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Degradable light-cured resin and preparation method and application thereof

A light-curing resin, unsaturated technology, applied in coatings, polyester coatings, etc., can solve the problems of low curing crosslink density and poor hardness, achieve excellent hardness and mechanical properties after curing, high production efficiency, and improve The effect of crosslink density

Active Publication Date: 2020-08-07
上海抚佳精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects such as low cured crosslink density and poor hardness in the degradable photocurable resin in the prior art, thereby Provide a kind of degradable photocurable resin and its preparation method and application

Method used

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  • Degradable light-cured resin and preparation method and application thereof
  • Degradable light-cured resin and preparation method and application thereof
  • Degradable light-cured resin and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a degradable photocurable resin, the preparation method of which is as follows:

[0038] After lactide and ethylene glycol are mixed evenly according to the molar ratio of 6.8:1, add stannous octoate (the amount of stannous octoate accounts for 0.5% of the total mass of lactide and ethylene glycol), and then heat up to 120°C , After reacting for 4 hours, the polylactic acid diol was obtained; the number average molecular weight of the polylactic acid diol was determined to be 1000.

[0039] Add 200 g of the above-mentioned polylactic acid diol, 41.19 g of maleic anhydride and 0.24 g of 4-methylaminopyridine into a four-necked flask with a stirring device, and then raise the temperature to 70° C. After 2 hours of reaction, detect the acid value of the system, when When the acid value of the reaction system is less than 100mgKOH / g, add 48.5g hydroxyethyl acrylate, 0.1g hydroquinone and 0.18g dibutyltin dilaurate, then raise the temperature to 160°...

Embodiment 2

[0041] This embodiment provides a degradable photocurable resin, the preparation method of which is as follows:

[0042] After lactide and 1,3-propanediol are mixed evenly according to the molar ratio of 14:1, add stannous octoate (the addition of stannous octoate accounts for 0.5% of the total mass of lactide and 1,3-propanediol), and then After raising the temperature to 120°C and reacting for 4 hours, the polylactic acid diol was obtained; the number average molecular weight of the polylactic acid diol was determined to be 2000.

[0043] Add 200 g of the above-mentioned polylactic acid diol, 21.57 g of maleic anhydride and 0.22 g of triethylamine into a four-necked flask with a stirring device, and then raise the temperature to 70°C. After 2 hours of reaction, detect the acid value of the system. When the value is less than 60mgKOH / g, add 27.5g hydroxypropyl acrylate, 0.1g 4-methoxyphenol and 0.13g bismuth isooctanoate, then raise the temperature to 140°C and continue the r...

Embodiment 3

[0045] This embodiment provides a degradable photocurable resin, the preparation method of which is as follows:

[0046] After lactide and 1,3-propanediol are mixed evenly according to the molar ratio of 20.5:1, add stannous octoate (the addition of stannous octoate accounts for 0.5% of the total mass of lactide and 1,3-propanediol), and then After raising the temperature to 120°C and reacting for 4 hours, the polylactic acid diol was obtained; the number average molecular weight of the polylactic acid diol was determined to be 3000.

[0047] Add 200g of the above-mentioned polylactic acid diol, 16.52g of itaconic anhydride and 0.20g of 4-methylaminopyridine into a four-necked flask with a stirring device, then raise the temperature to 70°C, and react for 2 hours to detect the acid value of the system. When the acid value of the system is less than 40mgKOH / g, add 25.6g hydroxyethyl acrylate, 0.05g p-hydroxyanisole and 0.11g n-butyl titanate, then raise the temperature to 180°C a...

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Abstract

The invention provides degradable light-cured resin and a preparation method and application thereof. The degradable light-cured resin comprises the following raw materials in parts by weight: 200 parts of polylactic acid diol, 10 to 42 parts of unsaturated cyclic anhydride or olefinic-bond-containing binary acid and 9 to 55 parts of an end-capping reagent, wherein the number-average molecular weight of the polylactic acid diol is 400 to 4000. According to the degradable light-cured resin provided by the invention, the solubility of the degradable light-cured resin in a reactive diluent can beimproved by limiting the number-average molecular weight of the polylactic acid diol; the polylactic acid diol and the unsaturated cyclic anhydride or olefinic-bond-containing binary acid are adoptedas raw materials, and the number-average molecular weight of the polylactic acid diol is limited, so the curing crosslinking density, hardness and mechanical properties of a cured product can be improved; and moreover, the end-capping reagent is not limited to be compounds containing reactive groups such as double bonds or epoxy groups, so the selection range of the end-capping reagent is expanded.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a degradable photocurable resin and its preparation method and application. Background technique [0002] Photocurable resin is a photosensitive resin with a relatively low molecular weight, which has reactive groups such as unsaturated double bonds or epoxy groups, and can activate photoinitiators for curing reactions under ultraviolet or visible light irradiation. It has the characteristics of fast curing speed, less pollution, energy saving, and excellent performance of cured products, so it is widely used in coatings, printing, adhesives, optical fibers, optical discs, and electronic components or electronic devices. However, general light-curable resins are difficult to degrade after curing, and a large amount of use will cause certain pollution to the environment. [0003] Aiming at the defect that the photocurable resin is difficult to degrade after curing, rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C09D167/06
CPCC08G63/912C09D167/06
Inventor 郭彦彬李玉博
Owner 上海抚佳精细化工有限公司
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