Triazine derivatives as UV filters for cosmetic compositions

摘要

Triazine derivatives of formula: wherein X1 is a bivalent radical of formula (1a) -NR9-A-NR9-, (1b) or (1c) -O-A-O-; A and A' are unsubstituted or substituted, straight-chain or branched C1-C12alkylene (which is optionally interrupted by C5-C12cycloalkylene, N, O or S), C5-C12cycloalkylene, biphenylene, C6-C10arylene, or C5-C10 arylene-(C1-C12alkylene); R1 is a radical of formula (1d) -C(O)OR5, (1e) -S(O)2OR5, (1f) C(O)R5, (1g) C(O)NR5R6 or (1h) C(O)-X2-W1; R2 and R3 are hydrogen, C1-C12alkyl, OR7, NR7R8, C6-C10aryl: X2 is O or NH; W1 is C1-C20alkyl, or a group Sp-Sil; Sp is a straight-chain or branched saturated or single or multiple unsaturated C3-C12 hydrocarbon; Sil is a silane, an oligosiloxane or a polysiloxane moiety: and R4-R9 are hydrogen, C1-C10alkyl, or C3-C12cycloalkyl: are useful as UV filters. Processes for the preparation of these compounds, the preparation of micronized particles of these compounds, cosmetic compositions (particularly sunscreens) comprising them and UV absorber dispersions comprising them are also outlined.