Photostable filtering cosmetic composition in emulsion form, containing a water soluble filter with a broad absorption band and at least one fat-solving UV-A filter

摘要

The invention relates to a photostable filtering emulsion containing, in combination, in the aqueous phase a photostable filter with a broad absorption band consisting of 1,4-phenylenebis- (3-methylidene-10-camphorsulphonic acid), and in the oily phase a photostable system filtering out UV-A, comprising at least one of the following compounds, namely N-(2-ethylhexyl)-3-(3-methoxy- 4-n-butoxy-benzylidene)-10-camphorsulphonamide (compound 2), 4-(1,1-dimethylethyl)-4'-methoxydibenzoylmethane (compound 3) and 4-isopropyldibenzoylmethane (compound 4), the latter two compounds 3 and 4 being photochemically stabilised by at least one fat-soluble filter having a lambda max below 330 nm, selected from the following benzylidenecamphor derivatives: benzylidenecamphor (compound 5), p-methylbenzylidenecamphor (compound 6), N-(2-ethylhexyl)- 3-(4-sulphamoylbenzylidene)camphor (compound 7) and 3-methoxy- 4-n-butoxybenzylidenecamphor (compound 8). This composition is intended for protecting the skin against UV rays of wavelengths between 280 and 380 nm.