Thioxanthone photo-initiation group modified third-generation dendritic LED resin

A thioxanthone photo-initiating-based technology, applied in applications, coatings, inks, etc., can solve problems such as poor solubility, and achieve excellent flexibility, high self-initiating efficiency, and shortening spacing.

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-dimethylthi...

Method used

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  • Thioxanthone photo-initiation group modified third-generation dendritic LED resin
  • Thioxanthone photo-initiation group modified third-generation dendritic LED resin
  • Thioxanthone photo-initiation group modified third-generation dendritic LED resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of the third generation dendritic polymer HPB-3p, the steps are as follows: add 15.6 parts of neopentyl glycol, 40.6 parts of 2,2-dimethylol propionic acid, 12.5 parts of xylene, and 0.2 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 140-150°C for reflux reaction for 1-2 hours. When the detected acid value is lower than 25mgKOH / g, add 80.4 parts of 2,2-dimethylolpropionic acid, 0.4 parts of p-toluenesulfonic acid and 16.0 parts of xylene, reflux reaction at 140~150℃ for 1~2h, when the detected acid value is lower than 25mgKOH / g, then Add 160.8 parts of 2,2-dimethylol propionic acid, 0.8 parts of p-toluenesulfonic acid and 32.0 parts of xylene respectively, after reflux reaction at 140-150°C for 2 hours, then raise the temperature to 170°C and continue the reaction until the detected acid value is low Stop...

Embodiment 2

[0049] Preparation of the third generation dendritic polymer HPB-3b: 15.6 parts of neopentyl glycol, 44.4 parts of 2,2-dimethylolbutyric acid (DMBA), 13.0 parts of xylene, 0.25 parts of catalyst p-toluenesulfonic acid were added to In a four-necked flask equipped with a stirrer, a thermometer, an addition funnel and a reflux water separator, under nitrogen protection, heat to 105-120°C and reflux for 1-2 hours. When the detected acid value is lower than 25mgKOH / g, add 88.8 Part of 2,2-dimethylolbutyric acid, 0.5 part of p-toluenesulfonic acid and 20.0 parts of xylene, reflux at 105-120°C for 1-2 hours, when the detected acid value is lower than 25mgKOH / g, separate Add 177.6 parts of 2,2-dimethylolbutyric acid, 0.75 parts of p-toluenesulfonic acid and 35.0 parts of xylene, reflux at 105-120°C for 2 hours, then raise the temperature to 150°C and continue the reaction until the detected acid value is lower than Stop the reaction at 20mgKOH / g; distill out xylene under reduced pres...

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 third-generation dendritic LED (light-emitting diode) resin and a preparation method thereof. Neopentyl glycol is used as a core, a dendritic 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 dendritic 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, LED wood coating, LED alloy coating, LED circuit board ink and LED plastic coating.

Description

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

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/02C08G83/00C09D167/06C09D187/00C09D11/101
CPCC08G63/91C08G63/02C08G83/003C08G83/004C09D167/06C09D187/00C09D11/101
Inventor 许钧强康伦国姚东生
Owner SHAOGUAN HEZHONG CHEM CO LTD
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