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Preparation method of waterborne urushiol epoxy emulsion

A water-based paint, phenolic epoxy technology, used in epoxy resin coatings, coatings, natural resin coatings, etc., can solve problems such as poor emulsion performance, achieve strong alkali resistance, mild reaction conditions, good adhesion and flexibility sexual effect

Inactive Publication Date: 2018-05-08
佛山市极加互动科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the performance of the emulsion formed by adding an emulsifier is worse than that formed by the chemical modification method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of water-based urushiol epoxy emulsion, comprising the following steps:

[0016] (1) Urushiol and epoxy resin are added to Tong N at a molar mass ratio of 1:2 2 Protected four-neck flask, heated to 70 ° C to make it uniformly dispersed in xylene solvent, under the catalysis of N, N-dimethylbenzylamine, urushiol epoxy resin was prepared; the N, N-di The addition of methylbenzylamine catalyst is 5% of urushiol and epoxy resin total amount;

[0017] (2) Weigh ethylene glycol diglycidyl ether and ethanolamine in a molar ratio of 4:5, and according to the reaction mechanism of amine groups and epoxy groups, the molar ratio of ethylene glycol diglycidyl ether and ethanolamine is Add the amount of 4:3 into the four-necked flask, react at 85°C for 3 hours, then lower the temperature to 65°C, add the remaining ethanolamine, keep the temperature constant for 5 hours, and rotate the PM solvent to obtain a brown viscous The adduct of thick ethanolamine-ethyle...

Embodiment 2

[0021] (1) Urushiol and epoxy resin are added to Tong N at a molar mass ratio of 1:2 2 Protected four-neck flask, heated to 70 ° C to make it uniformly dispersed in xylene solvent, under the catalysis of N, N-dimethylbenzylamine, urushiol epoxy resin was prepared; the N, N-di The addition of methylbenzylamine catalyst is 5% of urushiol and epoxy resin total amount;

[0022] (2) Weigh ethylene glycol diglycidyl ether and ethanolamine in a molar ratio of 4:5, and according to the reaction mechanism of amine groups and epoxy groups, the molar ratio of ethylene glycol diglycidyl ether and ethanolamine is Add the amount of 4:3 into the four-necked flask, react at 85°C for 3 hours, then lower the temperature to 65°C, add the remaining ethanolamine, keep the temperature constant for 5 hours, and rotate the PM solvent to obtain a brown viscous The thick ethanolamine-ethylene glycol diglycidyl ether ethanolamine adduct is put into a brown narrow-mouth bottle for later use.

[0023] (...

Embodiment 3

[0026] A preparation method of water-based urushiol epoxy emulsion, comprising the following steps:

[0027] (1) Urushiol and epoxy resin are added to Tong N at a molar mass ratio of 1:2 2 Protected four-neck flask, heated to 70 ° C to make it uniformly dispersed in xylene solvent, under the catalysis of N, N-dimethylbenzylamine, urushiol epoxy resin was prepared; the N, N-di The addition of methylbenzylamine catalyst is 5% of urushiol and epoxy resin total amount;

[0028] (2) Weigh ethylene glycol diglycidyl ether and ethanolamine in a molar ratio of 4:5, and according to the reaction mechanism of amine groups and epoxy groups, the molar ratio of ethylene glycol diglycidyl ether and ethanolamine is Add the amount of 4:3 into the four-necked flask, react at 85°C for 3 hours, then lower the temperature to 65°C, add the remaining ethanolamine, keep the temperature constant for 5 hours, and rotate the PM solvent to obtain a brown viscous The adduct of thick ethanolamine-ethyle...

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PUM

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Abstract

The invention provides a preparation method of a waterborne urushiol epoxy emulsion. The method comprises the following steps that 1, urushiol epoxy resin is prepared; 2, an adduct of ethanolamine-glycol diglycidyl ether ethanolamine is prepared; 3, waterborne urushiol epoxy resin is prepared; 4, a finished product is obtained. Accordingly, adopted process equipment is simple, the reaction condition is mild, and paint film obtained after the prepared urushiol epoxy emulsion is cured has the high alkaline resistance property; meanwhile, a new way is opened up for application of raw lacquer, andthe method has the important significance on high-value utilization of the raw lacquer.

Description

technical field [0001] The invention belongs to the technical field of urushiol epoxy preparation, in particular to a preparation method of water-based urushiol epoxy emulsion. Background technique [0002] Raw lacquer is a natural renewable resource and has been used as a coating for thousands of years. Because the paint film has high gloss, acid resistance, solvent resistance and other properties, it is known as the "king of coatings". But because raw lacquer can not be applied in strong alkaline environment, and to metal adhesion is not strong, therefore limited the application development of raw lacquer. In order to make raw lacquer can be used in a strong alkaline environment, people have done a lot of research in recent years. At present, there are many studies on the modification of urushiol, the main film-forming substance in raw lacquer. But because the price of urushiol is much more expensive relative to the price of bisphenol f-type epoxy resin, it is important ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D193/00C08G59/64
CPCC08G59/64C09D163/00C08L93/00
Inventor 吴兆启
Owner 佛山市极加互动科技有限公司
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