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Styrene-free epoxy vinyl ester resin synthesis process

A technology for synthesizing epoxy vinyl esters and resins, applied in the field of polymer materials, can solve the problems of difficult reaction control, high reaction temperature, side reactions, etc., and achieve the effects of uniform reaction, lower reaction temperature, and prolonged reaction time.

Active Publication Date: 2018-04-03
HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent articles on the synthesis process of epoxy vinyl ester resins all mention that the reaction temperature is relatively high, generally higher than 100°C, such as "CN201610079032.4 A vinyl ester resin and its preparation method", mentioned in claim 2 "The reaction temperature is preferably 120-160°C, and the time is 0.5-4 hours." Claim 7 mentions that "the reaction temperature is preferably 100-140°C, and the time is 1-6 hours." At such a high temperature, the reaction is difficult to control. Very prone to side effects

Method used

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  • Styrene-free epoxy vinyl ester resin synthesis process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] After dissolving 0.60 g of catalyst aluminum chloride with ethanol, add it to 105 g of hydroxyethyl methacrylate, stir evenly, and set aside. 450g of bisphenol A epoxy resin E51, 4.0g of catalyst trimethylamine, and 0.15g of tert-butylhydroquinone were put into the reactor. In the case of nitrogen gas, gradually raise the temperature to 80°C, keep the temperature and stir, add dropwise the hydroxyethyl methacrylate dissolved in the catalyst, after 0.5 hours, add 60g of methacrylic acid, fully stir, and gradually raise the temperature to 90°C React for 1.5 hours, and the acid value is less than 10 mgKOH / g; cool down to below 60°C and add 360 g of trimethylolpropane triacrylate, and finally cool to room temperature, filter to obtain a light yellow viscous liquid.

Embodiment 2

[0041] Dissolve 1.0 g of catalyst ferric chloride in methanol, add it to 95 g of hydroxypropyl acrylate, stir evenly, and set aside. In the reactor, drop into 360g bisphenol A type epoxy resin E44, catalyst pyridine 15g, tert-butyl catechol 0.20g. In the case of nitrogen gas, gradually raise the temperature to 50°C, keep the temperature and stir, add dropwise the hydroxypropyl acrylate dissolved in the catalyst, and drop it in 0.5 hours, then add 70g of acrylic acid, stir well, gradually raise the temperature to 80°C and react for 1.5 hours, The acid value is less than 10mgKOH / g; cool down to below 60°C and add 400g of tripropylene glycol diacrylate, and finally cool to room temperature and filter to obtain a light yellow viscous liquid.

Embodiment 3

[0043] Dissolve 0.7 g of catalyst aluminum chloride in methanol, add it to 100 g of hydroxyethyl acrylate, stir evenly, and set aside. 400g of bisphenol A type epoxy resin E51, 10g of catalyst methyl sulfide, and 0.30g of hydroquinone were put into the reactor. In the case of nitrogen gas, gradually raise the temperature to 60°C, keep the temperature and stir, add dropwise the hydroxyethyl acrylate dissolved in the catalyst, and drop it in 0.5 hours, then add 65g of fumaric acid, stir well, and gradually raise the temperature to 70°C React for 1.5 hours, and the acid value is less than 10mgKOH / g; cool down to below 60°C and add 450g of neopentyl glycol diacrylate, and finally cool to room temperature, and filter to obtain a light yellow viscous liquid.

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Abstract

The invention relates to a styrene-free epoxy vinyl ester resin synthesis process, aims to solve the technical problem of providing a process which is safe and environmentally friendly, low in reaction temperature, short in reaction time and easy in reaction process control, and belongs to the field of high polymer materials. The process is characterized in that an acrylate monomer with low odor,a high flashing point and a high melting point, instead of a styrene volatile cross-linked monomer, is adopted for dilution, so that the process is environmentally friendly and is free of styrene emission. The process comprises the following steps: dissolving a catalyst #1 into hydroxyl acrylate, putting a catalyst #2 into an epoxy resin, and enabling the catalysts and the hydroxyl acrylate to berelatively uniformly reacted by using a dropping method, wherein heat radiation is easy to control, and the reaction temperature is 50-100 DEG C. As the hydroxyl acrylate and organic unsaturated acidsare adopted to form a resin main chain, so that the resin has relatively high reaction activity after being cross-linked with an acrylate monomer, a rapid resin curing speed is achieved, and the resin is excellent in comprehensive property.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a synthesis process of styrene-free epoxy vinyl ester resin. Background technique [0002] Epoxy vinyl ester resin refers to unsaturated acid and epoxy resin as the main raw materials, under the action of catalyst and other additives, the molecular terminal or side group obtained by heating reaction contains unsaturated double bond resin, industrially Epoxy vinyl esters are usually dissolved in cross-linking monomers such as styrene to make liquid resins. [0003] Since epoxy vinyl ester resins usually use styrene as a diluent and participate in film formation as a crosslinking monomer. Before the resin is cured, styrene is continuously volatilized from the resin and emitted into the construction environment. After the resin is cured, styrene residues still exist, which is also an important factor affecting the performance of the product. This not only causes the los...

Claims

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Application Information

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IPC IPC(8): C08G59/17
CPCC08G59/1466
Inventor 茆凌峰黄玲沈浩洗昌杰刘世强程传才
Owner HUACHANG POLYMER EAST CHINA UNIV OFSCI & TECH
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