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Modified third-generation dendritic self-initiation UV resin containing double-type photo-initiation groups

A photo-initiated and dendritic technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problem of poor solubility of α-hydroxyketone photoinitiators, and achieve high self-initiation efficiency and strong cross-linking density , the effect of excellent flexibility

Inactive Publication Date: 2021-11-02
金色摇篮新材料股份公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] α-Hydroxy ketone photoinitiators are currently the most widely used class of photoinitiators, and have high initiating activity, such as 1173, 184, which will produce certain pungent odors and harmful substances (benzaldehyde, etc.) after cracking; 2959 has high initiation activity, excellent yellowing resistance and low odor; but the solubility of α-hydroxyketone photoinitiators is not good

Method used

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  • Modified third-generation dendritic self-initiation UV resin containing double-type photo-initiation groups
  • Modified third-generation dendritic self-initiation UV resin containing double-type photo-initiation groups
  • Modified third-generation dendritic self-initiation UV resin containing double-type photo-initiation groups

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of the 3rd generation dendritic polymer HPB-3, the steps are as follows: add 15.6 parts of neopentyl glycol, 40.6 parts of 2,2-dimethylolpropionic 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-dimethylolpropionic acid, 0.8 parts of p-toluenesulfonic acid and 32.0 parts of xylene respectively, and after reflux reaction at 140-150 ° C for 2 hours, the temperature is raised to 180 ° C to continue the reaction until the detected acid value is low Sto...

Embodiment 2

[0049] Preparation of isocyanate-acrylic acid functional monomer TDI-HEMA: Add 104.4 parts of TDI-80 and 0.07 parts of DBTDL into a four-neck flask equipped with a reflux condenser, thermometer, dropping funnel and stirrer, stir and raise the temperature, at 30-45°C Slowly add a mixture of 78.0 parts of methacrylate-α-hydroxyethyl methacrylate, 0.12 parts of hydroquinone and 40.0 parts of acetone dropwise, after the addition is complete, raise the temperature to 45-50°C to continue the reaction for 3.5 hours, and then take samples every 30 minutes The NCO value of the system was detected, and the reaction was stopped when the detected NCO value was half of the initial value, and the temperature was lowered to 40°C to prepare the isocyanate-acrylic acid functional monomer TDI-HEMA.

Embodiment 3

[0051] Preparation of isocyanate-acrylic acid functional monomer IPDI-HEA: Add 44.5 parts of IPDI and 0.03 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 23.2 parts of β-hydroxyethyl acrylate, 0.03 parts of hydroquinone and 20.0 parts of acetone. After the addition is complete, raise the temperature to 45-50°C to continue the reaction for 3 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 IPDI-HEA.

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Abstract

The invention relates to modified third-generation dendritic self-initiation UV resin containing double-type photo-initiation groups and a preparation method of the modified third-generation dendritic self-initiation UV resin. The UV resin containing the double-type photo-initiation groups takes neopentyl glycol as a core and a dendritic three-dimensional structure as a shell, and contains a plurality of functional active groups, a plurality of double-type photo-initiation groups and a plurality of branched-chain bulk alkane groups; the UV resin disclosed by the invention has a dendritic hyperbranched ball structure, high solid content, low viscosity, pigment bearing property and storage stability; the self-initiation efficiency is higher, the curing speed is higher, the crosslinking density is higher, and the defects caused by a single light guide agent are overcome; and the dendritic UV resin containing the double-type photo-initiation groups prepared by the preparation method has excellent adhesive force, water resistance, aging resistance, chemical resistance and pollution resistance, also has high gloss, high wear resistance, high fullness, strong impact resistance and good flexibility, and can be used for UV colored floor coatings, UV wood coatings, UV alloy coatings, UV circuit board ink and UV plastic coatings.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/71C09D175/14
CPCC08G18/714C08G18/3206C08G18/3275C09D175/14
Inventor 许钧强王茵键
Owner 金色摇篮新材料股份公司
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