Novel trifunctional photoinitiators for radiation-curable compositions

摘要

Trifunctional photoinitiator ketones of formula (I) and formula (II), wherein the variables are as defined in the specification, are disclosed. The disclosure relates to these photoinitiators and to mixtures thereof that are suitable for radiation-curable compositions, especially using ultraviolet and visible radiation, to intermediates for their preparation and to a process for the preparation of the initiators from the intermediates. The compositions comprising these trifunctional photoinitiators are particularly suitable for use in the production of pigmented and nonpigmented surface coatings (especially for coating the surface of food packaging materials), overprint coatings, powder coatings, printing inks, inkjet inks, gel coats, composite materials or glass fibre coatings.