Non-ionic Photoacid Generators Sensitive to 365nm Light-Synthesis and Applications to Photocrosslinking Systems-

Non-ionic photoacid generators (PAG) based on imino sulfonates and N-hydroxyimide sulfonates were designed and synthesized. To obtain the PAGs sensitive to 365 nm light, fluorenone oxime, thioxanthone oxime and N-hydroxyimide derivatives of thioxanthone were used as a chromophore. The PAGs obtained were thermally stable and highly photosensitive. A mechanism for the photolysis of the PGAs was discussed. Some of the thioxanthone-based PAGs were sensitive to 436 nm light. Photocrosslinking of poly(glycidyl methacrylate) using the PAG was also studied.