PHOTOPOLYMERIZABLE COMPOSITION CONTAINING AN ACID-POLYMERIZABLE MATERIAL, AN IODONIUM SALT AND A FREE RADICAL GENERATOR

摘要

Photopolymerisable compositions capable of polymerisation by an acid-catalysed mechanism under the influence of ultraviolet and/or visible light comprise(a) at least one material capable of polymerisation by an acid-catalysed mechanism to a polymeric material of higher molecular weight state, (b) a photosensitive aromatic halonium salt and (c) a material which under the conditions of photopolymerisation will yield a significant proportion of free radicals. These compositions yield useful coating films and other products on irradiation.