K. Komoto et al., PHOTOPOLYMERIZATION OF VINYL ETHER BY HYDROXY- AND METHYLTHIO-ALKYLPHOSPHONIUM SALTS AS NOVEL PHOTOCATIONIC INITIATORS, Polymer, 35(1), 1994, pp. 217-218
2-Hydroxy-3-chloropropyl- and 2-methylthio-1-phenylethyltriphenylphosp
ium salts have been used as novel photoinitiators for cationic polymer
ization of vinyl ethers.