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Epoxy active emulsifier, preparation method, dispersion system containing epoxy active emulsifier and application

A technology of active emulsifier and dispersion system, applied in the direction of epoxy resin coating, coating, anti-corrosion coating, etc., can solve the problems affecting the resistance and storage stability of paint film, achieve good storage stability, reduce dosage, and preparation method simple effect

Active Publication Date: 2021-07-23
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the two emulsifiers used are inactive emulsifiers, and the emulsifiers do not participate in the reaction during the film-forming process. There are free emulsifiers in the system, which affects the resistance and storage stability of the paint film.

Method used

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  • Epoxy active emulsifier, preparation method, dispersion system containing epoxy active emulsifier and application
  • Epoxy active emulsifier, preparation method, dispersion system containing epoxy active emulsifier and application
  • Epoxy active emulsifier, preparation method, dispersion system containing epoxy active emulsifier and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1) Add 53g of hexahydrophthalic anhydride and 1000g of the above-mentioned polyethylene glycol 1 into the reactor, and react at 100°C for 3h to obtain the product A-1;

[0069] 2) Add 6.5 g of sodium hydroxide to 1053 g (0.167 mol) of the above product A-1 for neutralization reaction for 0.5 h to obtain product A-2 (0.167 mol);

[0070] 3) Add 180 g of epoxy resin E20 into the reaction kettle, and then add 2.5 g of triphenylphosphine, and react at a constant temperature of 130° C. for 3 hours to obtain epoxy active emulsifier 1.

Embodiment 2

[0072] 1) Add 53g of trimellitic anhydride and 2000g of polyethylene glycol methyl ether 1 into the reactor, and react at 130°C for 3h to obtain the product A-1;

[0073] 2) Add 10 g of sodium hydroxide to 2053 g (0.25 mol) of the above product A-1 for neutralization reaction for 0.5 h to obtain product A-2 (0.25 mol);

[0074] 3) Add 110 g of epoxy resin E 51 into the reaction kettle, and then add 4.5 g of triphenylphosphine, and react at a constant temperature of 130° C. for 3 hours to obtain epoxy reactive emulsifier 2.

Embodiment 3

[0076] 1) Add 100g of trimellitic anhydride and 1000g of the above-mentioned polyethylene glycol 2 into the reaction kettle, and react at 100°C for 3h to obtain the product A-1;

[0077] 2) Add 10 g of sodium hydroxide to 1100 g (0.25 mol) of the above product A-1 for neutralization reaction for 0.5 h to obtain product A-2 (0.25 mol);

[0078] 3) Add 370g of epoxy resin E 44 into the reactor, and then add 9.5g of triphenylphosphine, and react at a constant temperature of 130°C for 3h to obtain epoxy active emulsifier 3.

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Abstract

The invention provides an epoxy active emulsifier, a preparation method, a dispersion system containing the epoxy active emulsifier and application, and the preparation method comprises the following steps: 1) carrying out esterification reaction on acid anhydride and polyether as shown in a formula I structure to obtain a product A-1; 2) adding alkali into the product A-1, and carrying out a neutralization reaction to obtain a product A-2; and (3) carrying out ring-opening reaction on the product A-2 and epoxy resin to obtain the epoxy active emulsifier, wherein the molar ratio of the anhydride to the polyether shown in the formula I is greater than or equal to 1, the molar ratio of the product A-1 to the alkali is greater than or equal to 1; and the molecular structure of the epoxy resin has at least two epoxy groups. According to the epoxy active emulsifier provided by the invention, the usage amount of the emulsifier is reduced; and in the application, epoxy resin dispersion system with high storage stability can be obtained, and obtained epoxy coating has characteristic of corrosion resistance.

Description

technical field [0001] The invention belongs to the field of coatings and adhesives, and in particular relates to an epoxy active emulsifier containing epoxy groups, carboxyl groups and ethoxyl chain segments, a preparation method thereof, a dispersion system containing the emulsifier and its application. Background technique [0002] Traditional epoxy resin coatings are generally solvent-based, and most of the organic volatiles are flammable, explosive and toxic substances, which are directly discharged into the atmosphere. Under ultraviolet radiation, light smog or acid rain will be formed, which seriously pollutes the environment. Long-term inhalation of these toxic gases by humans can cause respiratory disease, fatigue, memory loss or other neurological disorders. In recent years, laws and regulations on environmental pollution restrictions have been promulgated one after another. Among them, there are two major issues concerning the emission restrictions of VOCs (Volati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/331C08G65/332C08J3/03C08L63/00C09D163/00C09D5/08
CPCC08G65/331C08G65/3328C08J3/03C09D163/00C09D5/08C08J2363/00
Inventor 沈潇斌纪学顺李卫飞王晓曲瑞张成彬周兵王峤郎小俊孙家宽
Owner WANHUA CHEM GRP CO LTD
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