Against 100 wt%, a) a monomer unit derived from a monomer containing 70% or more and 98.5% or less of the mass ratio of the strong acid functional group, b) 0.5% or more and 10% or less by mass ratio, formula (1a): R- (CH 2) 3-Si (CH 3) 2- [O-Si (CH 3) 2-] n O-Si (CH 3) 2 - (CH 2) 3 -R (1a monomer of representing the yO-C (= O) -CH = CH 2) -) (wherein, R is a monovalent radical :-( O-CH2-CH2-) x [O-CH 2 -CH (CH3)] , or formula (Ib): Si (CH 3) 3 - [O-Si (CH 3) 2-] m [O-Si (CH 3) [(CH 2) 3 -R] -] p O-Si ( CH 2) 3 (monomers Ib), c) the formula (II 1% or more and 20% or less by mass ratio): CH 2 = CH (R1) -C (= O) -O- (CH 2) n- CF 3 (II) (in the formula (I), the radical Ri is a hydrogen atom or a methyl radical, n is equal to 1, 2 or 3) monomers, d) optionally, 0% ultra and 5% of the mass The ratio of formula (III): R 2 -C (= O) -O - [(CH 2 -CH (R 4) -O] m-R 3 monomer units derived from monomer (III), e) optionally anionic polymer electrolyte obtained by polymerization of a crosslinking monomer from 0% ultra and 5% of the mass ratio, a method of preparing them their use as thickeners, and topical compositions. .BACKGROUND100質量%に対して、a)70%以上かつ98.5%以下の質量比の強酸官能基を含むモノマーに由来するモノマー単位、b)0.5%以上かつ10%以下の質量比の、式(1a):R-(CH2)3-Si(CH3)2-[O-Si(CH3)2-]nO-Si(CH3)2-(CH2)3-R(1a)(式中、Rは一価ラジカル:-(O-CH2-CH2-)x[O-CH2-CH(CH3)-]yO-C(=O)-CH=CH2を表す)のモノマー、又は式(Ib):Si(CH3)3-[O-Si(CH3)2-]m[O-Si(CH3)[(CH2)3-R]-]pO-Si(CH2)3(Ib)のモノマー、c)1%以上かつ20%以下の質量比の式(II):CH2=CH(R1)-C(=O)-O-(CH2)n-CF3(II)(式(I)中、ラジカルRiは水素原子又はメチルラジカルを表し、nは1、2又は3に等しい)のモノマー、d)任意で、0%超かつ5%以下の質量比の式(III):R2-C(=O)-O-[(CH2-CH(R4)-O]m-R3(III)のモノマーに由来するモノマー単位、e)任意で、0%超かつ5%以下の質量比の架橋モノマーの重合によって得られるアニオン性高分子電解質、それを調製する方法、及び局所組成物の増粘剤としてのその使用。【選択図】なし
