Technique for synthesizing resin of epoxy vinyl ester with low exothermal peak

A technology of epoxy vinyl ester and synthesis process, which is applied in the field of high molecular polymers, can solve problems such as easy cracking of products, and achieve the effects of good wettability, prevention of micro-cracks, and moderate viscosity

Active Publication Date: 2007-05-09
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when making thick parts, the products are easier to crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 340 g of bisphenol A type epoxy resin, 65 g of methacrylic acid, 0.8 g of benzyldimethylamine, and 0.15 g of resorcinol were put into the reactor with a high epoxy equivalent weight of 455-500 g / mol. The temperature was gradually raised to 130° C. under the condition of feeding nitrogen, and the temperature was maintained after the reaction system became uniform and transparent until the measured acid value was less than 30 mgKOH / g. Cool down to below 110°C and add 260g of styrene, stir well, when the temperature drops below 70°C, add 0.1g of 4-tert-butylphenol, stir well, finally cool to room temperature, filter to obtain light yellow viscous liquid.

Embodiment 2

[0026] Put 340g of bisphenol A type epoxy resin with high epoxy equivalent (epoxy equivalent is 455~556g / mol), 50g of acrylic acid, 0.38g of benzyltrimethylammonium chloride, and 0.07g of methylhydroquinone into Example 1 In the device shown, the temperature is gradually raised to 120° C. under the condition of feeding nitrogen gas, and the temperature is maintained after the reaction system becomes uniform and transparent until the measured acid value is less than 30 mgKOH / g. Cool down to below 110°C, add 160g of styrene and 80g of divinylbenzene, stir well, when the temperature drops below 70°C, add 0.30g of 2,4,6-tri-tert-butylphenol, stir well, finally cool to room temperature, and filter A light yellow viscous liquid was obtained.

Embodiment 3

[0028] 340g of bisphenol A type epoxy resin with high epoxy equivalent (epoxy equivalent is 714~833g / mol), 38g of methacrylic acid, 1.6g of benzyl triethyl ammonium chloride, 0.20 of tert-butylhydroquinone g is dropped into the device shown in Example 1, and the temperature is gradually raised to 160°C under the nitrogen gas situation, and the temperature is maintained after the reaction system becomes uniform and transparent until the acid value is less than 30mgKOH / g. Cool down to below 110°C, add 190g of styrene and 100g of methyl methacrylate, stir well, when the temperature drops below 70°C, add 0.15g of 2,6-di-tert-butyl-p-cresol, stir well, and finally cool to room temperature, Filter to obtain light yellow turbid viscous liquid.

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Abstract

This invention discloses a process for synthesizing epoxy vinyl ester resin with low exothermal peak. The process comprises: reacting bisphenol A type epoxy resin with epoxy equivalent of 455-1000 g/mol, and unsaturated organic monocarboxylic acid at 120-160 deg.C in the presence of catalyst and polymerization inhibitor, and then diluting with crosslinkable monomer. The obtained epoxy vinyl ester resin has low exothermal peak (90-120 deg.C), low shrinkage, high toughness, and moderate viscosity, good wetting performance with glass fibers and glass textiles, and high chemical corrosion resistance. The epoxy vinyl ester resin can be used in molding process of fiber-reinforced plastics by pasting, winding, stretching or injecting.

Description

technical field [0001] The invention belongs to the technical field of high molecular polymers, and in particular relates to a synthesis process of epoxy vinyl ester resin with low exothermic peak. Background technique [0002] Epoxy vinyl ester resin molecules contain vinyl ester groups at both ends, 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, as well as the convenient process 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] The exothermic peak refers to the highest temperature that the resin-initiator mixture can reach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/16C08F283/10
Inventor 茆凌峰杨萌刘坐镇周润培
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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