Method for preparing water-borne epoxy resin emulsion

A water-based epoxy resin and emulsion technology, applied in epoxy resin coatings, coatings, etc., can solve the problems of poor toughness, poor water resistance, and low strength of water-based epoxy coatings, and achieve good centrifugal stability and concentrated particle size distribution , the effect of toughness

Inactive Publication Date: 2015-10-28
何肖凤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the emulsifiers used in the above patents are polyether-type non-ionic emulsifiers. The water-b...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Preparation of emulsifier

[0017] Octylphenol polyoxyethylene ether and polyoxyethylene sorbitan monolaurate were mixed at a molar ratio of 1:1.1, and 0.6% sodium lauryl sulfate was added, and the temperature was raised to 70°C under nitrogen protection and Stir and react for 4 hours, cool down to 60°C to obtain a prepolymer, then add epoxy alcohol with a molar ratio of 0.5 to octylphenol polyoxyethylene ether, and stir and react for 4 hours under nitrogen protection to obtain an emulsifier;

[0018] 2) Preparation of water-based epoxy resin emulsion

[0019] In terms of mass fraction, heat 300g of epoxy resin E-51 in a water bath to 70°C, then put it into an ultrasonic instrument, add 21g of emulsifier and 5mL of propylene glycol methyl ether under a 6000r / min high shear machine, and start dripping after about 5min Heat the water and keep the temperature in the beaker at about 70°C. Stop adding water dropwise during phase inversion, add the remaining water dropwis...

Embodiment 2

[0021] 1) Preparation of emulsifier

[0022] Octylphenol polyoxyethylene ether and polyoxyethylene sorbitan monolaurate were mixed in a molar ratio of 1:1.1, and 2% sodium lauryl sulfate was added, and the temperature was raised to 70°C under nitrogen protection and Stir and react for 4 hours, cool down to 60°C to obtain a prepolymer, then add epoxy alcohol with a molar ratio of 0.5 to octylphenol polyoxyethylene ether, and stir and react for 4 hours under nitrogen protection to obtain an emulsifier;

[0023] 2) Preparation of water-based epoxy resin emulsion

[0024] In terms of mass fraction, heat 300g of epoxy resin E-51 in a water bath to 70°C, then put it into an ultrasonic instrument, add 21g of emulsifier and 5mL of propylene glycol methyl ether under a 6000r / min high shear machine, and start dripping after about 5min Heat the water and keep the temperature in the beaker at about 70°C. Stop adding water dropwise during phase inversion, add the remaining water dropwise ...

Embodiment 3

[0026] 1) Preparation of emulsifier

[0027] Octylphenol polyoxyethylene ether and polyoxyethylene sorbitan monolaurate were mixed at a molar ratio of 1:1.1, and 6% sodium lauryl sulfate was added, and the temperature was raised to 70°C under nitrogen protection and Stir and react for 4 hours, cool down to 60°C to obtain a prepolymer, then add epoxy alcohol with a molar ratio of 0.5 to octylphenol polyoxyethylene ether, and stir and react for 4 hours under nitrogen protection to obtain an emulsifier;

[0028] 2) Preparation of water-based epoxy resin emulsion

[0029] In terms of mass fraction, heat 300g of epoxy resin E-51 in a water bath to 70°C, then put it into an ultrasonic instrument, add 21g of emulsifier and 5mL of propylene glycol methyl ether under a 6000r / min high shear machine, and start dripping after about 5min Heat the water and keep the temperature in the beaker at about 70°C. Stop adding water dropwise during phase inversion, add the remaining water dropwise ...

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PUM

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Abstract

The invention discloses a method for preparing water-borne epoxy resin emulsion and relates to the water-borne epoxy resin emulsion and emulsifying preparation of the water-borne epoxy resin emulsion. The water-borne epoxy resin emulsion is an emulsifying agent prepared from emulsifier OP-4, polyoxyethylene sorbitan monolaurate and lauryl sodium sulfate which are used as a compound system. Under the action of high shear and ultrasonic waves and with the combination of a phase inversion technology, dispersion phase particles of the prepared epoxy resin emulsion are fine, the particle size distribution is concentrated, and the epoxy resin emulsion has the characteristics of being excellent in centrifugal stability, freeze-thaw stability, dilution stability and the like. Compared with existing epoxy resin emulsion, a cured coating has higher tenacity, strength, adhesive force and water resistance.

Description

technical field [0001] The invention relates to a method for preparing a water-based epoxy resin emulsion, in particular to the preparation of a water-based epoxy resin emulsion and its emulsification, and belongs to the technical field of epoxy resin water-based coatings. Background technique [0002] Traditional anti-corrosion paints are mostly solvent-based paints. These paints contain a large amount of organic solvents, which will volatilize into the atmosphere during the construction process, which is harmful to the health of construction workers and pollutes the environment. In recent years, people's awareness of environmental protection has been continuously enhanced. The environmental protection regulations of various countries in the world have increasingly strict restrictions on the content of volatile organic compounds in coatings. The coating industry is developing in the direction of low pollution and energy saving. Waterborne epoxy coatings have the advantages ...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08L63/00C09D163/00
Inventor 何肖凤
Owner 何肖凤
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