abstract |
Dye compounds of the formula (see fig.1) (I),wherein X is for example CH, C-CH3 or +NOR L; R is inter alia C1-C6alkyl; R1 is for example C1-C8alkoxy or C1-C12alkyl; s is 0 to 4; R2 is for example hydrogen; Ar is for example a group , . (E); Y inter alia is C1-C6alkyl or C1-C6alkoxy; r in the formula (A) is 0 to 5, in the formulae (B) and (E) is 0 to 9 and in the formula (D) is 0 to 7; and L is an anion; in combination with an electron donor compound, especially a borate compound, are suitable as photoinitiators for the photopolymerization of radically polymerizable compositions. |