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Thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin

A thioxanthone polyurethane, epoxy acrylate technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor solubility, achieve strong impact resistance, improve photosensitivity, and excellent system compatibility Effect

Inactive Publication Date: 2021-11-02
英德科迪颜料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commercialized are 2-chlorothioxanthone (CTX), 2-isopropylthioxanthone (ITX), 2-hydroxythioxanthone (HTX), 2,4-dimethylthiaxanthone Anthrone (RTX) and 2,4-diethylthioxanthone (DETX), but TX photoinitiators are poorly soluble in oligomers and reactive diluents

Method used

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  • Thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin
  • Thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin
  • Thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin, its preparation steps are as follows:

[0042] a) Preparation of epoxy acrylate E44A: add 0.3mol bisphenol A epoxy resin E-44 to a four-necked flask equipped with a reflux condenser, thermometer, dropping funnel and stirrer, and wait until the temperature rises to 80°C Slowly add dropwise a mixture of 0.6mol acrylic acid, 1.0g N,N-dimethylaniline and 0.3g p-hydroxyanisole, after the dropwise addition, slowly raise the temperature to 85-90°C, keep the temperature for 3 hours, and then take samples every 40 minutes Detect the acid value of the system, stop the reaction when the detected acid value is lower than 5mgKOH / g, and prepare epoxy acrylate E44A;

[0043] b), preparation of 2-(2-hydroxyl-)ethoxythioxanthone (HETX): in the reaction flask equipped with stirring, thermometer and feeding device, add 85g of 98% concentrated sulfuric acid, cool to -5~0℃, add 0.1mol 2,2'-dithiodibenzoic...

Embodiment 2

[0048] A kind of thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin, its preparation steps are as follows:

[0049] a) Preparation of epoxy acrylate E51A: add 0.3mol bisphenol A epoxy resin E-51 to a four-necked flask equipped with a reflux condenser, thermometer, dropping funnel and stirrer, and wait until the temperature rises to 80°C Slowly add dropwise a mixture of 0.6mol methacrylic acid, 2.4g catalyst (the mass ratio of N,N-dimethylaniline to tetrabutylammonium bromide is 1:1) and 0.3g p-hydroxyanisole, dropwise After completion, slowly raise the temperature to 85-90°C, keep it warm for 3 hours, then take samples every 30 minutes to detect the acid value of the system, stop the reaction when the detected acid value is lower than 5mgKOH / g, and prepare epoxy acrylate E51A;

[0050] b), preparation of 2-(2-hydroxyl-)ethoxythioxanthone (HETX): in the reaction flask equipped with stirring, thermometer and feeding device, add 85g of 98% concentrated sul...

Embodiment 3

[0055] A kind of thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin, its preparation steps are as follows:

[0056] a) Preparation of epoxy acrylate E51A: add 0.3mol bisphenol A epoxy resin E-51 to a four-necked flask equipped with a reflux condenser, thermometer, dropping funnel and stirrer, and wait until the temperature rises to 80°C Slowly add dropwise a mixture of 0.6mol methacrylic acid, 2.4g catalyst (the mass ratio of N,N-dimethylaniline to tetrabutylammonium bromide is 1:1) and 0.3g p-hydroxyanisole, dropwise After completion, slowly raise the temperature to 85-90°C, keep it warm for 3 hours, then take samples every 30 minutes to detect the acid value of the system, stop the reaction when the detected acid value is lower than 5mgKOH / g, and prepare epoxy acrylate E51A;

[0057]b), preparation of 2-(2-hydroxyl-)ethoxythioxanthone (HETX): in the reaction flask equipped with stirring, thermometer and feeding device, add 85g of 98% concentrated sulf...

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Abstract

The invention relates to thioxanthone polyurethane modified epoxy acrylate LED-UV water-based resin and a preparation method thereof. The LED-UV water-based resin contains two active groups and a thioxanthone photo-initiation group, and has the following characteristics that: 1) energy migration and intermolecular reaction in a polymer chain are easier, and under the irradiation of an LED-UV lamp, high self-initiation activity is realized; 2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; 3) the system compatibility is excellent; and 4) the defects caused by a small-molecule photoinitiator are overcome. The prepared LED-UV water-based resin has excellent adhesive force, water resistance, aging resistance, chemical resistance and odor removal effect, also has the characteristics of high gloss, high wear resistance, high fullness, impact resistance, good flexibility and the like, and is widely applied to LED colored perfume bottle coatings, LED wood coatings, LED alloy coatings, LED circuit board ink, LED plastic coatings and the like.

Description

technical field [0001] The invention relates to a water-based photocurable resin, in particular to a thioxanthone polyurethane-modified epoxy acrylate LED-UV water-based resin and a preparation method thereof, belonging to the technical field of synthetic resins. Background technique [0002] In recent years, environmentally friendly coatings, including high solids and solvent-free coatings, water-based coatings, powder coatings and light-curing coatings, have achieved rapid development. UV curing has the advantages of fast response, room temperature operation, low energy consumption, no solvent and less pollution. Light curing technology has been widely used in printing, packaging, advertising, building materials, decoration, electronics, communications, computers, home furnishings, etc. Shops, automobiles, aviation, aerospace, instrumentation, sports, health and many other industries. [0003] Water-based UV resins are mainly used in UV coatings and UV inks, including wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/67C09D175/14
CPCC08G18/3855C08G18/673C09D175/14
Inventor 陆明许钧强匡民明
Owner 英德科迪颜料技术有限公司
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