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Method for preparing self-emulsifying aqueous epoxy resin curing agent

A water-based epoxy resin and epoxy resin technology, used in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of unsatisfactory comprehensive performance of curing agents, and achieve the effect of improving the performance of cured products

Active Publication Date: 2010-02-17
湖北山虎涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that a single end-capping agent is used for end-capping, but the overall performance of the obtained curing agent is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] in N 2 Add 164.5g TETA and 100g PM (propylene glycol methyl ether) solvent in the four-neck flask of protection, thermometer, condensing tube, magnetic sub-stirring, water bath slowly heats. At 60°C, use a dropping funnel equipped with 200g of epoxy resin CYD128 and 150g of PM solvent to add the solution dropwise to the four-neck bottle, control the drop for 1h, and react at 65°C for 3.5h.

[0019] Add a mixed solution containing 74.36g of butyl glycidyl ether and 85.8g of phenyl glycidyl ether dropwise to the four-neck flask, control the drop to finish within 0.5h, control the temperature at 70°C, and react for 2h. After the reaction, cool down to 50°C, add 49.4g of pure acetic acid to react for 0.5h, distill the product under reduced pressure to remove the solvent, add 250g of water to dilute to a solid content of 70% (mass, the same below) for later use.

[0020] Use of this curing agent: put 97g of epoxy resin CYD128 and 100g of the above curing agent in a containe...

Embodiment 2

[0022] in N 2 Add 132g TETA and 80g PM solvent in the four-neck flask with protection, thermometer, condenser, and magnetic sub-stirring, and slowly heat in a water bath. At 60°C, use a dropping funnel equipped with 160g of epoxy resin CYD128 and 120g of PM solvent to add the solution dropwise to the four-neck bottle, control the drop for 1h, and control the temperature at 70°C for 3h.

[0023] Add the mixed solution of 47.6g butyl glycidyl ether and 82.4g phenyl glycidyl ether dropwise to the four-neck flask, control the drop to finish within 0.5h, control the temperature at 70°C, and react for 2h. After the reaction, the temperature was lowered to 50°C, 36.8g of pure acetic acid was added to react for 0.5h, the product was distilled off the solvent under reduced pressure, and diluted with 200g of water until the solid content was 70% for later use.

[0024] The use of this curing agent: put 65.6g of epoxy resin CYD128 and 80g of the above curing agent in a container, emulsi...

Embodiment 3

[0026] in N 2 Add 132g TETA and 80g PM solvent in the four-neck flask with protection, thermometer, condenser, and magnetic sub-stirring, and slowly heat in a water bath. At 60°C, use a dropping funnel equipped with 160g of epoxy resin CYD128 and 120g of PM solvent to add the solution dropwise to the four-neck bottle, control the drop for 1h, and control the temperature at 70°C for 3h.

[0027] Add a mixed solution containing 71.384g of butyl glycidyl ether and 54.912g of phenyl glycidyl ether dropwise into a four-neck flask, control the drop to finish within 0.5h, and control the temperature at 70°C for 2h of reaction. After the reaction, cool down to 50°C, add 36.8g of pure acetic acid to react for 0.5h, distill the product under reduced pressure to remove the solvent, add 160g of water to dilute to a solid content of 70% for later use.

[0028] The use of this curing agent: put 66g of epoxy resin CYD128 and 80g of the above curing agent in a container, emulsify and stir at...

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Abstract

The invention relates to a method for preparing a self-emulsifying aqueous epoxy resin curing agent. The method comprises the following steps: taking triethylene tetramine and liquid-state epoxy resinCYD128 as raw materials and obtaining an epoxy resin CYD128-TETA addition compound by a synthetic reaction, wherein the mole ratio of the materials of the triethylene tetramine and the epoxy resin CYD128 is (1-2.2):1; then, dripping a mixed end sealing agent to the epoxy resin CYD128-TETA addition compound, neutralizing the secondary amine hydrogen salification of a generated product after end sealing by organic acid, and finally, diluting with water so as to obtain the self-emulsifying aqueous epoxy resin curing agent, wherein the chemical metering ratio of epoxy radicals in the mixed end sealing agent and primary amine hydrogen in the epoxy resin CYD128-TETA addition compound is 1:1. The invention adopts the common end sealing agent to carry out mixed end sealing, thereby enhancing theproperty of a condensate greatly, meeting the performance requirement of aqueous epoxy land lawn paint, and being widely applied to aqueous epoxy land lawns, steel product preservatives and woodenwarelacquer.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a preparation method of a self-emulsifying water-based epoxy resin curing agent. Background technique [0002] Epoxy resins have excellent process performance, mechanical properties and physical properties, and can be used as coatings, adhesives, composite resin substrates, electronic packaging materials, etc., and are widely used in mechanical electronics, aerospace, transportation, construction and other fields. Most commonly used epoxy resins are viscous liquid or solid, insoluble in water, soluble in aromatic hydrocarbons, ketones and other organic solvents. However, organic solvents are volatile, flammable, explosive, and toxic. With the increasingly urgent and strict requirements for environmental protection, the application of epoxy resins has been greatly restricted. Therefore, water-based epoxy resins have emerged as the times require. [0003] The curing agen...

Claims

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Application Information

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IPC IPC(8): C08G59/50C09D163/00C09D5/08
Inventor 张良均胡锋
Owner 湖北山虎涂料有限公司
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