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Fluorine-containing epoxy acrylate prepolymer for UV coating and preparation method thereof

A technology of epoxy acrylate and prepolymer, which is applied in the field of coatings, can solve the problems of further improvement of tensile strength, and achieve the effects of eliminating phase separation, improving related performance, and reducing viscosity

Inactive Publication Date: 2016-03-30
YELLOW RIVER CONSERVANCY TECHN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the mechanical and thermal properties of EFBDPA and commercial EA cured coatings found that the viscosity, coating adhesion, hardness and other performance indicators of modified EA were better than those of unmodified EA, and the tensile strength was 86% higher than that of pure EA. % (see literature Yao Xinding. Preparation of UV-curable prepolymer and research on its cured coating properties [D]. Zhengzhou University, 2011); but the viscosity of EFBDPA prepolymer is still high, and the tensile strength needs to be further improved

Method used

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  • Fluorine-containing epoxy acrylate prepolymer for UV coating and preparation method thereof
  • Fluorine-containing epoxy acrylate prepolymer for UV coating and preparation method thereof
  • Fluorine-containing epoxy acrylate prepolymer for UV coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 5mmol (2.26g) of epoxy resin (E44) in 10g of ethylene glycol monomethyl ether, and add 1.4 The mixed solution of 4-bromo-3,5-difluorophenylmethacrylamide and 10g ethylene glycol monomethyl ether was then heated to 90°C and reacted for 2h, and the ethylene glycol monomethyl ether was distilled off under reduced pressure, and the obtained The product was extracted and washed with ethanol (50ml×2), and the ethanol layer was distilled off under reduced pressure to remove ethanol;

[0034] Get 50g of the previous step product, 5g of triethylamine, and 0.5g of hydroquinone into a four-necked flask, pass N 2 , slowly drop 0.36g of acrylic acid (2h dropwise), heat up to 60 ° C for a period of time, measure the acid value of the reactant, when the acid value is less than 8mgKOH / g, it is the end point;

[0035] With 10wt% Na 2 CO 3 The aqueous solution was washed 4 times, then dissolved in ether, and then washed with anhydrous Na 2 SO 4 Dry and evaporate ether to ob...

Embodiment 2

[0042] Dissolve 5mmol (2.26g) of epoxy resin (E44) in 10g of ethylene glycol monomethyl ether, and add dropwise A mixed solution of 2.8g of 3,5-difluorophenyl methacrylamide and 10g of ethylene glycol monomethyl ether, then heated up to 60°C, reacted for 4h, removed ethylene glycol monomethyl ether by distillation under reduced pressure, and used the obtained product Ethanol (50ml×2) was extracted and washed, and the ethanol layer was distilled off under reduced pressure to remove ethanol;

[0043] Take 50g of the product from the previous step, 4g of sodium hydroxide, and 0.4g of p-hydroxyanisole into a four-necked flask, blow nitrogen, slowly add 0.72g of acrylic acid dropwise (2.5h to complete the drop), and raise the temperature to 70°C for a period of time. Measure the acid value of the reactant, when the acid value is less than 8mgKOH / g, it is the end point;

[0044] With 10wt% Na 2 CO 3 The aqueous solution was washed 5 times, then dissolved in ether, and then washed...

Embodiment 3

[0047] Dissolve 5mmol (2.26g) of epoxy resin (E51) in 10g of ethylene glycol monomethyl ether, and add dropwise A mixed solution of 4.2g 1,3,5-difluorophenylmethacrylamide and 10g ethylene glycol monomethyl ether, then heated up to 80°C, reacted for 3h, removed ethylene glycol monomethyl ether by distillation under reduced pressure, and obtained The product was extracted and washed with ethanol (50ml×2), and the ethanol was removed by distillation under reduced pressure;

[0048] Take 50g of the product from the previous step, 2g of sodium bicarbonate, and 0.9g of p-hydroxyanisole into a four-necked flask, pass nitrogen gas, slowly add 1.8g of acrylic acid dropwise (the dropwise addition is completed in 3 hours), raise the temperature to 80°C for a period of time, and measure The acid value of the reactant, when the acid value is less than 8mgKOH / g, is the end point;

[0049] With 10wt% Na 2 CO 3 The aqueous solution was washed 5 times, then dissolved in ether, and then was...

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Abstract

The invention relates to the technical field of coatings, in particular to a fluorine-containing epoxy acrylate prepolymer for UV coatings and a preparation method thereof. The prepolymer is an epoxy acrylate prepolymer main chain that introduces fluorine-containing methacrylamide structural units through radical polymerization. The introduction of the methyl group in the invention improves the degree of branching of the resin, increases the degree of crosslinking of the cured coating, increases the tensile strength, and effectively improves the related properties of the cured coating.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a fluorine-containing epoxy acrylate prepolymer for UV coatings and a preparation method thereof. Background technique [0002] Ultraviolet light (Ulvartiolet, UV) curing coating refers to a new type of coating that can be quickly cross-linked and cured to form a film under UV radiation. Because this type of coating is cured by ultraviolet light irradiation, it has unparalleled advantages. First of all, UV curing speed is fast and production efficiency is high, which is especially suitable for assembly line production; secondly, UV curing substrates have low energy consumption, room temperature curing, and high chemical stability, especially suitable for heat-sensitive substrates; finally, UV curing The photocuring system does not contain or only contains a small amount of organic solvents, and the environmental pollution is small. In short, UV-curable coatings have become a re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/10C08F8/10C09D163/10
Inventor 姚新鼎刘国际方瑞娜庞宏建王宗舞崔鹏陈西良陈志冉
Owner YELLOW RIVER CONSERVANCY TECHN INST
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