| abstract |
Compounds of the formula I, in which R1 and R2 are a group of the formula II, R3, R4, R5, R6 and R7 independently of one another are hydrogen, OR8, or SR9; R8 and R9 independently of one another are C1-C12alkyl; Y is C1-C12alkylene; C4-C40alkylene interrupted one or more times by -O-, or -S-; or Y is phenylene, or a group of the formula XI, and mixtures of these compounds with acylphosphine photoinitiators are suitable for photopolymerizing compounds having ethylenically unsaturated double bonds. |