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Preparation method of epoxy resin emulsion

A technology of epoxy resin emulsion and epoxy resin, which is applied in the direction of epoxy resin coatings and coatings, can solve the problems of low strength, poor toughness and poor water resistance of water-based epoxy coatings, and achieve improved water resistance and good centrifugal stability Concentration effect of property and particle size distribution

Active Publication Date: 2015-04-08
大余松瀛化工有限公司
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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-based epoxy coatings prepared by such emulsifiers have poor toughness, low strength, and poor water resistance.

Method used

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  • Preparation method of epoxy resin emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, heat 20g of polyethylene glycol with a molecular weight of 1000, 9.2g of HDI and 0.03g of dibutyltin dilaurate to 70°C under a nitrogen atmosphere, and after stirring for 3 hours, lower the temperature to 60°C and add 1.48g Glycidyl alcohol, continue to react at 60°C for 6 hours to obtain an emulsifier. Take 60g of epoxy resin E51, 3g of propylene glycol methyl ether and 8g of the prepared emulsifier and mix them for emulsification, add 50g of water dropwise within 8min, and increase the emulsification speed from 0 r / min to 2500r / min at the same time, and maintain the speed of 2500r / min Stir at a rotating speed for 10 min to obtain an epoxy resin emulsion.

Embodiment 2

[0021] On the basis of Example 1, 20 g of polyethylene glycol with a molecular weight of 1000 was changed to 80 g of polyethylene glycol with a molecular weight of 4000, and the others remained unchanged.

Embodiment 3

[0023] On the basis of Example 1, 20 g of polyethylene glycol with a molecular weight of 1000 was changed into 120 g of polyethylene glycol with a molecular weight of 6000, and the others remained unchanged.

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Abstract

The invention discloses a preparation method of epoxy resin emulsion, and relates to the field of epoxy resin emulsion and emulsifying preparation of the epoxy resin emulsion. Polyether urethane with the epoxy group as the end group serves as reactive emulsifier, and high-speed mixing is carried out in cooperation with the phase inversion technology to prepare the epoxy resin emulsion. The dispersion phase particles of the emulsion are fine, particle size distribution is concentrated, the emulsion has very good centrifugal stability, freezing and thawing stability and dilution stability, and compared with the epoxy resin emulsion in the prior art, solidified coatings have higher toughness, strength, adhesive force and water resistance.

Description

technical field [0001] The invention relates to a preparation method of epoxy resin emulsion, specifically relates to the preparation of epoxy resin emulsion and its emulsification, and belongs to the technical field of epoxy resin water-based paint. 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. Water-based epoxy coatings have the advantages of very little solvent...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08L63/00C08G18/66C08G18/48C08G18/10C08G18/30C09D163/00C09D7/12
Inventor 周建萍贾仕君刘志雷
Owner 大余松瀛化工有限公司
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