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
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