Compounds of formula I ##STR1## wherein n is 0 or 1, p is a number from 1 to 8, q is 2 or 3, and R.sub.1 is unsubstituted phenyl or phenyl which is substituted by one to three halogen, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.8 alkoxy, C.sub.2 -C.sub.8 alkoxyalkyl or/and C.sub.1 -C.sub.4 alkylthio, are suitable for use as initiators for photopolymerising compounds containing ethylenically unsaturated double bonds.
化合物的公式为I ##STR1## 其中n为0或1,p为1至8的数字,q为2或3,R.sub.1为未取代苯基或取代1至3个卤素,C.sub.1-C.sub.8烷基,C.sub.1-C.sub.8烷氧基,C.sub.2-C.sub.8烷氧基烷基和/或C.sub.1-C.sub.4烷
硫基的苯基,适用于作为含
乙烯基不饱和双键的光聚合化合物的
引发剂。