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Method for preparing air drying epoxy vinyl ester resin

A technology of epoxy vinyl ester and epoxy resin, which is applied in the field of high molecular polymers, can solve the problems of high reaction temperature and high cost of raw materials, and achieve the effects of high adhesion of paint film, good product stability and fast curing speed

Active Publication Date: 2009-04-01
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, this synthetic method also has the disadvantages that the cost of raw materials is relatively high and the reaction temperature is relatively high.

Method used

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  • Method for preparing air drying epoxy vinyl ester resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 196g of E51 bisphenol A epoxy resin, 70g of methacrylic acid, 23.5g of fumaric acid, 1g of benzyldimethylamine, and hydroquinone into a 500ml reactor with a thermometer, agitator, nitrogen inlet pipe and condenser 0.10g, start stirring, gradually raise the temperature, and control the reaction at 110°C for 4 hours. 28 g of dicyclopentadiene was slowly added dropwise to the reaction system, and the temperature was controlled at 110° C. for 3 hours until the acid value dropped below 20 mgKOH / g. Cool the reaction product below 110°C and add 180g of styrene, mix well, cool down to 60°C and discharge, filter to obtain a light yellow viscous liquid.

Embodiment 2

[0030] Put 392g of E51 bisphenol A epoxy resin, 160g of methacrylic acid, 24g of fumaric acid, 3g of benzyldiethylamine, and methylterephthalene into a 1000ml reactor equipped with a thermometer, stirrer, nitrogen inlet pipe and condenser. 0.24g of phenol, start stirring, gradually increase the temperature, and control the reaction at 90°C for 6 hours. 30 g of dicyclopentadiene was slowly added dropwise to the reaction system, and the temperature was controlled at 130° C. to react for 1 hour until the acid value dropped below 20 mgKOH / g. Cool the reaction product below 110°C and add 395g of styrene, mix well, cool down to 60°C and discharge, filter to obtain a light yellow viscous liquid.

Embodiment 3

[0032] 196g of E51 bisphenol A epoxy resin, 60g of methacrylic acid, 37.5g of fumaric acid, 2g of benzyltriethylammonium chloride, 4 - 0.12 g of tert-butylcatechol, start stirring, gradually raise the temperature, and control the reaction at 130° C. for 2 hours. 48 g of dicyclopentadiene was slowly added dropwise to the reaction system, and the temperature was controlled at 110° C. to react for 3 hours until the acid value dropped below 20 mgKOH / g. Cool the reaction product below 110°C and add 180g of styrene, mix well, cool down to 60°C and discharge, filter to obtain a light yellow viscous liquid.

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Abstract

The invention relates to a preparation method for air-drying epoxy vinyl ester resin. The preparation method is as follows: bisphenol A epoxide resin, acrylic acid or methacrylic acid and boletic acid are reacted; and then the generated epoxy vinyl ester resin is modified with dicyclopentadiene; the dicyclopentadiene is added in the reaction system and reacts for 1 hour to 3 hours at the temperature of 110 DEG C to 130 DEG C till the acid value falls below 20 mg KOH / g and the reaction products are cooled below 110 DEG C; styrene is added into the products for dilution and well blended. Compared with the prior art, the invention has the advantages that the epoxy vinyl ester resin has good air-drying property; for the coating with the thickness of 0.1 mm, the surface drying time is less than and equal to 0.5 hour and the hard drying time is more than and equal to 4 hours; the surface hardness can reach 3 H; the modified raw material formulation of the dicyclopentadiene has low cost; the preparation method is simple, environmentally friendly and does not generate waster water, waste gas and industrial residue; the products have good stability, good performances of normal temperature cure, rapid curing rate, high paint film adhesion, low shrinkage factor and good corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of high molecular polymers, and in particular relates to a preparation method of air-drying epoxy vinyl ester resin. Background technique [0002] Epoxy vinyl ester resin has both the excellent corrosion resistance and mechanical properties of epoxy resin, and the convenient processing performance of unsaturated polyester resin. At present, it has become the main matrix material of corrosion-resistant FRP products. It has a wide range of applications. Wide, throughout the chemical industry, metallurgy, construction and other anti-corrosion fields. [0003] Epoxy vinyl ester resin contains vinyl groups at both ends of the molecule, and the middle skeleton is epoxy resin, which belongs to a type of unsaturated polyester resin. The curing of the epoxy vinyl ester resin occurs through the free radicals generated by the initiator to activate the double bonds in the resin and the crosslinking agent to carry out a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14
CPCC08G59/1461C08G59/1494
Inventor 钱建华刘坐镇
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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