Synthesis and properties of a novel high sensitive photo-radical initiator based on biphenyl-2,2′-dicarboximide derivatives

Abstract

A new high sensitive photo-radical initiator, N-[2-(2-acryloyloxyethoxy) ethyl]biphenyldicarboximide (BDI-5) was developed. BDI-5 was prepared from diphenic anhydride and aminoalcohol, followed by the reaction with acryloyl anhydride. BDI-S is soluble in organic solvents, has no absorbance above 380 nm and high thermal stability over 300°C. BDI-5 acts as a hydrogen transfer type photo-initiator in the presence of triethanolamine (TEA) as a proton donor, and has good compatibility with a matrix such as pentaerythritol triacrylate (PETA). The photosensitivity of BDI-5 with TEA for the polymerization of PETA was comparable to the excellent photo-radical initiators, 2-methyl-4′- (methylthio)-2-morpholinopropiophenone (Irg907). © 2006 The Society of Polymer Science.