Peroxycarboxylic ester photoinitiators derived from aromatic nitrogen containing heterocyclic carboxylic acids are described. The heterocyclic aromatic ring may contain additional nitrogen atoms, be fused with another aromatic ring system, be substituted with an additional peroxycarboxylic ester group and/or be substituted with an electron group having a Hammett sigma value greater than 0.1. The peroxycarboxylic ester photoinitiators have been found to be useful in photopolymerizable compositions and photosensitive elements.
所述过氧
羧酸酯类光
引发剂源自芳香族含氮杂
环羧酸。杂环芳香环可包含额外的氮原子、与另一个芳香环系统融合、被一个额外的过氧
羧酸酯基团取代和/或被一个哈米特西格玛值大于 0.1 的电子基团取代。已发现过氧
羧酸酯类光
引发剂在可光聚合的组合物和感光元件中非常有用。