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Single-component thermocurable water-borne epoxy resin

A water-based epoxy resin and epoxy resin technology, used in epoxy resin coatings, coatings, fire-resistant coatings, etc., can solve the problems of poor chemical solvent resistance, poor salt spray resistance of paint film, and strong odor, and achieve good resistance. Effects of impact and physico-mechanical properties, excellent chemical resistance

Inactive Publication Date: 2021-02-09
HUNAN TUOCHUANG POLYMERIC NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based one-component epoxy baking paint, the use of water-based acrylic epoxy ester has disadvantages such as poor salt spray resistance, poor chemical resistance, poor chemical solvent resistance, and strong odor.

Method used

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  • Single-component thermocurable water-borne epoxy resin
  • Single-component thermocurable water-borne epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: the following is a kind of embodiment of the preparation method of single-component heat-curable water-based epoxy resin of the present invention, and described method comprises the following steps:

[0022] (1) Put 134g of trimethylolpropane into the reactor, heat and stir to dissolve evenly, then put 1.4g of boron trifluoride ether into the reactor, the reaction temperature is 100°C, and keep warm for 3 hours;

[0023] (2) after above-mentioned reaction finishes, add the bisphenol A epoxy resin of 1850g epoxy value 0.51 and 185g self-made terminal epoxy emulsifier, heat and stir to dissolve evenly;

[0024] (3) Add 1920g of deionized water to the reactant obtained in step (2), and obtain the product under the action of relatively high shear force.

[0025] The color of the one-component heat-curable water-based epoxy resin dispersion prepared in this example is milky white, the fineness is 0.30 μm, and the epoxy equivalent is 410.

Embodiment 2

[0026] Embodiment 2: the following is a kind of embodiment of the preparation method of one-component heat-curable water-based epoxy resin of the present invention, and described method comprises the following steps:

[0027] (1) Put 134g of trimethylolpropane into the reactor, heat and stir to dissolve evenly, then put 1.4g of boron trifluoride ether into the reactor, the reaction temperature is 110°C, and keep warm for 3 hours;

[0028] (2) After the above-mentioned reaction finishes, add the bisphenol A epoxy resin of 2275g epoxy value 0.44 and 230g self-made terminal epoxy emulsifier, heat and stir to dissolve evenly;

[0029] (3) Add 2340g deionized water to the reactant obtained in step (2), and obtain the product under the action of higher shear force.

[0030] The color of the one-component heat-curable water-based epoxy resin dispersion prepared in this example is milky white, the fineness is 0.32 μm, and the epoxy equivalent is 495.

Embodiment 3

[0031] Embodiment 3: the following is a kind of embodiment of the preparation method of one-component heat-curable water-based epoxy resin of the present invention, and described method comprises the following steps:

[0032] (1) Put 134g of trimethylolpropane into the reactor, heat and stir to dissolve evenly, then put 1.4g of boron trifluoride diethyl ether into the reactor, the reaction temperature is 105°C, and keep warm for 3 hours;

[0033] (2) after above-mentioned reaction finishes, add the bisphenol A epoxy resin of 4800g epoxy value 0.2 and 560g self-made terminal epoxy emulsifier, heat and stir to dissolve evenly;

[0034] (3) Add 4872g of deionized water to the reactant obtained in step (2), and obtain the product under the action of relatively high shear force.

[0035] The color of the one-component heat-curable water-based epoxy resin dispersion prepared in this example is milky white, the fineness is 0.45 μm, and the epoxy equivalent is 1100.

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Abstract

The invention belongs to the technical field of epoxy resin coatings, and particularly relates to single-component thermocurable water-borne epoxy resin and a preparation method thereof. The structureof the single-component thermocurable water-borne epoxy resin contains heterocycles, benzene rings and epoxy groups. During specific preparation, an alcohol is put into a reaction kettle, heating isconducted for even dissolution, then a catalyst is added into the kettle for reaction, a product obtained by the reaction, an epoxy-containing emulsifier and epoxy resin are added into an emulsifyingkettle, heating is conducted for uniform dispersion, deionized water is dropwise added into the emulsifying kettle, and a product is obtained under the action of relatively high shearing force. The single-component thermocurable water-borne epoxy resin obtained by the invention has the characteristics of wide pigment and filler intermiscibility, difficulty in volatilization, no solvent release, difficulty in combustion during transportation and processing, good chemical resistance, difficulty in combustion, good impact resistance, good chemical and mechanical properties, good adhesive force and the like.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin coatings, and in particular relates to a single-component heat-curable water-based epoxy resin. Background technique [0002] At present, one-component epoxy baking varnish and composite fiber impregnating resin are the main solvent-based products. One-component epoxy baking varnish and composite fiber impregnated resin, a large amount of solvent is added to the product, VOC emission is very high, polluting the environment; there are fire hazards in the process of transportation and use; a large amount of powder curing agent is used in each product, and the product has Severe curing agent sinking phenomenon, affecting the quality. [0003] In the era of "oil-to-water" coatings, functional water-based resins have also been gradually developed. Water-based one-component epoxy baking varnish, currently basically adopts water-based epoxy acrylic ester. Water-based one-component epoxy baking pai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D163/04C09D7/20C09D5/18C09D7/63C09D7/65C08G59/62
CPCC08G59/62C08L2201/02C09D5/18C09D163/00C09D163/04C09D7/20C09D7/63C09D7/65C08K5/053C08L71/00
Inventor 雷冠军
Owner HUNAN TUOCHUANG POLYMERIC NEW MATERIAL CO LTD