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Thioxanthone polyurethane modified epoxy acrylate LED light-cured resin

A technology of thioxanthone polyurethane and epoxy acrylate, applied in polyurea/polyurethane coatings, applications, coatings, etc., can solve problems such as poor solubility, and achieve easy reaction, excellent adhesion, and excellent system compatibility Effect

Inactive Publication Date: 2021-11-26
明光科迪新材料有限公司
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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 light-cured resin
  • Thioxanthone polyurethane modified epoxy acrylate LED light-cured resin
  • Thioxanthone polyurethane modified epoxy acrylate LED light-cured resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A thioxanthone polyurethane modified epoxy acrylate LED photocurable resin A:

[0043] a) Preparation of epoxy acrylate E44A: Add 136.3 parts of bisphenol A epoxy resin E-44 into 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 43.2 parts of acrylic acid, 4.5 parts of N,N-dimethylaniline and 0.5 part of p-hydroxyanisole, after the addition is complete, 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;

[0044] b), preparation of isocyanate-acrylic acid functional monomer TDI-HEMA: add 52.0 parts of TDI-80 and 0.03 part of DBTDL in a four-necked flask equipped with a reflux condenser, a thermometer, a dropping funnel and a stirrer, stir and heat u...

Embodiment 2

[0050] A thioxanthone polyurethane modified epoxy acrylate LED photocurable resin B:

[0051] a) Preparation of epoxy acrylate E51A: Add 78.4 parts of bisphenol A epoxy resin E-51 into 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 34.4 parts of methacrylic acid, 2.8 parts of catalyst (the mass ratio of N,N-dimethylaniline to tetrabutylammonium bromide is 1:1) and 0.34 parts of 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;

[0052] b) Preparation of isocyanate-acrylic acid functional monomer IPDI-HEA: Add 44.5 parts of IPDI and 0.03 parts of DBTDL into a four-neck flask equipped with a reflux condenser, thermome...

Embodiment 3

[0058] A thioxanthone polyurethane modified epoxy acrylate LED photocurable resin C:

[0059] a) Preparation of epoxy acrylate E51A: Add 78.4 parts of bisphenol A epoxy resin E-51 into 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 34.4 parts of methacrylic acid, 2.8 parts of catalyst (the mass ratio of N,N-dimethylaniline to tetrabutylammonium bromide is 1:1) and 0.34 parts of 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;

[0060] b) Preparation of isocyanate-acrylic acid functional monomer HDI-HEA: Add 33.6 parts of HDI and 0.02 parts of DBTDL into a four-necked flask equipped with a reflux condenser, a thermo...

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Abstract

The invention relates to thioxanthone polyurethane modified epoxy acrylate LED light-cured resin and a preparation method thereof. The LED light-cured resin contains three 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; under the irradiation of a UV-LED 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 thioxanthone LED light-cured resin prepared by the invention has excellent adhesive force, water resistance, aging resistance, chemical resistance and coating odor removal property, also has the characteristics of high gloss, high wear resistance, high fullness, strong impact resistance, good flexibility and the like, and is widely applied to UV floor coatings, UV wood coatings, UV alloy coatings, UV circuit board ink, UV plastic coatings and the like.

Description

technical field [0001] The invention relates to a modified self-initiating photocurable resin, in particular to a thioxanthone polyurethane modified epoxy acrylate LED photocurable 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] Epoxy resin is widely used due to its excellent adhesion, heat resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/67C08G18/32C08G18/38C09D175/14C09D11/101C09D11/102
CPCC08G18/12C08G18/6705C08G18/672C08G18/3215C09D175/14C09D11/101C09D11/102C08G2150/00C08G18/288
Inventor 陆子菲陆明许钧强匡民明
Owner 明光科迪新材料有限公司
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