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A kind of epoxy curing agent and its preparation method, epoxy resin composition and its preparation method and application

An epoxy curing agent and epoxy resin technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve problems such as difficult to control, low solid content, easy blackening and mildew, etc., to meet the requirements of fast surface drying and amine odor Lightweight, fast dry time effect

Active Publication Date: 2021-02-02
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of beautifying agent has good brightness, it is easy to become black and moldy, which will affect the overall decorative effect
[0006] The patent document with the publication number CN104004309A discloses a ceramic tile gap beautifying agent. The beautifying agent has brighter luster, rich colors and better decorative effects, but its application is affected by its low solid content and easy shrinkage.
[0007] The patent document whose publication number is CN101585958A discloses a method for preparing a curing agent by glycidyl ether modified cycloaliphatic amine, but the target product obtained by modification is a mixture, and its molecular structure is relatively complicated and difficult to control during the modification process. Conducive to industry application

Method used

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  • A kind of epoxy curing agent and its preparation method, epoxy resin composition and its preparation method and application
  • A kind of epoxy curing agent and its preparation method, epoxy resin composition and its preparation method and application
  • A kind of epoxy curing agent and its preparation method, epoxy resin composition and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] (1) Preparation of epoxy curing agent

[0106] 1) Under nitrogen protection, react piperazine and acrylonitrile in methanol at a molar ratio of 1:1 at 60°C for 5 hours to obtain reaction intermediate I;

[0107] 2) In the high-pressure reaction kettle, first replace the air in the kettle with nitrogen for 3 times, and then use hydrogen for 3 times to replace the nitrogen in the kettle; then pressurize the hydrogen to 5MPa, heat up to 100°C, and add the prepared Reaction intermediate I, react until the pressure drops to 1MPa and complete the hydrogenation reaction to obtain reaction intermediate II;

[0108] 3) The prepared reaction intermediate II is subjected to rotary steaming to remove methanol, the condition of rotary steaming is that the temperature is 70°C, and the vacuum pressure is 20KPa; atmospheric distillation removes piperazine, and the condition of atmospheric distillation is a rectifying column The temperature is controlled at 150°C; finally, the target p...

Embodiment 2

[0116] (1) Preparation of epoxy curing agent

[0117] 1) Under nitrogen protection, react piperazine and acrylonitrile in methanol at a molar ratio of 1:1.1 at 50°C for 6 hours to obtain reaction intermediate I;

[0118] 2) In the high-pressure reaction kettle, first use nitrogen to blow 3 times to replace the air in the kettle, then use hydrogen to blow 3 times to replace the nitrogen in the kettle; then pressurize the hydrogen to 5MPa, raise the temperature to 110°C, and add Reaction intermediate I, react until the pressure drops to 1MPa and complete the hydrogenation reaction to obtain reaction intermediate II;

[0119] 3) The prepared reaction intermediate II is subjected to rotary steaming to remove methanol, the condition of rotary steaming is that the temperature is 80°C, and the vacuum pressure is 25KPa; atmospheric distillation removes piperazine, and the condition of atmospheric distillation is rectification column The temperature is controlled at 160°C; finally, th...

Embodiment 3

[0127] (1) Preparation of epoxy curing agent

[0128] 1) Under nitrogen protection, react piperazine and acrylonitrile in methanol at a molar ratio of 1:1 at 55°C for 5 hours to obtain reaction intermediate I;

[0129] 2) In the high-pressure reaction kettle, first use nitrogen to blow the air in the replacement kettle for 3 times, and then use hydrogen to blow the nitrogen in the replacement kettle for 3 times; Reaction intermediate I, react until the pressure drops to 1MPa and complete the hydrogenation reaction to obtain reaction intermediate II;

[0130] 3) The prepared reaction intermediate II is subjected to rotary steaming to remove methanol, the condition of rotary steaming is that the temperature is 60°C, and the vacuum pressure is 20KPa; atmospheric distillation removes piperazine, and the condition of atmospheric distillation is a rectifying column The temperature is controlled at 150°C; finally, the target product aminopropylpiperazine is obtained after vacuum dis...

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Abstract

The invention belongs to the technical field of epoxy resins, and in particular relates to an epoxy curing agent and its preparation method, an epoxy resin composition and its preparation method and application; The agent includes raw materials of the following components: 10-20 parts of piperazine derivatives, 10-20 parts of aminopropyl piperazine, 10-20 parts of polyetheramine, 10-20 parts of HMDA, 20-30 parts of accelerator, 20 parts ~30 parts diluent. The curing agent obtained in the present invention can achieve rapid surface drying and shoveling effects after being mixed with the main epoxy resin agent at room temperature, and the obtained resin curing agent has relatively high toughness, hardness and weather resistance.

Description

technical field [0001] The invention belongs to the technical field of epoxy resins, and in particular relates to an epoxy curing agent and a preparation method thereof, an epoxy resin composition and a preparation method and application thereof. Background technique [0002] From 2016 to 2017, the beauty sewing industry has developed rapidly, and it has entered the public life more and more widely, becoming a hot product in the decoration field. The ceramic tile gap filling material has developed from white cement to the current beauty gap agent. The products are constantly being updated, and at the same time, environmental protection and aesthetics have been greatly improved. Today's beautician products are generally required to have the advantages of enzyme resistance, antibacterial, high gloss, and waterproof. [0003] The beauty seam industry is a market dominated by builders. The considerable cost of materials determines that the product must have good construction pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C09D163/00
CPCC08G59/5006C08G59/504C08G59/5073C09D163/00
Inventor 王慧骁刘赵兴刘振国周萌张春曹善健孙烨杨洗
Owner WANHUA CHEM GRP CO LTD
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