Patent ID: 7311897

Claim:
A method for the protection of human and animal hair and skin against the damaging effect of UV radiation, which comprises applying an effective protecting amount to said hair or skin of at least one compound of formula wherein A is a radical of formula R 1 and R 5 independently from each other are hydrogen; C 1 -C 18 alkyl; or C 6 -C 12 aryl; R 2 , R 3 and R 4 independently from each other are hydrogen; or a radical of formula wherein, in formula (1a), at least one of the radicals R 2 , R 3 and R 4 are a radical of formula (1c); 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; M is an alkali metal ion; x is 1 or 2; and y is a number from 2 to 10.