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Thioxanthone photo-initiation group modified hyperbranched LED resin

A thioxanthone light and initiator technology, applied in the direction of coating, can solve problems such as poor solubility, and achieve the effects of excellent flexibility, improved photosensitivity, and excellent system compatibility

Inactive Publication Date: 2021-12-10
SHAOGUAN HEZHONG CHEM CO LTD +1
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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 photo-initiation group modified hyperbranched LED resin
  • Thioxanthone photo-initiation group modified hyperbranched LED resin
  • Thioxanthone photo-initiation group modified hyperbranched LED resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of hyperbranched polymer HPB-p: Add 26.8 parts of trimethylolpropane (TMP), 80.5 parts of 2,2-dimethylolpropionic acid (DMPA), 25.0 parts of xylene, and 0.4 parts of catalyst p-toluenesulfonic acid Put it into a four-necked flask equipped with a stirrer, a thermometer, an addition funnel, and a reflux water separator, and heat it under nitrogen protection to 150-170°C for reflux reaction at normal pressure for 4 hours. When the detected acid value is lower than 25mgKOH / g, add 161.0 parts of 2,2-dimethylol propionic acid, 0.8 parts of p-toluenesulfonic acid and 30.0 parts of xylene, reflux at 150-170°C for 2 hours under normal pressure, then reduce the pressure to 1.2KPa for 2 hours, then stop the pressure reduction , stop the reaction when the detected acid value is lower than 20mgKOH / g; distill out xylene under reduced pressure, add 50.0 parts of acetone after cooling, dissolve completely, add 80.0 parts of toluene and stir, let stand to precipitate precipit...

Embodiment 2

[0049] Preparation of hyperbranched polymer HPB-b: Add 26.8 parts of trimethylolpropane (TMP), 89.7 parts of 2,2-dimethylolbutyric acid (DMBA), 30.0 parts of xylene, and 0.45 parts of catalyst p-toluenesulfonic acid Put it into a four-necked flask equipped with a stirrer, a thermometer, an addition funnel, and a reflux water separator, and heat it under nitrogen protection to 105-120°C for reflux reaction at normal pressure for 4 hours. When the detected acid value is lower than 25mgKOH / g, add 179.4 parts of 2,2-dimethylolbutyric acid, 0.9 parts of p-toluenesulfonic acid and 40.0 parts of xylene, reflux at 140-170°C for 2 hours, then reduce the pressure to 1.2KPa for 2 hours, then stop the pressure reduction , stop the reaction when the detected acid value is lower than 20mgKOH / g; distill out xylene under reduced pressure, add 80.0 parts of acetone after cooling, dissolve completely, add 120.0 parts of toluene and stir, let stand to precipitate precipitate, filter with suction,...

Embodiment 3

[0051] Preparation of isocyanate-acrylic acid functional monomer MDI-HEA: Add 150.0 parts of MDI and 0.08 parts of DBTDL to a four-necked flask equipped with a reflux condenser, a thermometer, a dropping funnel and a stirrer, stir to raise the temperature, and slowly Add dropwise a mixture of 70.0 parts of β-hydroxyethyl acrylate, 0.1 parts of hydroquinone and 50.0 parts of acetone. After the addition is complete, raise the temperature to 45-50°C to continue the reaction for 4 hours, and then take samples every 30 minutes to detect the NCO value of the system , when the detected NCO value is half of the initial value, the reaction is stopped, and the temperature is lowered to 40°C to prepare the isocyanate-acrylic acid functional monomer MDI-HEA.

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Abstract

The invention relates to a thioxanthone photo-initiation group modified hyperbranched LED resin and a preparation method thereof, wherein the thioxanthone photo-initiation group modified hyperbranched LED resin takes TMP as a core and a hyperbranched unit as a shell, and contains a plurality of functional active groups, a plurality of thioxanthone photo-initiation groups and a plurality of branched chain bulk alkane groups. The thioxanthone photo-initiation group modified hyperbranched LED resin has the characteristics that 1) energy migration and intermolecular reaction in a polymer chain are easier, and the self-initiation efficiency is high; 2) the distance between a photoactive group and a main chain is shortened, and the photosensitivity is improved; 3) the system compatibility is excellent; 4) the thioxanthone photo-initiation group modified hyperbranched LED resin has characteristics of high solid content, low viscosity, pigment bearing performance and storage stability; and 5) the defects caused by a small-molecule photoinitiator are overcome. The hyperbranched LED resin prepared by the invention has excellent flexibility, adhesive force, chemical resistance, heat resistance, aging resistance, oil resistance, wear resistance, pollution resistance and impact strength, is odorless in coating, and is used for LED colored floor coating materials, LED woodware coating materials, LED alloy coating materials, LED circuit board ink and LED plastic coating materials.

Description

technical field [0001] The invention relates to a modified self-initiating UV resin, in particular to a hyperbranched LED resin modified by a thioxanthone photoinitiating group 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. Light curing technology has the advantages of fast curing, high production efficiency, room temperature operation, low energy consumption, low VOC, environmental protection, high quality, economy, and is suitable for a variety of substrates. It has been widely used in printing, packaging, advertising, building materials, decoration, electronics, etc. , communications, computers, stores, automobiles, aviation, aerospace, instrumentation, sports, health and many other industries. [0003] As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09D201/00
CPCC08G83/005C08G83/006C09D201/005
Inventor 许钧强周利军周强富
Owner SHAOGUAN HEZHONG CHEM CO LTD
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