Joanna Ortyl, Anna Chacha-Brekiesz, Iwona Kaminska- Borek
Cracow University of Technology
Patent P.412723; P.408415
The subject of this invention is a set of new, highly efficient photoinitiators based on novel quatraphenyle molecules, for cationic, free-radical and hybrid photopolymerization processes of monomers. The newly developed photoinitators are an alternative method to increase the initiation efficiency of photopolymerization processes, when medium pressure mercury lamps are used as the UV light sources. Novel photoinitiators are specifically adapted also for visible LED excitation. The photoinduced polymerization of monomers is gaining popularity as an environmentally friendly and safe method for production of protective polymer coatings on various surfaces. It is applied for photocurable solvent-free paints, lacquers, inks, dental fillings and other coating materials, wherever fast drying or setting is important.