| abstract |
The invention pertains to novel oligofunctional photoinitiators of the formula (1) or (1A). R 1 and R 2 are methyl or together are -(CH 2 ) 5 -; and n is 2 or 3, and the solvent in (1A) is water or an organic solvent; and their use in photopolymerizable compositions, in particular inks. |