Novel benzophenone derivatives represented by the general formula R.sub.m.sup.1 --C.sub.6 H.sub.5-m --CO--C.sub.6 H.sub.5-n --R.sub.n.sup.2 where R.sup.1 is a halogen atom, a monovalent C.sub.1-10 hydrocarbon, alkoxy, thioalkoxy, amino, or dialkylamino group, R.sup.2 is an unsubstituted or organosiloxy-substituted organosilyl group, and m and n are each integers from 1 to 5. The benzophenone derivatives are useful as photosensitizers for making photo-curable compositions by blending with photo polymerizable resins, especially photopolymerizable organosilicon resins. Such photo-curable organosilicon resin compositions are further useful for making dry-planographic printing plates comprising non-image areas formed from the polymerized and cured layers of the composition.
该专利描述了一种新型苯基酮衍
生物,其一般式为R.sub.m.sup.1 --C.sub.6 H.sub.5-m --CO--C.sub.6 H.sub.5-n --R.sub.n.sup.2,其中R.sup.1是卤素原子、一价的C.sub.1-10碳氢化合物、烷氧基、
硫代烷氧基、
氨基或二烷基
氨基基团,R.sup.2是未取代或有机
硅氧基取代的有机
硅基团,m和n分别为1到5的整数。这些苯基酮衍
生物可用作光敏剂,通过与光聚合
树脂混合制成光固化组合物,特别是光聚合有机
硅树脂。这种光固化有机
硅树脂组合物进一步可用于制备干式平版印刷版,其中非图像区域由组合物的聚合和固化层形成。