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Process for producing cold curing watersoluble solidifying agent of epoxy resin

A water-based epoxy resin, room temperature curing technology, applied in the chemical industry, can solve the problems of slow curing speed and long time at room temperature

Inactive Publication Date: 2009-04-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a curing accelerator solves the problem of too slow curing at room temperature and takes too long, and shows good curing performance and coating film performance at room temperature

Method used

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  • Process for producing cold curing watersoluble solidifying agent of epoxy resin
  • Process for producing cold curing watersoluble solidifying agent of epoxy resin
  • Process for producing cold curing watersoluble solidifying agent of epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Capping of modified polyamine: Add 23.00g of diethylenetriamine into the reaction kettle, add 14.80g of monoepoxy 501 dropwise into the four-necked flask at a constant temperature of 60°C, and react for 3h

[0020] b. Addition of modified polyamine: add 13.80g of E-51 dropwise to the reaction kettle at a constant temperature of 60°C, and react for 4 hours.

[0021] c. Salt formation of modified polyamine: Add 35.00 kg of acetic acid dropwise to the reactor at a constant temperature of 60°C to form a salt, continue stirring for a period of time, then add water to dilute to a solid content of 60%, and stir for 1 hour.

[0022] d. Add 0.43g of DMP-30 dropwise to the reactor at a constant temperature of 60°C, stir for 0.2h, discharge, and store for later use.

[0023] e, preparation of two-component waterborne epoxy resin paint film

[0024] A component: water-based epoxy resin curing agent B component: water-based epoxy resin emulsion

[0025] Mix according to the rat...

Embodiment 2

[0031] a. Capping of modified polyamine: Add 23.00g of diethylenetriamine into the reaction kettle, add 39.00g of monoepoxy 501 dropwise into the four-necked flask at a constant temperature of 75°C, and react for 4.5h

[0032] b. Addition of modified polyamine: add 45.00g of E-44 dropwise to the reaction kettle at a constant temperature of 75°C, and react for 6 hours.

[0033] c. Salt formation of modified polyamine: Add 7.50 g of acetic acid dropwise to the reactor at a constant temperature of 75°C to form a salt, continue stirring for a period of time, then add water to dilute to a solid content of 60%, and stir for 2 hours.

[0034] d. Finally, add 1.15 g of quaternary ammonium salt (octadecyl tertiary amine) dropwise into the reactor at a constant temperature of 75° C., stir for 0.6 h, discharge, and store for later use.

[0035] e, preparation of two-component waterborne epoxy resin paint film

[0036] A component: water-based epoxy resin curing agent B component: water-...

Embodiment 3

[0042] a. Capping of modified polyamine: Add 23.00 g of diethylenetriamine into the reaction kettle, add 22.00 g of monoepoxy 501 dropwise into the four-necked flask at a constant temperature of 90° C., and react for 6 hours.

[0043] b. Addition of modified polyamine: add 28.00g of E-20 dropwise to the reaction kettle at a constant temperature of 90°C, and react for 8 hours.

[0044] c. Salt formation of modified polyamine: Add 21.50 g of acetic acid dropwise to the reactor at a constant temperature of 90°C to form a salt, continue to stir for a period of time, then add water to dilute to a solid content of 60%, and stir for 3 hours.

[0045] d. Finally, add 1.89 g of boron trifluoride amine complex dropwise into the reactor at a constant temperature of 90° C., stir for 1 hour, discharge, and store for later use.

[0046] e, preparation of two-component waterborne epoxy resin paint film

[0047] A component: water-based epoxy resin curing agent B component: water-based epoxy...

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Abstract

The invention relates to a room temperature curing waterborne epoxy resin curing agent and a preparation method thereof. The method comprises the following detailed steps of: (1) sealed end: at constant temperature between 60 DEG C and 90 DEG C, mono epoxy is dripped into diethylene triamine and the reaction lasts for 3h to 6h; (2) addition: bi-epoxy is dripped into the mixture obtained at Step (1) at a constant temperature of 60 DEG C to 90 DEG C and the reaction lasts for 4h to 8h; (3) salifying: acetate is added into the mixture obtained at the step (2) at a constant temperature of 60 DEG C to 90 DEG C to carry out salifying, the mixture is stirred for a while, then water is added into the mixture to dilute until the solid content is 60 percent and stirring is kept on for 1h to 3h; and (4) a curing catalyst is added into the mixture obtained at the step (3) at constant temperature of 60 DEG C to 90 DEG C, the content of the curing catalyst is 0.1 percent to 5 percent, stirring is kept on for 0.2h to 1h and then the finished product is discharged. The waterborne epoxy resin curing agent has relatively good curing performance and water-solubility, contains 60 percent of solid content and is a pale yellow liquid. The addition of the curing catalyst solves the problems of the too low speed and too long period of curing at room temperature and excellent curing performance and film properties can be fulfilled at room temperature.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a preparation method of a room-temperature curing water-based epoxy resin curing agent. Background technique [0002] Traditional solvent-based epoxy resin coatings, because they contain a large amount of organic solvents, have brought serious harm to the ecological environment and human health. With the increasing awareness of environmental protection and the continuous strengthening of environmental protection laws and regulations, the coating industry has accelerated to the four E (economic , Environmental friendliness, energy saving, high production efficiency), waterborne epoxy resin coating is one of them. In the application of epoxy resin, curing agent occupies a very important position. Therefore, it is imperative to research and develop water-based epoxy resin curing agent. [0003] Aliphatic and alicyclic amino compounds are used as epoxy resin cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C09D163/00
Inventor 刘晓非李爱萍熊熠燕曾安蓉
Owner TIANJIN UNIV
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