Composition, useful for the cosmetic treatment of e.g. skin, comprises silicon-s-triazine substituted by at least two groups of alkylaminobenzoates, and hydrophilic or water soluble merocyanine UV filter, in a medium of UV filter system

Composition comprises: (i) at least one silicon-s-triazine substituted by at least two groups of alkylaminobenzoates (I); and (ii) at least one hydrophilic or water soluble merocyanine UV filter, in a medium of at least a UV filter system. Composition comprises: (i) at least one silicon-s-triazine substituted by at least two groups of alkylaminobenzoates of formula (D-Si(R) a-O (3-a)/2) (I); and (ii) at least one hydrophilic or water soluble merocyanine UV filter, in a medium of at least a UV filter system. R : 1-2C alkyl, phenyl, 1-2C alkoxy, OH or trimethylsilyloxy; a : 1-3; D : triazine group of formula (II); R1 : 1-10C alkyl optionally unsaturated and containing 5-6C cycloalkyl group, C(=O)OR1 group can be ortho, meta or para to the amino group; R2 : H, OH, 1-4C alkyl or methoxy; A : methylene group, group of formula (-Z-CHW1-CH 2-) (III), (-Z-CHCH 3-) (IV), (-Z-CH=CH-) (V) or (-Z-C(=CH 2)-) (VI), siloxane units of formula (-A-(Si)(R) a(O) (3-a)/2), or organosiloxane comprising units of formula ((R) b-(Si)(O) (4-b)/2); Z : 1-3C alkylene; W1 : H, OH or 1-3C alkyl; and b : 1-3. [Image]. La présente invention concerne une composition comprenant dans un support cosmétiquement acceptable au moins un système filtrant UV, caractérisée par le fait qu'elle comprend : (i) au moins une s-triazine siliciée de formule (I) substituée par au moins deux groupes alkylaminobenzoates ; (ii) au moins un filtre UV mérocyanine hydrophile ou hydrosoluble en particulier de formule (IX) ou (X) suivante :