| abstract |
The invention relates to novel photoinitators of formulae (V), (II), (III), (IV), (V) and (VI) wherein R 1 and R 2 are each independently of the other C 1 -C 8 alkyl; C 1 -C 4 alkyl substituted by OH, C 1 -C 4 alkoxy, —COO(C 1 -C 8 alkyl), (C 1 -C 4 alkyl)-COO—, —CN, benzyl, phenyl or by —N(R 15 )(R 16 ); C 3 -C 6 alkerlyl, benzyl, —CH 2 —C 6 H 4 —(C 1 -C 4 alkyl) or phenyl; or R 1 and R 2 together are unbranched or branched C 2 -C 9 alkylene or C 3 -C 6 -oxa- or -azaalkylene; R 3 , R 4 , R 5 and R 6 are each independently of the others 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; R 3 and R 4 together and/or R 5 and R 6 together are unbranched or branched C 2 -C 9 alkylene; A is Cl, Br, —O—R 9 , —N(R 11 )(R 12 ) or —S—R 18 , A′ is —O—, —NH— or —NR 11 —; A″ is Cl, Br, —O—R 9 , —N(R 11 )(R 12 ) or —S—R 18 or hydrogen, X is —O—R 10 or —N(R 13 )(R 14 ), n is an integer from 1 to 10, preferably an integer from 1 to 4, especially 1, 2 or 3; R 7 is a linker; R 8 is a bivalent C 2 -C 3 alkylele radical. |