Development of Photobase Generator with Benzoin Derivatives and Its Application to Photosensitive Materials

Abstract

We developed novel photobase generators (PBGs) that generate radicals and aliphatic amines simultaneously. We demonstrated that the PBGs induced radical polymerization and hydrolytic polycondensation. A film of poly[(methacryloxypropyl)silsesquioxane] (MA-PS) was cured in the presence of a PBG upon UV-light irradiation at 254 nm. This result showed that radical polymerization of methacryloyl groups of MA-PS with the photogenerated radicals and the crosslinking reactions based on the base-catalyzed condensation reactions of alkoxysilyl units of MA-PS proceeded. Furthermore, pencil hardness showed HB at 1.0 J cm−2 and 4H at 21.6 J cm−2 without heat treatment.