Acyl phosphine oxide photoinitiator as well as preparation method and application thereof

The invention relates to an acylphosphine oxide photoinitiator as well as a preparation method and application thereof, the acylphosphine oxide photoinitiator comprises two or three acylphosphine oxide groups which are symmetrically distributed, and the acylphosphine oxide groups are connected through specific groups, so that the obtained photoinitiator shows high photo-initiation activity, and the photoinitiator can be used as a photoinitiator. Compared with a photoinitiator TPO, the photoinitiator TPO has the characteristics of low migration rate, low odor and low toxicity, and has a wider application prospect compared with TPO; and the preparation method is short in process flow, simple to operate and convenient for industrial application. 本发明涉及一种酰基膦氧化物光引发剂及其制备方法和用途，所述酰基膦氧化物光引发剂中包含对称分布的两个或三个酰基膦氧化物基团，上述酰基膦氧化物基团之间通过特定基团连接，使得所得光引发剂表现出高的光引发活性，且相较于光引发剂TPO具有低迁移率、低气味、低毒性的特点，相较于TPO具有更广阔的应用前景；且其制备方法工艺流程短，操作简单，便于工业化应用。