A self-initiating UV-curable oligomer and its preparation method

An ultraviolet light and self-initiation technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of irritating odor, low initiation efficiency, easy migration, etc., and achieve high glass transition temperature, high initiation efficiency, and solidification high degree of effect

Active Publication Date: 2020-09-25
瑞通高分子科技(浙江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the disadvantages of volatilization, easy migration, low initiation efficiency and pungent odor of common initiators used in UV curing of flow coating

Method used

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  • A self-initiating UV-curable oligomer and its preparation method
  • A self-initiating UV-curable oligomer and its preparation method
  • A self-initiating UV-curable oligomer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Synthesis of self-initiated UV-curable oligomer R1

[0032] Table 1, synthetic formula table

[0033]

[0034] Add components 1, 2, 3, and 4 into the flask, add A11 dropwise at less than 45°C, and control the temperature at 60-65°C after the dropwise addition

[0035] After reacting for 3 hours, HEA was added dropwise, and the isocyanate (-NCO) value was detected to be less than 0.1% after reacting at 70-75° C. for 4 hours to obtain the UV-curable self-initiated synthesis product R1. Infrared spectra of the obtained composites are shown as figure 1 shown.

Embodiment 2

[0036] Example 2 Synthesis of self-initiated UV-curable oligomer R2

[0037] Table 2, synthetic formula table

[0038]

[0039]

[0040] Add components 1, 2, 3, and 4 into the flask, add A11 dropwise at less than 45°C, after the dropwise addition, control the temperature at 60-65°C for 3 hours, then add HPA dropwise, at 70-75°C After reacting for 4 hours, it is detected that the isocyanate (-NCO) value is less than 0.1%, and the synthetic product R2 which is self-initiated by ultraviolet curing is obtained. The infrared spectra of the synthesized compounds are shown in figure 2 .

Embodiment 3

[0041] Example 3 Synthesis of self-initiated UV-curable oligomer R3

[0042] Table 3, synthetic formula table

[0043]

[0044]Add components 1, 2, 3, and 4 into the flask, add A11 dropwise at less than 45°C, after the dropwise addition, control the temperature at 60-65°C for 3 hours, then add HEA dropwise, at 70-75°C After reacting for 4 hours, the isocyanate (-NCO) value was detected to be less than 0.1%, and the UV-curable self-initiated synthesis product R3 was obtained.

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Abstract

The invention provides a self-triggered ultraviolet light-cured oligomer and a preparation method thereof. The invention provides a synthetic method of the ultraviolet light-cured self-triggered oligomer. The oligomer is synthesized from 2-hydroxy-2-methyl-1-phenyl-1-propanone, an isocyanate compound, acrylic acid (methylacrylic acid)hydroxyl ester, a catalyst, an aid and the like, is capable of generating free radicals under ultraviolet irradiation and can be automatically cross-linked and cured. An additional ultraviolet light initiator does not need to be added during the ultraviolet lightcuring of the oligomer, so that the oligomer has low odor, and micromolecule fragment is not produced; and after the oligomer is cured into a film, the hardness is of the film is high, and the curingdegree can reach 90%.

Description

technical field [0001] The invention belongs to the field of preparation of UV (ultraviolet light curing) oligomers, and particularly relates to a preparation method of ultraviolet light curing oligomers capable of self-initiation. Background technique [0002] UV-curable coatings are one of the most environmentally friendly coating varieties at present. Due to their advantages of energy saving, high efficiency, and environmental protection, UV-curable coatings are an environmentally friendly coating variety that has emerged in my country in the past 20 years. With the rapid development of science and technology and modern industry, ultraviolet (UV) curing materials are outstanding in today's material field. As a key component of UV-curable materials, photoinitiators are widely used in the fields of UV-curable coatings, inks, adhesives, microelectronics and printing plates. [0003] Since the concept of photoinitiators was first proposed in 1968 in the environmentally frien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C09D175/14
CPCC08G18/672C09D175/14
Inventor 余宗萍淳生前
Owner 瑞通高分子科技(浙江)有限公司
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