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Waterborne epoxy emulsion, waterborne epoxy resin coating and preparation method thereof

A water-based epoxy emulsion and water-based epoxy coating technology, applied in epoxy resin coatings, coatings, etc., can solve the problems of reducing the curing temperature of coatings, poor stability, and reducing the VOC value of coatings, achieve good mechanical properties, and solve stability problems. Poor performance and excellent stability

Inactive Publication Date: 2018-05-18
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a kind of water-based epoxy emulsion, water-based epoxy paint and preparation method thereof, improve the stability of water-based epoxy emulsion and prolong the service life of coating, reduce the curing temperature of coating, reduce the VOC of coating value, solve the problems of poor stability, short application period, and high temperature curing of water-based epoxy coatings in the prior art, and at the same time improve the mechanical properties and chemical corrosion resistance of water-based epoxy coatings

Method used

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  • Waterborne epoxy emulsion, waterborne epoxy resin coating and preparation method thereof
  • Waterborne epoxy emulsion, waterborne epoxy resin coating and preparation method thereof
  • Waterborne epoxy emulsion, waterborne epoxy resin coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh 20g of polyethylene glycol (molecular weight 3000-4500) and 0.98g of maleic anhydride in a reaction vessel, heat up to 83°C under mechanical stirring, and react for 2.5h; add 3.92g of epoxy resin E -51 (the number average molecular weight is 392), rapidly warming up to 115 ℃, reaction 4h, obtains water-based epoxy emulsifier; (the molar ratio of polyethylene glycol / maleic anhydride / epoxy resin E-51 is 1 :2:2);

[0031] (2) Weigh 15g of water-based epoxy emulsifier and 83g of epoxy resin E-51 in a reaction vessel, under mechanical stirring, the rotating speed is 1200r / min, slowly add 100g of water by phase inversion technology to obtain water-based epoxy Lotion;

[0032] (3) Weigh 29.2g of triethylenetetramine into the reaction vessel, heat up to 55°C, add 29.4g of epoxy resin E-51 (number average molecular weight is 392), and react for 4h; then add 10g of polyethylene glycol dishrink Glyceryl ether (Guangzhou Jingwei Chemical Co., Ltd., molecular weight 500)...

Embodiment 2

[0040] (1) Weigh 20.00g of polyethylene glycol (molecular weight 3000-4500) and 0.98g of maleic anhydride in a reaction vessel, heat up to 85°C under mechanical stirring, and react for 2h; add 3.92g of epoxy resin E -51 (the number-average molecular weight is 392), rapidly warming up to 120 ℃, reaction 3.5h, obtains water-based epoxy emulsifier; (the molar ratio of polyethylene glycol / maleic anhydride / epoxy resin E-51 is 1:2:2);

[0041](2) Weigh 15.00g of water-based epoxy emulsifier and 90.00g of epoxy resin E-51 in the reaction vessel, under mechanical stirring, the rotating speed is 1300r / min, slowly add 105.00g of water by phase inversion technology, to obtain Water-based epoxy emulsion;

[0042] (3) Weigh 29.20g of triethylenetetramine into the reaction vessel, raise the temperature to 65°C, add 24.5g of epoxy resin E-51 (the number average molecular weight is 392), react for 3 hours, then add 12.50g of polyethylene glycol Glycidyl ether (Guangzhou Jingwei Chemical Co....

Embodiment 3

[0050] (1) Weigh 20.00g of polyethylene glycol (molecular weight 3000-4500) and 0.98g of maleic anhydride in a reaction vessel, heat up to 88°C under mechanical stirring, and react for 2h; add 3.92g of epoxy resin E -51 (the number-average molecular weight is 392), heat up rapidly to 125°C, react for 3 hours to obtain a water-based epoxy emulsifier; the molar ratio of polyethylene glycol / maleic anhydride / epoxy resin E-51 is 1: 2:2;

[0051] (2) Weigh 15.00g of water-based epoxy emulsifier and 90.00g of epoxy resin E-51 in the reaction vessel, under mechanical stirring, the speed is 1400r / min, slowly add 105.00g of water by phase inversion technology to obtain water-based epoxy emulsion;

[0052] (3) Weigh 29.20g of triethylenetetramine into the reaction vessel, raise the temperature to 65°C, add 34.30g of epoxy resin E-51, react for 3.5h, then add 6.25g of polyethylene glycol diglycidyl ether (Guangzhou Wei Chemical Co., Ltd., wherein the number-average molecular weight of p...

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Abstract

The invention belongs to the technical field of epoxy coatings, and discloses a waterborne epoxy emulsion, a waterborne epoxy resin coating and a preparation method thereof. The preparation method ofthe waterborne epoxy emulsion comprises the steps that 1, polyethylene glycol and maleic anhydride are subjected to a heating reaction, then, epoxy resin is added for a continuous heating reaction, and an epoxy resin emulgator is obtained; 2, the emulgator and the epoxy resin are mixed, and the waterborne epoxy emulsion is obtained through the phase inversion technology. The preparation method ofthe waterborne epoxy coating comprises the steps that 1, an amine compound and epoxy resin are subjected to a heating reaction, polyethylene glycol diglycidyl ether is added for a continuous heating reaction, butyl vinyl ether is added for a continuous reaction, and a waterborne curing agent is obtained; 2, the waterborne curing agent and the waterborne epoxy emulsion are mixed, and the waterborneepoxy coating is obtained. The waterborne epoxy emulsion is good in stability; the waterborne epoxy coating is cured at the room temperature, the application period is long, and the formed coating has the good mechanical property, hardness and acid and base resistance.

Description

technical field [0001] The invention belongs to the technical field of epoxy paint, and relates to a water-based epoxy emulsion, a water-based epoxy paint and a preparation method thereof. technical background [0002] At present, epoxy resin is mainly used in the coating industry and electronic packaging industry, covering many civil and military fields such as automobiles, ships, transportation, electric power, energy, food, etc., and the domestic and foreign market demand continues to expand, especially in the application of coatings. Great prospects for development. However, because epoxy resin is insoluble in water, traditional epoxy coatings use organic solvents as solvents, resulting in the emission of volatile organic compounds during use, which pollutes the environment and poses a threat to people's health. In recent years, with the development of the world economy and science and technology, people pay more attention to the use of non-toxic, non-polluting and envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C08J3/03C08L63/00C08G59/42C09D163/00
CPCC08G59/5013C08G59/4238C08J3/03C08J2363/00C09D163/00
Inventor 胡继文肖运彬李志华梁晟源
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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