| abstract |
Compounds of the formulae I, II, and III wherein R1 is for example hydrogen, C3-C8 cycloalkyl, C1-C12alkyl, phenyl unsubstituted or substituted; R2 and R2' for example are hydrogen, C1-C20alkyl, C3-C8cycloalkyl or phenyl, unsubstituted or substituted, or are (I) (I) or (I); Ar1 is for example phenyl, optionally substituted by e.g. (CO)R7, (I)(D), (I)(E) and/or(I)(F); Ar2 is for example phenylene, optionally substituted e.g. by (CO)R7, (D), (E)or (F); Ar3 is for example phenyl; M1,M2 and M3 are, for example, C1-C20alkylene; M4 is for example direct bond, -O-, -S-, -Y-(C1-C10alkylene)-Y'-, optionally substituted;Y and Y' are for example a direct bond or O; R7is for example hydrogen, C1-C20alkyl or phenyl, optionally substituted; R8, R9, R8'and R9' are for example hydrogen or C1-C12alkyl, exhibit an unexpectedly good performance in photopolymerization reactions. |