申请人:Minnesota Mining and Manufacturing Company
公开号:US05480994A1
公开(公告)日:1996-01-02
Aminoketone-substituted coumarin sensitizers having quaternary amine substituents are described which have very high photosensitivity, and are useful in moderate pH aqueous-developable printing plates. The aminoketone-substituted coumarin sensitizers are described by the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent an alkyl group having 1 to 6 carbon atoms, and R.sub.3 and R.sub.4 each represent hydrogen; or at least one of R.sub.1 and R.sub.3 or R.sub.2 and R.sub.4 together represent an alkylene group having 2 to 4 carbon atoms, R.sub.5 represents an alkyl group having 1 to 6 carbon atoms or H, R.sub.6 represents an alkylene group having 1 to 16 carbon atoms, an oxyalkylene group having form 1 to 16 carbon atoms, or a poly(oxyalkylene) group in which said alkylene group has 2 to 4 carbon atoms and the number of oxygen atoms is a positive integer less than or equal to four, R.sub.7, R.sub.8, and R.sub.9 each independently represent an alkyl group having 1 to 6 carbon atoms, or any two of R.sub.7, R.sub.8, and R.sub.9 taken together represent an alkylene group having 4 to 6 carbon atoms; R.sub.7, R.sub.8, and R.sub.9 taken together with the N atom to which they are bonded represent a quinuclidinio group, or R.sub.6, taken together with R.sub.7, R.sub.8, or R.sub.9 represent a five, six, or seven membered heterocyclic ring group, and X.sup.- represents any anion. Photopolymer compositions comprising a free-radically polymerizable material, a photoinitiator, and an aminoketone-substituted coumarin sensitizer having quaternary amine substituents, are also disclosed.
本文描述了具有季铵基取代基的氨基酮取代香豆素敏化剂,具有非常高的光敏度,并且在中等pH值的水可开发印刷版中非常有用。 氨基酮取代香豆素敏化剂由以下式子描述:##STR1##其中R.sub.1和R.sub.2各代表具有1到6个碳原子的烷基,R.sub.3和R.sub.4各代表氢;或者R.sub.1和R.sub.3或R.sub.2和R.sub.4中至少一个组合代表具有2到4个碳原子的烷基,R.sub.5代表具有1到6个碳原子的烷基或H,R.sub.6代表具有1到16个碳原子的烷基,具有1到16个碳原子的氧烷基,或者具有2到4个碳原子的所述烷基和氧原子数为小于或等于4的正整数的聚(氧烷基)基团,R.sub.7,R.sub.8和R.sub.9各自独立地代表具有1到6个碳原子的烷基,或者R.sub.7,R.sub.8和R.sub.9中的任意两个一起代表具有4到6个碳原子的烷基; R.sub.7,R.sub.8和R.sub.9与它们结合的N原子一起代表喹啉基,或者R.sub.6与R.sub.7,R.sub.8或R.sub.9一起代表五元,六元或七元杂环环基,并且X.sup.-代表任何阴离子。还公开了包含自由基聚合物可聚合材料,光引发剂和具有季铵基取代基的氨基酮取代香豆素敏化剂的光聚合物组合物。