Waterborne epoxy resin dispersion and preparation method thereof

A water-based epoxy resin and epoxy resin technology, used in epoxy resin coatings, coatings, etc., can solve the problems of slow drying speed, poor storage stability, poor adhesion, etc., and achieve increased crosslinking density and small particle size. , the effect of improving water resistance and mechanical properties

Active Publication Date: 2022-02-15
郑州中科新兴产业技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the common technical problems of poor storage stability, poor adhesion, and slow drying speed of water-based epoxy dispersions or emulsions, the present invention proposes a water-based epoxy resin dispersion and a preparation method thereof, which have storage stability and excellent adhesion , less pollution, simple preparation process, moderate cost, etc.

Method used

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  • Waterborne epoxy resin dispersion and preparation method thereof
  • Waterborne epoxy resin dispersion and preparation method thereof
  • Waterborne epoxy resin dispersion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A water-based epoxy resin dispersion, comprising the following components in parts by weight:

[0043] Epoxy resin with an epoxy equivalent of 196: 410 parts;

[0044] Bisphenol A: 100.2 parts;

[0045] Tetrabutylammonium bromide: 0.1 part;

[0046] Polyetheramine M-1000: 20.4 parts;

[0047] Ethanolamine: 41.7 parts;

[0048] Acrylic acid: 7.6 parts;

[0049] N,N-Dimethylethanolamine: 9.6 parts;

[0050] Propylene glycol methyl ether: 170 parts;

[0051] Deionized water: 700 parts.

[0052] The preparation technology of this aqueous epoxy resin dispersion is:

[0053] (1) Keep the temperature of the reactor at 80°C, and replace the air in the reactor with nitrogen, then add epoxy resin, bisphenol A and tetrabutylammonium bromide, control the stirring speed to 200 rpm, and rapidly raise the temperature to React at a constant temperature of 160°C for 2 hours to obtain prepolymer A, then lower the temperature to 115°C, add propylene glycol methyl ether to dilute; ...

Embodiment 2

[0058] A water-based epoxy resin dispersion, comprising the following components in parts by weight:

[0059] Epoxy resin with an epoxy equivalent of 222: 680 parts;

[0060] Bisphenol A: 148.5 parts;

[0061] Tetrabutylammonium bromide: 0.17 parts;

[0062] Polyetheramine M-2070, M-1000: 42.7 parts, 8 parts;

[0063] Isopropanolamine: 67.1 parts;

[0064] Methacrylic acid: 20.2 parts;

[0065] N,N-Dimethylethanolamine: 21.2 parts;

[0066] Propylene glycol methyl ether: 306 parts;

[0067] Deionized water: 1480 parts.

[0068] The preparation technology of this aqueous epoxy resin dispersion is:

[0069] (1) Keep the temperature of the reactor at 80°C, and replace the air in the reactor with nitrogen, then add epoxy resin, bisphenol A and tetrabutylammonium bromide, control the stirring speed to 150 rpm, and rapidly raise the temperature to React at a constant temperature of 145°C for 2.5 hours to obtain prepolymer A, then cool down to 113°C, add propylene glycol meth...

Embodiment 3

[0073] A water-based epoxy resin dispersion, comprising the following components in parts by weight:

[0074] Epoxy resin with an epoxy equivalent of 186: 855 parts;

[0075] Bisphenol A: 291.1 parts;

[0076] Tetrabutylammonium bromide: 0.23 parts;

[0077] Polyetheramine M-3085: 92 parts;

[0078] Ethanolamine: 74.4 parts;

[0079] Methacrylic acid: 26.2 parts;

[0080] N,N-Dimethylethanolamine: 27.4 parts;

[0081] Propylene glycol butyl ether: 491 parts;

[0082] Deionized water: 1357 parts.

[0083] The preparation technology of this aqueous epoxy resin dispersion is:

[0084] (1) Keep the temperature of the reactor at 80°C, and replace the air in the reactor with nitrogen, then epoxy resin, bisphenol A and tetrabutylammonium bromide, control the stirring speed at 185 rpm, and quickly raise the temperature to 135 ℃ constant temperature reaction for 3.5 hours to obtain prepolymer A, then lower the temperature to 90 ℃, add propylene glycol butyl ether to dilute;

...

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Abstract

The invention provides a waterborne epoxy resin dispersion, and aims at solving the technical problems of poor storage stability, low drying speed and poor adhesion generally existing in waterborne epoxy dispersions or emulsions. The waterborne epoxy resin dispersion is prepared from the following materials in parts by weight: 410-855 parts of epoxy resin; 100-310 parts of bisphenol A; 0.1-0.35 parts of a catalyst; 15.4-113.5 parts of polyether amine; 41.7-74.4 parts of a primary amine monomer; 7.6-37.5 parts of a vinyl acid monomer; 9.6-44.3 parts of a neutralizing agent; 127-689 parts of a cosolvent; and 569-2056 parts of deionized water. The particle size of the waterborne epoxy resin dispersion is smaller than 200 nm, the waterborne epoxy resin dispersion can be stored for a long time, and a coating film has excellent adhesive force, good water resistance and salt fog resistance, high drying speed and high hardness. Meanwhile, the preparation method has the advantages of being energy-saving, environmentally friendly, low in cost, easy and convenient in production and preparation and the like.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a water-based epoxy resin dispersion and a preparation method thereof. Background technique [0002] Environmental friendliness has become the theme of development in the 21st century. With the acceleration of national environmental governance work, especially the implementation of a series of policies restricting the production and use of traditional solvent-based coatings, environmentally friendly coatings represented by water-based coatings will usher in great development and be more widely used. Compared with traditional solvent-based coatings, water-based coatings use water as the main solvent, and VOC emissions can be reduced from about 70% of solvent-based coatings to less than 18%. Fire hazards, improve the operating environment. Therefore, the research and development of water-based coatings has great economic and social benefits. [0003] Epoxy res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/10C08G59/14C08G59/17C09D7/20
CPCC09D163/10C09D7/20C08G59/1466C08G59/1477
Inventor 张延强袁东明李玉吴琼
Owner 郑州中科新兴产业技术研究院
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