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Technique for synthesizing air-dry type oxirene ester resin

A technology of epoxy vinyl ester and resin synthesis process, which is applied in the field of formula and synthesis process of air-drying epoxy vinyl ester resin, and can solve the problems of unsuitable for industrialized mass production, reduced adhesion, clarity, gloss, and resin Complicated production and other problems, to achieve the effect of good chemical resistance, good wear resistance and high fullness

Active Publication Date: 2007-07-25
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of paraffin will not only reduce the adhesion, clarity, gloss and other properties, but also need grinding and polishing, which is very inconvenient and the effect is not ideal
[0006] b. Use polyol allyl ether and cellulose acetate butyrate to modify the resin. The half-esterification method and end-capping method modification are not suitable for use in the synthesis of vinyl ester resins. The initial method modification will make allyl The base ether and other dibasic alcohols and dibasic acids are put into the reactor at the same time, and the esterification reaction is carried out at 185°C to the required acid value, but a large amount of polymerization inhibitor must be added during the esterification process to prevent the product from being released in the reactor Gelling, which complicates resin production
[0007] c. Another method is to put curing in an inert gas such as nitrogen, but it is expensive and not suitable for industrial mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the reactor, 170g of low epoxy equivalent bisphenol A epoxy resin (epoxy equivalent is 179~192g / mol) and high epoxy equivalent bisphenol A epoxy resin (epoxy equivalent is 455~500g / mol) mol) 170 g, 110 g of methacrylic acid, 0.8 g of benzyldimethylamine, and 0.15 g of tert-butylhydroquinone. In the case of nitrogen gas, gradually raise the temperature to 120°C, and keep the temperature until the measured acid value is less than 30mgKOH / g; cool down to below 110°C, add 260g of styrene, 20g of methyl methacrylate, stir well, when the temperature drops to 60°C Next, add 0.1 g of N-cyclohexyl-N'-phenyl-p-phenylenediamine, stir thoroughly, and finally cool to room temperature, and filter to obtain a light yellow viscous liquid.

Embodiment 2

[0029] 150g of bisphenol A type epoxy resin (epoxy equivalent is 185~196g / mol) of low epoxy equivalent, 200g of bisphenol A type epoxy resin of high epoxy equivalent (epoxy equivalent is 455~556g / mol) , 85g of acrylic acid, 0.38g of benzyltrimethylammonium chloride, and 0.08g of tert-butylcatechol are put into the device shown in Example 1, and the temperature is gradually raised to 130°C under the condition of feeding nitrogen gas, and the temperature is maintained until the acid is detected. The value is less than 30 mgKOH / g. Cool down to below 110°C, add 300g of styrene, stir well, when the temperature drops below 60°C, add 0.30g of N-isopropyl N'-phenyl-p-phenylenediamine, stir well, finally cool to room temperature, filter to get light yellow Viscous liquid.

Embodiment 3

[0031] 175g of bisphenol A type epoxy resin (epoxy equivalent is 185~208g / mol) of low epoxy equivalent, 230g of bisphenol A type epoxy resin of high epoxy equivalent (epoxy equivalent is 714~833g / mol) , 85g of acrylic acid, 1.6g of benzyltriethylammonium chloride, and 0.20g of p-benzoquinone are dropped into the device shown in Example 1, and the temperature is gradually raised to 140°C under nitrogen gas conditions, and the temperature is maintained until the acid value is less than 30mgKOH / g. Cool down to below 110°C, add 320g of styrene and 50g of divinylbenzene, stir well, add 0.25g of N-(1,3-dimethyl)butyl N'-phenyl-p-phenylenediamine when the temperature drops below 60°C , fully stirred, finally cooled to room temperature, and filtered to obtain a light yellow turbid viscous liquid.

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PUM

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Abstract

This invention relates to a process for synthesizing air-drying epoxy vinyl ester resin. The process comprises: reacting bisphenol A type epoxy resins with low and high epoxy equivalent, and organic unsaturated monocarboxylic acid at 120-160 deg.C in the presence of catalyst and polymerization inhibitor, and then diluting with crosslinkable monomer. The resin has good air-drying performance, with surface drying time less than or equal to 0.5 h, and inner drying time less than or equal to 4 h. Besides, the resin has appropriate viscosity, good wettability with glass fibers and glass mats, good physical and mechanical performance, and good chemical corrosion resistance, and is suitable for various molding processes of fiber reinforced plastics such as manual pasting, coiling, drawing and spraying. The method has such advantages as simple process, low energy consumption, and stable product quality.

Description

technical field [0001] The invention belongs to the technical field of high molecular polymers, and in particular relates to a formula and a synthesis process of an air-drying epoxy vinyl ester resin. Background technique [0002] Epoxy vinyl ester resins contain vinyl ester groups at both ends of the molecule, and the middle skeleton is epoxy resin, which are obtained by ring-opening esterification of unsaturated organic monocarboxylic acid and epoxy resin. Epoxy vinyl ester resin has become the main matrix material of corrosion-resistant FRP products due to its excellent corrosion resistance and mechanical properties of epoxy resin, and the convenient processing performance of unsaturated polyester resin. It has a wide range of applications. , throughout the chemical industry, metallurgy, construction and other sectors of the national economy in the field of anti-corrosion. [0003] At present, ordinary epoxy vinyl ester resins are obtained by ring-opening esterification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08K5/09
Inventor 茆凌峰刘坐镇杨萌周润培
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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