Initiators for photopolymerization

摘要

Monoketals of esters and amides of aromatic alpha , beta -dioxocarboxylic acids having the formula R - CO - C(OR1)(OR2) - COX]m WHEREIN M IS 1 OR 2, R is a mono- or divalent aromatic residue, R1 and R2 are monovalent organic residues and X is an alkoxy or amino groups, are photoinitiators for the UV-curing of resins. Examples for such resins are acrylates, methacrylates or unsaturated polyesters. The most important application for such photochemical curing is the field of coatings and printing inks.