Free radical photoinitiator containing single vinyl ether group or single propenyl ether group, and preparation method thereof

Abstract

The invention discloses a free radical photoinitiator containing a single vinyl ether group or a single propenyl ether group, and a preparation method thereof. The method comprises the following steps of: firstly adding diisocyanate, hydroxyl single vinyl ether or hydroxyl single propenyl ether into a reaction container and performing an ammonia esterification reaction; after reacting, adding a small-molecular free radical photoinitiator containing hydroxyl radicals, a solvent, a polymerization inhibitor and a catalyst into the reaction container and continuously performing the ammonia esterification reaction; and removing the solvent after reacting, thereby obtaining the free radical photoinitiator product containing the single vinyl ether group or the single propenyl ether group. Based on the vinyl ether group or the propenyl ether group, the free radical photoinitiator can be used for overcoming the defect of other polymerizable photoinitiators which are easy to polymerize automatically and poor in photostability, and has the good storage stability. When the free radical photoinitiator is used for a free radical photo-curing system, the free radical photoinitiator also has the advantages of low mobility and high stability. The free radical photoinitiator which is reliable and safe can be applied to UV (ultraviolet)-cured adhesives, coating materials and printing inks. Thus, the free radical photoinitiator has the great significance for the application and the popularization of photo-curing products in food packaging and medicine packaging.

Description

technical field

[0001] The invention belongs to the technical field of photoinitiators, in particular to a free radical photoinitiator containing monovinyl ether or monopropenyl ether group and a preparation method thereof. Background technique

[0002] Photocuring is the process of using ultraviolet light or visible light to initiate rapid polymerization of chemically active substances and instantly solidify them into solid materials. Compared with other curing technologies, light curing technology has many advantages such as low energy consumption, less pollution, fast and complete curing at room temperature, and wide adaptability. It is a new green technology. According to the mechanism of initiating polymerization, photocuring can be divided into free radical photocuring, cationic photocuring, and free radical-cation hybrid photocuring. Among them, free radical-cation hybrid photocuring combines the advantages of free radical photocuring and cationic photocuring, and le...

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