| abstract |
Compounds of formula (I), (II), and (III), wherein R1, R2, R'2 and R'' '2 for example are C1-C20alkyl, provided that at least one of R1, R2, R'2 and R'' '2 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, R'7, RV, R'8, R''6, R''7, R'' '6 and R'' '7 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. |