Under UV illumination, THM202 undergoes both free radical polymerization and cationic polymerization simultaneously during the curing process, resulting in the formation of an interpenetrating polymer network structure. The cured film's mechanical properties, solvent resistance, and thermal stability are superior to those of a free radical-cured film.

TR-PAG-20101 is an off-white powder photoinitiator of triarylsulfonium hexafluorophosphate salt. TR-PAG-20101 is designed for the cationic curing of optical films, inks, photo resists and coatings.

TR-PBG-304 is a highly efficient photoinitiator, which is used to free radical UV curing system.