Onium salts of Group VIa elements having an MF.sub.6 -anion, where M is selected from P, As and Sb, have been found to be photo active under ultraviolet light. These onium salts can be employed as cationic photoinitiators when used with a variety of organic resins and cyclic organic compounds.
VIa族元素的onium盐具有MF6-阴离子,其中M选自P、As和Sb,已被发现在紫外光下具有光活性。当与各种有机
树脂和环状有机化合物一起使用时,这些onium盐可以用作阳离子光
引发剂。