Carbamate mercaptan epoxy curing agent as well as preparation method and application thereof

A urethane-based, epoxy curing agent technology, applied in the direction of epoxy resin glue, epoxy resin coating, adhesives, etc., can solve the problems of coating film disadvantages, long curing process, affecting workers' health, etc., to improve flexibility Sexuality and mechanical properties, improve flexibility and impact resistance, and shorten curing time

Active Publication Date: 2017-09-08
广州飞思合成材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small molecule amine curing agent is highly volatile at room temperature and has a certain degree of irritation, which affects the health of workers; the hygroscopicity is too strong, it needs a long curing process, and causes the disadvantages of the coating film; it must be modified before it can be used.

Method used

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  • Carbamate mercaptan epoxy curing agent as well as preparation method and application thereof
  • Carbamate mercaptan epoxy curing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of mercapto-containing cyclic carbonate: 11.8 parts of glycerol carbonate, 15.9 parts of 3-mercaptopropionic acid, 1.4 parts of p-toluenesulfonic acid, and 2.1 parts of anhydrous magnesium sulfate were added to the reaction flask. React at 80°C for 8 hours, wash and dry to obtain mercapto-containing cyclocarbonate.

[0021] Take 8.2 parts of mercapto-containing cyclocarbonate, 1.2 parts of ethylenediamine, and 0.47 parts of benzyl alcohol, mix them, heat and react in a water bath at 60°C for 2 hours, and obtain an ethylenediaminocarbamate thiol curing agent.

[0022] Take 4.2 parts of curing agent, mix with 0.51 parts of ethylenediamine, 0.04 parts of triethylamine, 9.8 parts of E44 epoxy resin, and 0.98 parts of butyl glycidyl ether, and scrape the film on the tin plate for testing the mechanical properties. Pour onto Teflon plates to test open time.

Embodiment 2

[0026] Take 8.2 parts of mercapto-containing cyclic carbonates in Example 1, 3.4 parts of isophorone diamine, and 0.58 parts of benzyl alcohol, and then heat and react in a water bath at 60°C for 2 hours to obtain isophorone diamine carbamate sulfur Alcohol curing agent.

[0027] Take 3.0 parts of curing agent, mix with 0.84 parts of isophorone diamine, 0.04 parts of triethylamine, 5.7 parts of E44 epoxy resin, and 0.57 parts of butyl glycidyl ether, and scrape the film on the tin plate for testing the mechanical properties , and the remaining material was poured on a polytetrafluoroethylene plate to test the opening time.

Embodiment 3

[0031] Take 8.2 parts of mercapto-containing cyclic carbonates in Example 1, 2.7 parts of m-xylylenediamine, and 0.55 parts of benzyl alcohol and mix them and heat them in a water bath at 60°C for 4 hours to obtain m-xylylenediamine carbamate thiols Hardener.

[0032] Take 4.2 parts of curing agent, mix with 0.04 part of triethylamine, part of E44 epoxy resin, and part of butyl glycidyl ether, scrape the film on the tinplate plate to test the mechanical properties, and pour the rest on the polytetrafluoroethylene plate Test opening hours.

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PUM

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Abstract

The invention discloses a carbamate mercaptan epoxy curing agent as well as a preparation method and application thereof. According to the preparation method, sulfhydryl pentacyclic carbonate and polyamine are taken as raw materials, and the carbamate mercaptan epoxy curing agent is prepared by one-step open-loop reaction. The carbamate mercaptan epoxy curing agent prepared by the preparation method disclosed by the invention is a novel mercaptan compound with a carbamate structure. By utilizing the carbamate mercaptan epoxy curing agent prepared by the preparation method disclosed by the invention, the flexibility and the mechanical properties of the curing agent are effectively increased.

Description

technical field [0001] The invention belongs to the field of epoxy resin curing agents, in particular to a carbamate-based mercaptan epoxy curing agent and its preparation method and application. Background technique [0002] Epoxy resin has excellent chemical resistance, especially acid and alkali resistance, good adhesion to metal, good heat resistance and wear resistance, small volume shrinkage when curing into a film, and excellent electrical properties. It is widely used in adhesive Mixture, electronics industry and coatings. The commonly used epoxy resin has a linear structure and low molecular weight, so it cannot be used alone. It must be cross-linked and cured by adding a curing agent to become a polymer material with excellent performance. Amine curing agent is currently the most widely used epoxy curing agent, which has the characteristics of high reactivity and fast curing speed. However, the small molecule amine curing agent is highly volatile at room temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/66C09D163/00C09J163/00
Inventor 付长清申亮魏健
Owner 广州飞思合成材料有限公司
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