| abstract |
The present invention relates to novel photoinitiators of formula (I), (II), (III), (IV), (V) and (VI).n n n Formula In n n n n n n n Formula IIn n n n n n n n Formula IIIn n n n n n n n Formula IVn n n n n n n n Formula Vn n n n n n n n Formula VIn n n n n n n n In Formula I, II, III, IV, V or VI,n n n R 1 and R 2 are each independently C 1 -C 8 alkyl; In OH, C 1 -C 4 alkoxy, -COO (C 1 -C 8 alkyl), (C 1 -C 4 alkyl) -COO-, -CN, benzyl, phenyl or -N (R 15 ) (R 16 ) C 1 -C 4 alkyl substituted by; C 3 -C 6 alkenyl, benzyl, -CH 2 -C 6 H 4- (C 1 -C 4 alkyl) or phenyl; orn n n R 1 and R 2 together are straight or branched C 2 -C 9 alkylene or C 3 -C 6 -oxa-alkylene or -aza-alkylene;n n n R 3 , R 4 , R 5 and R 6 independently of one another are hydrogen, C 1 -C 8 alkyl, C 3 -C 6 alkenyl, benzyl, -CH 2 -C 6 H 4- (C 1 -C 4 alkyl ) Or phenyl;n n n R 3 and R 4 together and / or R 5 and R 6 together are straight or branched C 2 -C 9 alkylene;n n n A is Cl, Br, —OR 9 , —N (R 11 ) (R 12 ) or —SR 18 ;n n n A 'is -O-, -NH- or -NR 11- ;n n n A ″ is Cl, Br, —OR 9. —N (R 11 ) (R 12 ) or —SR 18 or hydrogen;n n n X is -OR 10 or -N (R 13 ) (R 14 );n n n n is an integer from 1 to 10, preferably an integer from 1 to 4, in particular 1, 2 or 3;n n n R 7 is a linker,n n n R 8 is a divalent C 2 -C 3 alkylene radical. |