽和モノマーBは、モノマーB1としての、環式アミド基を有するエチレン性不飽和モノマー、および/またはモノマーB2としての、非環式アミド基を有するエチレン性不飽和モノマーである);モノマーCとしての、少なくとも1種のエチレン性不飽和カルボン酸;マクロモノマーD;任意に少なくとも1種の架橋剤E;任意に少なくとも1種の更なるモノマーFを含んでなる。
