| abstract |
(57) Abstract: Formulas I and II wherein R 1 , R 2 and R 3 are, for example, unsubstituted or substituted phenyl, wherein all of the R 1 -R 3 groups are R 1 ′, R 2 ′, R 3 ′ have one of the meanings of R 1 -R 3 , not a phenyl group ortho-substituted for the bond to the boron atom; R 4 and R 5 is either OH or oR 6, or have one of the meanings of R 1 ~R 3, R 1 ' , R 2', R 3 'R 4 and R 5 groups are boron R 6 is, for example, unsubstituted or C 1 -C 12 alkoxy- or halo-substituted C 1 -C 12 alkyl; in C 1 -C 20 alkylene, unsubstituted or, or whether it is interrupted by a substituted or one or more aromatic hydrocarbon group, or X is was a If, be a C 3 -C 12 cycloalkylene or poly cycloalkylene; and Z + is a compound of a is) group capable of forming a cation, suitable as coinitiators for the photopolymerization of ethylenically unsaturated compounds ing. |