| abstract |
Disclosed is the use of benzylidene malonates of formula (1), wherein R 1 and R 2 , independently from each other are hydrogen; OH; C 1 -C 12 alkyl; C 1 -C 12 alkoxy; C 1 -C 12 alkylamino; C 1 -C 12 dialkylamino; water-solubilizing groups, selected from carboxylate, sulfonates or ammonium radicals; R 3 is COOR 5 ; COR 5 ; CONR 5 R 6 ; CN; or SO 2 R 7 , R 4 is COOR 8 ; COR 9 ; CONR 8 R 9 ; CN; or SO 2 R 10 ; R 5 , R 6 , R 7 , R 8 , R 9 and R 10 independently from each other are C 1 -C 18 alkyl; unsubstituted or by one or more than one C 1 -C 4 alkyl substituted C 3 -C 12 -cycloalkyl; unsubstituted or C 1 -C 6 alkyl-substituted C 6 -C 20 aryl; organosilanyl, or organosiloxanyl; A is —C 1 -C 20 alkylene-, —CH 2 CH(OH)CH 2 —, —C 5 -C 20 cycloalkylene, —C 2 -C 20 alkenylene-, —C 5 -C 10 arylene-, or —C 5 -C 10 arylene-(C 1 -C 10 alkylene)- which are unsubstituted or substituted, straight-chain or branched, optionally interrupted by one or more than one heteroatoms selected from —O, —S— or —NH—; for the protection of human and animal hair and skin against UV radiation. |