Synthesizing method for tough epoxy vinyl ester resin

A technology of epoxy vinyl ester and synthesis method, which is applied in the field of synthesis of tough epoxy vinyl ester resin, can solve the problems affecting the stability of the final product, the arrangement of the molecular main chain is irregular, and the molecular weight distribution is uneven, so as to achieve the reaction The effect of clear end point control, good resin reproducibility, and excellent mechanical properties

Inactive Publication Date: 2012-07-04
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the shortcoming that this synthetic method exists is: the one, while epoxy resin and monobasic unsaturated carboxylic acid ring-opening esterification reaction, produce competitive ester with the carboxyl group of organic unsaturated dibasic acid and the carboxyl group of carboxyl-terminated nitrile rubber chemical reaction, the main molecular chain of epoxy vinyl ester is arranged irregularly, and the molecular weight distribution is uneven, which affects the stability of the final product; the second is that the nitrile rubber that does not participate in the reaction is modified due to the use of nitrile rubber during the reaction. Phase separation with the generated modified epoxy vinyl ester main chain is easy to cause delamination, and the high molecular epoxy vinyl ester main chain modified with nitrile rubber has poor miscibility with crosslinkable monomers, especially styrene. Crystallization and stratification occur, affecting use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 454g of E44 epoxy resin, 163.4g of methacrylic acid, 20.2g of sebacic acid, 2g of tetraethylammonium chloride, and 0.2g of hydroquinone to the reaction kettle in turn, and gradually heat up; control the temperature of the reactant at 100-130 React at ℃, measure the acid value every hour, until the acid value drops below 10mgKOH / g as the end point of the reaction; cool the reaction product to about 100℃, add 240g styrene, control the temperature at 60-80℃ and stir evenly to obtain a tough ring Oxyethylene ester resins.

Embodiment 2

[0028] Add 380g E51 bisphenol A type epoxy resin, 122.2g acrylic acid, 29.2g adipic acid, 2g benzyltriethylammonium chloride, 0.2g methylhydroquinone successively in the reaction kettle, gradually heat up; control the reaction React at a temperature of 100-130°C, and measure the acid value every hour until the acid value drops below 10mgKOH / g as the end point of the reaction; cool the reaction product to about 100°C and add 200g of styrene, 40g of divinylbenzene, Control the temperature at 60-80°C and stir evenly to obtain tough epoxy vinyl ester resin.

Embodiment 3

[0030] Add 380g E51 bisphenol A epoxy resin, 129g methacrylic acid, 52.2g suberic acid, 2g catalyst benzyl trimethyl ammonium bromide, 0.2g 2,5-di-tert-butyl p-phenylene Diphenol, gradually increase the temperature; control the temperature of the reactant to react at 100-130°C, measure the acid value every hour until the acid value drops below 10mgKOH / g as the end point of the reaction; cool the reaction product to about 100°C and add 200g of benzene Ethylene, 40g of methyl methacrylate, controlled temperature of 60-80°C and stirring evenly to obtain tough epoxy vinyl ester resin.

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Abstract

The invention belongs to the technical field of high-molecular polymers, and relates to a synthesizing method for tough epoxy vinyl ester resin. The synthesizing method is characterized by comprising the following steps of: (1) adding 45-50 percent by weight of bisphenol type A epoxy resin, 8.2-20.3 percent by weight of unsaturated monocarboxylic acid, 2.5-11.1 percent by weight of long chain saturated dibasic acid and a small amount of catalyst and polymerization inhibitor into a reaction kettle in sequence; (2) controlling the temperature between 100 DEG C and 130 DEG C, and measuring the acid value once every hour till the acid value is lowered below 10 mgKOH / g; and (3) cooling to about 100 DEG C, adding 26-40 percent of a crosslinking agent, and uniformly stirring at the temperature of 60-80 DEG C to obtain the tough epoxy vinyl ester resin. The synthesizing method has the advantages that: unsaturated monocarboxylic acid is replaced by a long chain saturated dibasic acid part for reacting, so that the synthesizing method is simple, a destination is specified, side reactions are reduced, 'three wastes' are not produced, the quality is stable, and a product is particularly suitable for manufacturing high-speed railway elastic gaskets, large-sized wind-driven generator blades, high-speed boats, high-pressure gas cylinders and the like.

Description

technical field [0001] The invention belongs to the technical field of high molecular polymers, and relates to a method for synthesizing tough epoxy vinyl ester resin. Background technique [0002] Epoxy vinyl ester resins are the addition reaction product of an epoxy resin with an ethylenically unsaturated monobasic acid, diluted with a reactive monomer. Epoxy vinyl ester resin has good corrosion resistance, and has excellent mechanical properties of epoxy resin and excellent characteristics of unsaturated polyester resin curing at room temperature. Resin-based composite materials made of epoxy vinyl ester resin have been widely used in chemical anticorrosion, flue gas desulfurization, transportation, electronic appliances, etc. However, compared with epoxy resin, the toughness of epoxy vinyl ester resin cured product is poor, which cannot meet the requirements of high-speed railways, fan blades, sports equipment, high-speed boats, high-pressure gas cylinders and other fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08G59/42C08G59/17
Inventor 钱建华刘坐镇黄锐
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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