| abstract |
Oxime ester compounds of the formula I, II, III, IV or V, wherein Z is for example (formula A); Z 1 for is NO 2 , unsubstituted or substituted C 7 -C 20 aroyl or unsubstituted or substituted C 4 -C 20 heteroaroyl; provided that at least one Z 1 is other than NO 2 ; Z 2 is for example unsubstituted or substituted C 7 -C 20 aroyl; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 for example are hydrogen, halogen, or unsubstituted or substituted C 1 -C 20 alkyl, unsubstituted or substituted C 6 -C 20 aryl, or unsubstituted or substituted C 4 -C 20 heteroaryl; R 9 , R 10 , R 11 , R 12 and R 13 for example are hydrogen, halogen, OR 16 , unsubstituted or substituted C 1 -C 20 alkyl; provided that R 9 and R 13 are neither hydrogen nor fluorine; R 14 is for example unsubstituted or substituted C 6 -C 20 aryl or C 3 -C 20 heteroaryl Q is for example C 6 -C 20 arylene or C 3 -C 20 heteroarylene; Q 1 is —C 1 -C 20 alkylene-CO—; Q 2 is naphthoylene; Q 3 is for example phenylene; L is for example O-alkylene-O—; R 15 is for example hydrogen or C 1 -C 20 alkyl; R 20 is for example hydrogen, or unsubstituted or substituted C 1 -C 20 alkyl; are effective photoinitiators. |