Near UV-visible light induced cationic photopolymerization reactions: A three component photoinitiating system based on acridinedione/silane/iodonium salt

Acridinediones (AD) are attractive dyes exhibiting a strong absorption at about 400 nm When used in the presence of a silane and an iodonium salt they efficiently initiate the free radical promoted cationic photopolymerization of an epoxide under air and upon a xenon lamp a laser diode or sunlight exposure The mechanism analyzed by ESR and laser flash photolysis is discussed and opens a new way for the design of such three-component systems (C) 2010 Elsevier Ltd All rights reserved