Thioxanthone photo-initiation group modified second-generation hyperbranched LED resin

A thioxanthone photo-initiating-based technology, applied in applications, coatings, inks, etc., can solve problems such as poor solubility, achieve excellent flexibility, shorten spacing, and improve photosensitivity.

Inactive Publication Date: 2021-11-30
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-dimethylthiaxa

Method used

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  • Thioxanthone photo-initiation group modified second-generation hyperbranched LED resin
  • Thioxanthone photo-initiation group modified second-generation hyperbranched LED resin
  • Thioxanthone photo-initiation group modified second-generation hyperbranched LED resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Prepare the 2nd generation hyperbranched polymer HPB-2p, its step is as follows: join by 27.2 parts of pentaerythritol, 108.2 parts of 2,2-dimethylolpropionic acid, 30.0 parts of xylene, 0.55 parts of catalyst p-toluenesulfonic acid In the four-necked flask with stirrer, thermometer, adding funnel and reflux water separator, heat to 140-160°C under nitrogen protection and reflux for 4 hours under normal pressure. When the detected acid value is lower than 25mgKOH / g, add 216.4 parts of 2 , 2-Dimethylol propionic acid, 1.1 parts of p-toluenesulfonic acid and 40.0 parts of xylene, reflux at 140-160°C for 2 hours at normal pressure, then reduce the pressure to 1.2KPa for 2 hours and then stop the pressure reduction. Stop the reaction when the acid value is lower than 20mgKOH / g; evaporate 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, filter, vacuum dry at 50°C, and ob...

Embodiment 2

[0049] Preparation of the 2nd generation hyperbranched polymer HPB-2b: Add 27.2 parts of pentaerythritol, 120.0 parts of 2,2-dimethylolbutyric acid (DMBA), 32.0 parts of xylene, 0.5 parts of catalyst p-toluenesulfonic acid into a stirring In a four-necked flask with a thermometer, a thermometer, an addition funnel, and a reflux water separator, heat it under nitrogen protection to 105-120°C under normal pressure and reflux for 4 hours. When the detected acid value is lower than 25mgKOH / g, add 240.0 parts of 2, 2-Dihydroxymethylbutyric acid, 1.1 parts of p-toluenesulfonic acid and 40.0 parts of xylene, reflux at 105-120°C for 2 hours at normal pressure, then reduce the pressure to 1.2KPa for 2 hours and then stop the pressure reduction. Stop the reaction when the acid value is lower than 20mgKOH / g; evaporate the xylene under reduced pressure, add 85.0 parts of acetone after cooling, dissolve completely, add 120.0 parts of toluene and stir, let stand to precipitate a precipitate,...

Embodiment 3

[0051] Preparation of isocyanate-acrylic acid functional monomer TDI-HEA: Add 87.0 parts of TDI-80 and 0.05 parts of DBTDL to a four-necked flask equipped with a reflux condenser, a thermometer, a dropping funnel and a stirrer, and stir to raise the temperature. Slowly add a mixture of 58.0 parts of β-hydroxyethyl acrylate, 0.1 parts of hydroquinone and 40.0 parts of acetone dropwise. After the addition is completed, the temperature is raised to 45-50°C to continue the reaction for 4 hours, and then samples are taken every 30 minutes to detect the NCO value, 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 TDI-HEA.

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Abstract

The invention relates to thioxanthone photo-initiation group modified second-generation hyperbranched LED (light-emitting diode) resin and a preparation method thereof. Pentaerythritol is used as a core, a hyperbranched structure is used as a shell, and the resin contains a plurality of functional active groups, thioxanthone photo-initiation groups and branched chain bulk alkane groups. The 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 resin has a high solid content, low viscosity, pigment bearing performance and storage stability; and (5) the defects caused by a small-molecule photo-initiator 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 coatings, LED wood coatings, LED alloy coatings, LED circuit board ink and LED plastic coatings.

Description

technical field [0001] The invention relates to a modified self-initiating UV resin, in particular to a second-generation 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 indust...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/02C08G83/00C09D167/06C09D187/00C09D11/101
CPCC08G63/91C08G63/02C08G83/005C08G83/006C09D167/06C09D187/00C09D11/101
Inventor 许钧强康伦国姚东生郭红桥孙小光
Owner SHAOGUAN HEZHONG CHEM CO LTD
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