A. Cleavable Photoinitiators with Reduced Oxygen Sensitivity

Radiation curing is a well established and highly efficient method for crosslinking of coatings, printing inks 1 Photoinitiators 2 the key component in such systems have a great influence on storage life, curing rate and curing depth, but also on double bond conversion (DBC) and surface cure. Among the large group of P1 structures, hydroxyalkyiphenones have gained much interest during the last decades due to their high reactivity and universal applicability. Modifications have been carried out at the para position of the benzoyl chromophore to optimize these.