Photoprotectant cosmetic composition containing an anionic surfactant, compositions filtering ultraviolet radiation and an amphiphilic cationic or dipolar ion compound and its use

摘要

The invention relates to a cosmetic composition, in particular for photoprotecting the skin and/or the hair, in the form of a dispersion comprising two immiscible phases stabilized with at least one anionic surfactant chosen from the salts of fatty acids and of monovalent or polyvalent metals, of ammonium or of organic bases, a compound for screening out ultraviolet radiation, which can be adsorbed at the interface of the said immiscible phases, derived from benzylidenecamphor and comprising at least one partially or totally neutralized sulphonic acid function, a metal oxide nanopigment coated with hydrophobic hydrocarbon-based coating agents and a cationic or zwitterionic amphiphilic compound which leads, with the anionic surfactant, to the formation of a compound capable of lowering the water/liquid paraffin interface tension at 40° C. by more than 14 mN.m-1 for an anionic surfactant concentration of 0.1 mmol/100 g, by more than 26 mN.m-1 for an anionic surfactant concentration of 0.5 mmol/100 g and by more than 33 mN.m-1 for an anionic surfactant concentration of 1 mmol/100 g.