PROBLEM TO BE SOLVED: To provide a new reversed-phase latex of a copolymer comprising AMPS (2-acrylamido-2-methylpropanesulfonic acid) and N,N-dimethyacrylamide, and the application thereof for cosmetics.SOLUTION: This reversed-phase latex is a composition in the form of a reversed-phase latex comprising an oil phase, an aqueous phase, at least one emulsion phase of a water-in-oil (W/O) type, and optionally at least one emulsion phase of an oil-in-water (O/W) type, and comprising 20 to 70% by mass, preferably 25 to 50% by mass of a branched or cross-linked polymer electrolyte, wherein the polymer electrolyte is a copolymer comprising 2-acrylamido-2-methylpropanesulfonic acid which is partially or wholly converted to a salt, N,N-dimethylacrylamide, and optionally one or more monomer selected from the group consisting of a monomer containing a weak acid functional group which is partially or wholly converted to a salt and a neutral monomer. This composition is used for cosmetics.COPYRIGHT: (C)2007,JPO&INPIT【課題】AMPSおよびN,N-ジメチルアクリルアミドのコポリマーの新規な逆相ラテックスおよびその化粧品のための用途を提供すること。【解決手段】油相、水相、少なくとも1種の油中水(W/O)タイプの乳化系、任意に水中油(O/W)型の少なくとも一種の乳化系を含み、20~70質量%、好ましくは25~50質量%の分枝または架橋高分子電解質を含む逆相ラテックスの形態にある組成物であって、前記高分子電解質が、部分的または全体的に塩とされた2-アクリルアミド-2-メチルプロパンスルホン酸と、N,N-ジメチルアクリルアミドと、並びに任意に、部分的または全体的に塩とされた弱酸官能基を含むモノマーおよび中性モノマーから選択された1以上のモノマーとのコポリマーであることを特徴とする組成物。化粧料用途。【選択図】 なし
