A New Onium Salt for Cationic Curing of White Pigmented Expoxy Formulations

Abstract: a new cationic photoinitiátor, 4-isobutylphenyl-4'-methylphenyliodonium hexafluorophosphate (Dl-3), exhibits very high efficiency in the UV-curing of thick -pigmented coatings. 1-chloro-4-propoxythioxanthone was found to be superior to isopropylthioxanthone as a sensitizer. Application results are discussed.