Process for the preparation of a composition comprising an oil phase, an aqueous phase, at least one emulsifying system of water-in-oil (W/O) type, optionally at least one emulsifying system of oil-in-water (O/W) type, in the form of an inverse latex comprising from 20% to 70% by mass and preferably from 25% to 50% by mass of a branched or crosslinked polyelectrolyte, characterized in that the said polyelectrolyte is a copolymer of 2-acrylamido-2-methylpropanesulfonic acid partially or totally salified with acrylamide and optionally one or more monomers chosen from monomers containing a partially or totally salified weak acid function and/or from neutral monomers other than acrylamide, said production process being characterized in that the preparation of said aqueous phase comprises the dissolution in the aqueous medium of solid 2-acrylamido-2-methyl propanesulfonic acid. Cosmetic, dermopharmaceutical or pharmaceutical composition comprising the inverse latex directly obtained by said process.
一种组合物的制备方法,该组合物包括油相、
水相、至少一种油包
水型(W/O)乳化体系,可选择至少一种
水包油型(O/W)乳化体系,其形式为反向胶乳,其中支链或交联聚电解质的质量百分比为 20%至 70%,最好为 25%至 50%、其特征在于,所述聚电解质是部分或全部用
丙烯酰胺盐化的 2-
丙烯酰胺基-2-甲基
丙磺酸和可选的一种或多种单体的共聚物,这些单体选自含有部分或全部盐化弱酸功能的单体和/或
丙烯酰胺以外的中性单体,所述生产工艺的特征在于,所述
水相的制备包括在
水介质中溶解固体 2-
丙烯酰胺基-2-甲基
丙磺酸。化妆品、皮肤药剂或药物组合物,包含通过上述工艺直接获得的反相胶乳。