SpeedCure 939

SpeedCure 939 is cationic photoinitiator of the iodonium borate family. With absorption maximum at 258 nm, SpeedCure 939 provides high reactivity and solubility in cationic systems when used at 0.5-5 wt% in UV curable formulations and LED curable formulations when sensitised with thioxanthones.

CAS no. 178233-72-2
Chemical name 4-Isopropyl-4'-methyldiphenyliodonium Tetrakis(pentafluorophenyl)borate