| abstract |
The invention relates to oxime ester photoinitiators, and relates to compounds of formula (I), (II), and (III), wherein R1, R2, R2' and R2'' for example are C1-C20alkyl, provided that at least one of R1, R2, R2' and R2'' carries a specified substituent; R3, R4, and R5 for example independently of one another are hydrogen or a defined substituent provided that at least one of R3, R4 or R5 is other than hydrogen or C1-C20alkyl; R6, R7, R8, R7', RV, R8', R6'', R7'', R6'' and R7'' for example independently of one another have one of the meanings as given for R3, R4, and R5; and R9 for example is C1-C20alkyl; exhibit an unexpectedly good performance in photopolymerization reactions. |