Stable cosmetic composition, e.g. for skin care, containing hydrophilic active agent, e.g. ascorbic acid, and combination of two polymeric gelling agents derived from acrylamidomethylpropanesulfonic acid

摘要

A composition (I) having a continuous aqueous phase of pH 5.5-7.5 contains: (A) at least 1.5 wt. % crosslinked poly-(acrylamido-methyl-propanesulfonic acid); (B) at least 1 wt. % of a water-soluble crosslinked anionic polymer, containing units obtained by the reaction of: (i) acrylamide; (ii) 2-acrylamido-2-methyl-propanesulfonic acid (AMPS); and (iii) poly-olefinically unsaturated monomer; and (C) at least one hydrophilic active agent. A composition (I) having a continuous aqueous phase of pH 5.5-7.5 contains: (A) at least 1.5 wt. % (based on (I) of at least one crosslinked poly-(acrylamido-methyl-propanesulfonic acid) comprising (in random distribution) 90-99.9 wt. % (based on polymer) units of formula (II) and 0.01-10 wt. % crosslinking units derived from monomer(s) having at least two olefinic double bonds; (B) at least 1 wt. % (based on (I)) of a water-soluble crosslinked anionic polymer, containing units obtained by the reaction of: (i) acrylamide; (ii) 2-acrylamido-2-methyl-propanesulfonic acid (AMPS); and (iii) at least one poly-olefinically unsaturated monomer (crosslinking agent); and (C) at least one hydrophilic active agent. X<+> = cation or mixture of cations.