| abstract |
Disclosed is the use of the compounds of formula n n n wherein n A is a radical of formula n n n R 1 and R 5 independently from each other are hydrogen; C 1 -C 18 alkyl; or C 6 -C 12 aryl; n R 2 , R 3 and R 4 independently from each other are hydrogen; or a radical of formula n n n wherein, in formula (1 a ), at least one of the radicals R 2 , R 3 and R 4 are a radical of formula (1 c ); n R 6 , R 7 , R 8 , R 9 and R 10 independently from each other are hydrogen; hydroxy; halogen; C 1 -C 18 alkyl; C 1 -C 18 alkoxy; C 6 -C 12 aryl; biphenylyl; C 6 -C 12 aryloxy; C 1 -C 18 alkylthio; carboxy; —COOM; C 1 -C 18 -alkylcarboxyl; aminocarbonyl; or mono- or di-C 1 -C 18 alkylamino; C 1 -C 10 acylamino; —COOH; n M is an alkali metal ion; n x is 1 or 2; and n y is a number from 2 to 10; n for the protection of human and animal hair and skin against the damaging effect of UV radiation. n The compounds of formula (1) are high effective UV absorbers for cosmetic formulations aund can be—depending on their physical properties be used in micronized or soluble form. |