Ultraviolet light curable high-strength polyurethane acrylate resin and preparation method thereof

A urethane acrylate and hydroxy acrylate technology, applied in the field of materials, can solve the problems of easy warpage and cracking of light-cured thick products, limited thickness of light-cured products, low strength and high brittleness of light-cured products, etc. Activity, optimized synthesis route, outstanding effect of mechanical properties

Inactive Publication Date: 2018-08-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a UV curable high Strength polyurethane acrylate (PUA) resin and preparation method thereof

Method used

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  • Ultraviolet light curable high-strength polyurethane acrylate resin and preparation method thereof
  • Ultraviolet light curable high-strength polyurethane acrylate resin and preparation method thereof
  • Ultraviolet light curable high-strength polyurethane acrylate resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The first step, in the there-necked flask that thermometer, mechanical stirrer are equipped with, add metered isophorone diisocyanate 222g (-NCO: 2mol), catalyst dibutyltin dilaurate 0.552g (0.1wt%), polymerization inhibitor Agent 4-hydroxypiperidinol oxygen radical 0.182g (0.033wt%), after stirring evenly, dropwise add 130g (—OH: 1mol) of hydroxyethyl methacrylate in the three-necked flask with the constant pressure dropping funnel, control drop Acceleration, keep the system temperature at about 50°C, and keep the temperature at 60°C for 2 hours after the dropwise addition is completed. In the middle, the change of the NCO group content in the system was determined by the di-n-butylamine method. When the -NCO group content reaches the theoretical value, the intermediate product of the first step is obtained.

[0031]In the second step, 200 g (PAPP400-2, —OH: 1mol) of phthalic anhydride polyester diol with a molecular weight of 400 is added dropwise to the intermediate...

Embodiment 2

[0034] The first step, in the there-necked flask that thermometer, mechanical stirrer are equipped with, add metered isophorone diisocyanate 222g (-NCO: 2mol), catalyst dibutyltin dilaurate 0.485g (0.1wt%), polymerization inhibitor Agent 4-hydroxypiperidinol oxygen radical 0.160g (0.033wt%), after stirring evenly, dropwise add 130g (-OH: 1mol) of hydroxyethyl methacrylate in the three-necked flask with the constant pressure dropping funnel, control drop Acceleration, keep the system temperature at about 50°C, and keep the temperature at 60°C for 2 hours after the dropwise addition is completed. In the middle, the change of the NCO group content in the system was determined by the di-n-butylamine method. When the -NCO group content reaches the theoretical value, the intermediate product of the first step is obtained.

[0035] In the second step, phthalic anhydride polyester trihydric alcohol 133.3g (PAPP400-3, —OH: 1mol) with a molecular weight of 400 is added dropwise to the ...

Embodiment 3

[0038] The first step, in the there-necked flask that thermometer, mechanical stirrer are equipped with, add metered isophorone diisocyanate 222g (-NCO: 2mol), catalyst dibutyltin dilaurate 0.452g (0.1wt%), polymerization inhibitor Agent 4-hydroxypiperidinol oxygen free radical 0.149g (0.033wt%), after stirring evenly, dropwise add 130g (—OH: 1mol) of hydroxyethyl methacrylate in the three-necked flask with the constant pressure dropping funnel, control dropwise Acceleration, keep the system temperature at about 50°C, and keep the temperature at 60°C for 3h after the dropwise addition is completed. In the middle, the change of the NCO group content in the system was determined by the di-n-butylamine method. When the -NCO group content reaches the theoretical value, the intermediate product of the first step is obtained.

[0039] In the second step, 100 g (PAPP400-4, —OH: 1mol) of phthalic anhydride polyester tetrahydric alcohol (PAPP400-4, —OH: 1mol) with a molecular weight o...

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Abstract

The invention relates to ultraviolet light curable high-strength polyurethane acrylate resin and a preparation method thereof. The resin is composed of the following components: 50-80 wt% of polyurethane acrylate and 20-50 wt% of a reactive diluent, wherein the polyurethane acrylate is composed of the following materials: 32-50 wt% of diisocyanate, 19-29 wt% of hydroxyacrylate, 22-49 wt% of a polyester polyol, 0.05-0.3 wt% of a catalyst, and 0.02-0.05 wt% of a polymerization inhibitor; and the method comprises the following steps: 1, mixing the diisocyanate (-NCO: 2 mol), the catalyst, the polymerization inhibitor and the hydroxyacrylate (-OH: 1 mol), and performing a reaction for 2-5 h at the temperature of 45-65 DEG C to obtain a first step product; 2, adding the polyester polyol (-OH: 1mol), and performing a reaction for 1-4 h at the temperature of 65-85 DEG C to obtain polyurethane acrylate (PUA); and 3, adding the reactive diluent to obtain the PUA resin. The method provided by the invention adopts the aromatic polyester polyol to improve the number of double bonds and structural rigidity of the PUA resin, so that the PUA resin can be rapidly cured and has high strength and high modulus; and the resin can be cured by ultraviolet light and heat, and has broad application prospects in the fields of composite material resin matrix, coatings, adhesives and structural adhesives.

Description

technical field [0001] The invention relates to the field of materials, in particular to a polyurethane acrylate resin that can be cured by ultraviolet light and has both high strength and high modulus and a preparation method thereof. Background technique [0002] Resin matrix composites are gradually being widely used due to their many advantages. At present, there are many composite material preparation processes, but the curing method is relatively simple. The common thermal curing method has low production efficiency and high energy consumption. Ultraviolet (UV) curing technology has the characteristics of high efficiency, energy saving, and environmental protection, and is gradually being valued and applied. [0003] Liu Dandan (see Liu Dandan, Wang Xin, Liu Tian, ​​et al. Preparation of photocurable resin for rapid prototyping[J]. Engineering Plastics Application, 2014,42(4):23-26.) prepared prepolymerized resins of different photocurable resins. Among them, the epo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/67C08G18/42C08G18/10
CPCC08G18/10C08G18/672C08G18/755C08G18/4211
Inventor 段华军董文静王钧杨小利
Owner WUHAN UNIV OF TECH
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