F. Castellanos et al., SYNTHESIS, REACTIVITY, AND PROPERTIES OF NEW DIARYLIODONIUM SALTS AS PHOTOINITIATORS FOR THE CATIONIC POLYMERIZATION OF EPOXY SILICONES, Journal of applied polymer science, 60(5), 1996, pp. 705-713
Diaryliodonium tetrakis (pentafluorophenyl) berate salts generate a hi
gher reactivity than any other known diaryliodonium salt. The photoche
mical properties of diaryliodonium tetrakis (pentafluorophenyl) borate
salts were compared to those of the diaryliodonium hexafluoroantimona
te salt. The results show that these new salts are the most reactive p
hotoinitiators in this family. In addition, diaryliodonium tetrakis (p
entafluorophenyl) berate salts are soluble in low polarity media, such
as epoxy silicone oils, which are rich in epoxy groups and insensitiv
e to humidity. These salts have the advantage not to contain a heavy m
etal (such as antimony). The new properties generated by the use of th
e tetrakis (pentafluorophenyl) berate anion make the future of the cat
ionic photopolymerization promising. (C) 1996 John Wiley & Sons, Inc.