Photoinitiator as well as preparation method and application thereof

The invention relates to a photoinitiator and a preparation method and application thereof.The two ends of a chain segment containing six ester groups in the molecular structure of the photoinitiator are connected with two 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-acetone active groups, and in the structure, the chemical synthesis difficulty is reduced through polyester-based long chains; and the molecular weight of the final product is obviously increased, and the obtained photoinitiator has the characteristics of high photocuring activity, low migration rate and low odor. 本发明涉及一种光引发剂及其制备方法和应用，所述光引发剂的分子结构中包含6个酯基基团的链段的两端连接两个2-甲基-1-(4-甲硫基苯基)-2-吗啉-1-丙酮活性基团，上述结构中多酯基型长链降低了化学合成难度，且显著增大了最终产物分子量，所得光引发剂具有较高的光固化活性，且具有低迁移率、低气味的特点。