Kangtai Ren

Cationic UV-cured coatings containing epoxidized soybean oil initiated by new onium salts containing tetrakis(pentafluorophenyl)gallate anion

Different formulations containing epoxidized soybean oil (ESO) and a commercial cycloaliphatic epoxy resin (UVR6110) were cured by onium tetrakis(pentafluorophenyl)gallate (Gallate) on steel panels. The resulting coatings were clear and their mechanical properties were tested by the Sward hardness test, cross-hatch tape adhesion test and MEK double rub test. The new initiators have the advantage of good solubility, high reactivity, and the production of colorless coatings. The best formulations obtained contain 50% ESO, 50% UVR6110, and 0.5% silwet if sulfonium gallate is used as initiator, and 60% ESO, 40% UVR6110, and 0.5% silwet if iodonium gallate is the initiator.

Tetrakis(pentafluorophenyl)gallates (I)

Abstract The synthesis of certain iodonium tetrakis(perfluorophenyl)gallate salts is reported. The rates of acid formation when these compounds are irradiated with a broad spectrum mercury arc in EtOH are compared.

Synthesis, properties and photolysis of new iodonium tetrakis(pentafluorophenyl)gallate photoinitiators and comparison with their indate and aluminate analogs☆

Abstract A series of new iodonium tetrakis(pentafluorophenyl)gallates were synthesized in high yield via an improved preparation of the lithium gallate, their photoproducts analyzed by UV, 19F NMR and GC–MS spectra and a photolysis mechanism postulated. The stability of these photoinitiators was also compared with their borate, aluminate and indate analogs.