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

A technology of hydroxy monopropenyl ether and monovinyl ether is applied in the field of free radical photoinitiator and its preparation, and can solve the problems of inconvenient storage and inconvenient application.

Active Publication Date: 2015-04-22
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the polymerizable groups of these polymerizable photoinitiators are also easily self-initiated to self-polymerize gels. Although the migration problem of photoinitiators is solved, it is inconvenient to store and not widely used.

Method used

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

Examples

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Effect test

Embodiment 1

[0069] The product of the present invention is a free radical photoinitiator H-T-2959 containing a monovinyl ether group, and its specific structural formula is:

[0070]

[0071] The product H-T-2959 of the present invention is prepared from 4-hydroxybutyl vinyl ether, toluene-2,4-diisocyanate and photoinitiator 2959 as basic raw materials.

Embodiment 2

[0072] Embodiment 2: the preparation method of product H-T-2959 of embodiment 1 of the present invention

[0073] A preparation method of a free radical photoinitiator H-T-2959 containing a monovinyl ether group of the product described in Example 1 of the present invention, the detailed steps of the preparation method are as follows:

[0074] a. First, add 174g (1mol) of toluene-2,4-diisocyanate into a reaction vessel equipped with a thermometer, a stirrer, a dropping funnel and a condenser connected to a drying tube, and stir to control the temperature at 30±2°C. Gradually add 116g (1mol) 4-hydroxybutyl vinyl ether, finish adding within 30±1min, then carry out urethanization reaction at a constant temperature of 45±2°C, when the mass content of -NCO reaches 14.5±0.5% And almost no longer reduce to the end of the reaction, the structural formula of the intermediate product obtained after the reaction is:

[0075]

[0076] b. After the reaction in step a, gradually add 2...

Embodiment 3

[0078] The product of the present invention is a free radical photoinitiator H-T-1173 containing a monovinyl ether group, and its specific structural formula is:

[0079]

[0080] The product H-T-1173 of the present invention is prepared from 4-hydroxybutyl vinyl ether, toluene-2,4-diisocyanate and photoinitiator 1173 as basic raw materials.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/48C07C271/28C07C269/02C07D335/16C07D311/16C07C271/24C07C323/43C07C319/20
Inventor 张玉洁王经武李中灵李晓青郑世军夏令红位秀莲李飞
Owner ZHENGZHOU UNIV
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