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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 formulation and synthesis process of air-drying epoxy vinyl ester resin, which can solve the problem of reducing adhesion, clarity and gloss, unsuitable for industrialized large-scale production, resin Complicated production and other issues, to achieve the effect of good chemical resistance, high hardness, and high fullness

Active Publication Date: 2009-07-08
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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  • Technique for synthesizing air-dry type oxirene ester resin

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, and finally cool to room temperature, filter to obtain shallow 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, when the temperature drops below 60°C, add 0.25g of N-(1,3-dimethyl)butyl-N'-phenyl-p-phenyl Diamine, fully stirred, finally cooled to room temperature, filtered to obtain light yellow turbid viscous liquid.

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Abstract

The invention relates to a synthesis process of air-drying epoxy vinyl ester resin, which consists of bisphenol A type epoxy resin with low epoxy equivalent and high epoxy equivalent, and organic monobasic unsaturated carboxylic acid with a catalyst at 120-160 ° C. React in the presence of a polymerization inhibitor, and then be diluted with a cross-linkable monomer to synthesize. The resin has good air-drying property, surface dry ≤ 0.5 hours, solid dry ≤ 4 hours, moderate viscosity, good wettability with glass fiber and glass felt, excellent physical and mechanical properties, excellent chemical corrosion resistance, suitable for such as hand lay-up, winding, stretching Extrusion, injection and other FRP molding processes. In the synthesis process of the invention, the production process is simplified, the production energy consumption is reduced, and the product has good stability.

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 Patents(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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