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Synthesis technique of alkide resin modified epoxy vinyl esters resin

A technology for synthesizing epoxy vinyl ester and resin, which is applied in the field of alkyd resin-modified epoxy vinyl ester resin synthesis process, and can solve the problem that impact strength, elongation at break, curing shrinkage, and bonding strength cannot meet the composite requirements. Materials, low bonding strength, and failure to meet requirements, etc., to achieve the effects of good product stability, enhanced toughness, and improved bonding strength

Inactive Publication Date: 2008-01-30
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the overall performance of epoxy vinyl ester resin is excellent, some aspects of performance, such as impact strength, elongation at break, cure shrinkage and bond strength, cannot meet the special requirements of some composite materials.
Epoxy vinyl ester resin obtained by ring-opening esterification of unsaturated organic monocarboxylic acid and epoxy resin, the elongation at break of the resin cast body is only 3-6%, and the impact strength is 5-8KJ / m 2 , the curing shrinkage rate is 2 to 3%, or even greater, and the bond strength of the resin to steel or concrete is small, which obviously cannot meet the requirements of high-performance matrix resin in the manufacturing process of composite materials at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the reactor, 340 g of bisphenol A epoxy resin (E-44), 62 g of methacrylic acid, 45 g of fumaric acid, 1.2 g of benzyl dimethylamine, and 0.10 g of hydroquinone were charged. The temperature was gradually increased to 130°C under the condition of nitrogen gas, the reaction system became uniform and transparent, and the temperature was maintained until the measured acid value was less than 30 mgKOH / g. Add 0.10g tert-butylcatechol and 310g styrene when the temperature is below 110℃, stir well, when the temperature drops below 60℃, add 0.10g copper naphthenate solution, alkyd resin (hydroxyl value 45mgKOH / g, acid The value is 8mgKOH / g) 25g, cobalt naphthenate solution 22g, and finally cooled to room temperature, filtered to obtain a purple-red transparent viscous liquid.

Embodiment 2

[0026] Put 340g of bisphenol A epoxy resin (E-51), 72g of crotonic acid, 85g of sebacic acid, 0.95g of benzyltrimethylammonium chloride, and 0.10g of methylhydroquinone into Example 1. In the device, the temperature was gradually raised to 120°C under the condition of nitrogen gas, the reaction system became uniform and transparent and the temperature was maintained until the measured acid value was less than 30mgKOH / g. Add 0.08g tert-butyl hydroquinone, 280g styrene, and 20g methyl methacrylate when the temperature drops below 110℃. Stir thoroughly. When the temperature drops below 60℃, add 0.09g copper naphthenate solution and alkyd resin. (Hydroxyl value is 70mgKOH / g, acid value is 7mgKOH / g) 30g, 8g cobalt isooctanoate solution, and finally cooled to room temperature, filtered to obtain a purple-red transparent viscous liquid.

Embodiment 3

[0028] Put 340g of bisphenol A epoxy resin (E-44), 60g of methacrylic acid, 65g of adipic acid, 1.4g of benzyltriethylammonium chloride, and 0.18g of tert-butyl hydroquinone into the Example 1 In the device shown, the temperature was gradually raised to 160°C while nitrogen was introduced, and the following operation steps were the same as in Example 1.

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Abstract

The invention relates to the technique to synthesize alkide resin modified epoxy vinyl resin. According to a certain compounding ratio, diphyenylol propane epoxy resin, organic monobasic unsaturated carboxylic acid, biatomic acid, catalyst agent and inhibitive substance are fed into a reactor to do ring cleavage esterification, then based on the existence of inhibitive substance, crosslinked monomer is added to deliquate and modified alkide resin and accelerating agent are added to accelerate in advance. The invention has the beneficial effects that: in ring cleavage esterification, the biatomic acid is employed as chain extender, and the alkide resin is added in the deliquating process (45 to 120 mg KOH / g hydroxyl value and 5 to 15 mgKOH / g acid value) to mix and modify, which largely strengths resin ductility, causes resin casting tension set is more than 8 percent, impact strength is above 20 KJ / m2; meanwhile largely reduces the resin solidification shrinkage ratio, improves the bonding strength, meets special compound material need as a result. The synthetic technique of the invention is simple, conformity with environmental protective and has good production stability without producing waste gas, waste water, and waste residue.

Description

Technical field [0001] The invention relates to a synthesis process of an alkyd resin modified epoxy vinyl ester resin. Background technique [0002] Epoxy vinyl ester resin contains vinyl ester groups at both ends of the molecule, and the middle skeleton is epoxy resin, which is obtained by ring-opening esterification reaction of unsaturated organic monocarboxylic acid and epoxy resin. Epoxy vinyl ester resin has both the excellent corrosion resistance and mechanical properties of epoxy resin and the convenient process performance of unsaturated polyester resin. It has become the main matrix material for corrosion-resistant glass fiber reinforced plastic products. It is widely used in the anti-corrosion fields of various sectors of the national economy such as chemical industry, metallurgy, and construction. [0003] Although the comprehensive performance of epoxy vinyl ester resin is excellent, certain aspects of performance, such as impact strength, elongation at break, curing...

Claims

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Application Information

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IPC IPC(8): C08G59/17
Inventor 茆凌峰周润培刘坐镇
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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