Patent ID: 6171579
Filing Date: 2001-01-09
Classification: A61K,A61P,A61Q

Abstract:
A topically applicable cosmetic/dermatological sunscreen composition suited for the UV-photoprotection of human skin and/or hair, comprising UV-photoprotecting SPF-synergistically effective amounts of (i) at least one 1,3,5-triazine UV-screening compound having the structural formula ##STR14##in which X.sub.1, X.sub.2, X.sub.3, which may be identical or different, are each an oxygen atom or a radical --NR--, wherein the radicals R, which may be identical or different, are each a hydrogen atom, or a linear or branched C.sub.1 -C.sub.18 alkyl radical, or a C.sub.5 -C.sub.12 cycloalkyl radical optionally substituted with one or more C.sub.1 -C.sub.4 alkyl radicals; R.sub.1, R.sub.2 and R.sub.3, which may be identical or different, are each a hydrogen atom, an alkali metal, an ammonium radical optionally substituted with one or more alkyl or hydroalkyl radicals, a linear or branched C.sub.1 -C.sub.18 alkyl radical, a C.sub.5 -C.sub.12 cycloalkyl radical optionally substituted with one or more C.sub.1 -C.sub.4 alkyl radicals, a polyoxyethylenated radical comprising from 1 to 6 ethylene oxide units and in which the OH endgroup is methylated, or a radical having one of the formulae (II), (III) or (IV) below: ##STR15##in which R.sub.4 is a hydrogen atom or a methyl radical; R.sub.5 is a C.sub.1 -C.sub.9 alkyl radical; n is an integer ranging from 0 to 3; m is an integer ranging from 1 to 10; A is a C.sub.4 -C.sub.8 alkyl radical or a C.sub.5 -C.sub.8 cycloalkyl radical; B is a linear or branched C.sub.1 -C.sub.8 alkyl radical, a C.sub.5 -C.sub.8 cycloalkyl radical, an aryl radical optionally substituted with one or more C.sub.1 -C.sub.4 alkyl radicals; and R.sub.6 is a hydrogen atom or a methyl radical; and (ii) at least one benzotriazole-substituted silicon UV-screening compound which comprises at least one structural unit having the formula (1):O.sub.(3-8)/2 Si(R.sub.7).sub.a -G (1)in which R.sub.7 is an optionally halogenated C.sub.1 -C.sub.10 alkyl radical, or a phenyl radical, or a trimethylsilyloxy radical; a is an integer ranging from 0 to 3, inclusive; and G is a monovalent radical directly bonded to a silicon atom, and which has the formula (2): ##STR16##in which the radicals Y, which may be identical or different, are each a C.sub.1 -C.sub.8 alkyl radical, a halogen atom, or a C.sub.1 -C.sub.4 alkoxy radical, with the proviso that, in the latter case, two adjacent radicals Y on the same aromatic ring member can together form an alkylidenedioxy group in which the alkylidene moiety has 1 or 2 carbon atoms; X is O or NH; Z is a hydrogen atom or a C.sub.1 -C.sub.4 alkyl radical; n is an integer ranging from 0 to 3, inclusive; m is 0 or 1; and p is an integer ranging from 1 to 10, inclusive; formulated into a topically applicable, cosmetically/dermatologically acceptable support therefor.