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Visible light initiating system capable of initiating free radical/cation polymerization

A technology of initiating system and visible light, which is applied in the field of visible light initiating system, can solve the problems of complex structure, expensive, limited to theoretical research, etc., and achieve the effect of improving free radical initiating ability, improving application performance and improving compatibility

Inactive Publication Date: 2016-01-06
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The visible light-initiated systems reported in the current literature either have complex structures, or weak absorption in the visible light region, or have poor compatibility with hydrophobic curing systems, or are expensive
Although there is an advantage in a certain aspect, it is only limited to theoretical research, and there is still a long way to go before reaching industrial application.

Method used

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  • Visible light initiating system capable of initiating free radical/cation polymerization
  • Visible light initiating system capable of initiating free radical/cation polymerization
  • Visible light initiating system capable of initiating free radical/cation polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A visible light initiation system that initiates free radicals and cationic polymerization, its components are as follows:

[0035] The first component: integrated photosensitizer (self-made) 0.5%, its structure is as follows:

[0036]

[0037] Second component: co-initiator, ethyl 4-dimethylaminobenzoate 0.5%;

[0038] The third component: synergist, diphenyliodonium hexafluorophosphate 2.6%;

[0039] Prepare the visible light triggering system according to the above-mentioned ratio, and add the visible light triggering system to the free radical polymerizing monomer: 1,6-hexanediol diacrylate based on the weight of the free radical polymerizing monomer as 100%, and mix thoroughly to obtain a transparent Clear light curing reaction solution.

[0040] The synthetic method of self-made integrated photosensitizer is divided into the following steps:

[0041] In the first step, 24mmol of 18-crown-6, 60mmol of anhydrous potassium fluoride and 120mmol of 1,2-dibromoethan...

Embodiment 2

[0048] The ratio of each component of a visible light initiation system for initiating free radical and cationic polymerization is the same as that of Example 1.

[0049] Based on the weight of the polymerized monomer as 100%, add the photoinitiating system to the cationic polymerized monomer: 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexyl carboxylate, and mix thoroughly to obtain a transparent and clear Photocuring reaction solution.

[0050] The photopolymerization reaction was the same as in Example 1.

Embodiment 3

[0052] The ratio of each component of a visible light initiation system for initiating free radical and cationic polymerization is the same as that of Example 1.

[0053] Based on the total weight of the cationic monomer and the free radical monomer as 100%, the photoinitiating system is added to 50% of the cationic monomer: 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexyl carboxylate , 50% free radical monomer: 1,6-hexanediol diacrylate hybrid resin system is fully mixed to obtain a transparent and clear photocuring reaction solution.

[0054] The photopolymerization reaction is the same as in Example 1, except that the photopolymerization space of Photo-DSC is filled with high-purity air, and only the photopolymerization of the hybrid system in air is investigated.

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Abstract

The invention belongs to the technical field of visible light curing, and particularly relates to a visible light initiating system capable of initiating free radical / cation polymerization. The system comprises the following components in parts by weight: 0.5-1 part of an integral photosensitizer as a first component, 0.5-1 part of a coinitiator as a second component and 1-3 parts of a photosensitive synergist as a third component, wherein the formula of the integral photosensitizer is shown in the description; the coinitiator is one of fatty amine and aromatic amine derivative; the photosensitive synergist is one of iodonium salt, sulfonium salt and phosphonium salt. Compared with the common reported visible light initiating system, the visible light initiating system has the advantages that the light sensitive wave band is longer, the light absorption capability is stronger, the molecular structure is simple, the preparation is easy, the cost is low, and the visible light initiating system has good compatibility with hydrophobic light-cured resin, can effectively initiate free radical / cation photopolymerization, and has industrialized application potential.

Description

technical field [0001] The invention belongs to the technical field of visible light curing, in particular to a visible light initiating system for initiating radical and cationic polymerization. Background technique [0002] UV curing technology has been widely used in many industrial fields such as: printing, ink, coating, adhesives, optical devices, electronic circuits, etc. In recent years, it has also been involved in emerging digital storage, three-dimensional precision machining and other fields. Compared with thermal polymerization or thermal curing, it has the characteristics of fast curing rate, simple equipment, small footprint, room temperature operation, less pollution, and excellent performance of cured products. It is an environmentally friendly green technology. However, there are many weaknesses in UV curing: ① UV radiation is harmful to the human body, poor in environmental protection and safety, and requires high equipment; Strong absorption, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/50C08F122/14C08G59/68C08G59/24G01N25/20
Inventor 邵建中南旭莹黄益范钦国张海东
Owner ZHEJIANG SCI-TECH UNIV
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