| abstract |
PURPOSE: To increase sensitivity of a compsn. to active rays within a range from ultraviolet rays to visible rays by using ≥2 kinds of specified photopolymn. initiators in combination. n CONSTITUTION: The compsn. contains a polymerizable compd. having unsatd. bonds capable of causing addition polymn., ≥1 kind of photopolymn. initiator expressed by the formulas I-III, a compd. having a C-halogen bond, an aromatic onium salt, an org. peroxide, a thio compd. expressed by the formula IV or V, at least one photopolymerizable compd., i.e. hexaryl biimidazole, and/or ketoxime ester. In the formulas, A is O, or S, etc.; Y 1 is H, or alkyl, etc.; each R 1 and R 2 is H, 1-18C alkyl, etc.; n is zero-4; R 4 is alkyl, or aryl, etc.; R 5 is H, alkyl, etc. n COPYRIGHT: (C)1990,JPO&Japio |