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High temperature resistant liquid anhydride curing agent and preparation method thereof

An acid anhydride curing agent and high-temperature-resistant technology, which is applied in the field of epoxy resin curing agent and high-temperature-resistant liquid anhydride curing agent. Excellent internal stress, mechanical strength, and high insulation resistivity

Inactive Publication Date: 2011-12-14
舒城金泽信环保材料有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

All the above-mentioned acid anhydride curing agents cannot withstand the high temperature of 200°C after being compounded with epoxy resin and cured. Although the toughness is improved compared with room temperature curing epoxy resin, it is still not ideal and cannot meet the requirements of the electronic and electrical industry for perfusion. The sealing material has high toughness, low stress, and special requirements for high temperature resistance

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of liquid anhydride curing agent is as follows:

[0036] (1) Weigh the raw materials according to the formula ratio;

[0037] (2) Add the weighed diethylene glycol and triethanolamine into the reaction kettle and stir;

[0038] (3) Pour the phenol into the reaction kettle after heating and melting, mix with diethylene glycol and triethanolamine in the kettle, and stir evenly;

[0039] (4) After stirring the mixture in step (3) for 30 minutes, add concentrated sulfuric acid and continue stirring for half an hour, then add maleic anhydride in batches and keep stirring;

[0040] (5) After all the maleic anhydride has been added, start to heat the system. When the temperature of the material rises to 80°C, stop heating. After the maleic anhydride is completely melted, stir for half an hour, vacuumize to remove the water, and wait for When the material cools down naturally to about 50°C, it can be discharged out of the kettle.

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Abstract

The invention discloses a high-temperature-resistant liquid anhydride curing agent, comprising the following components in parts by weight: 45-55 parts of maleic anhydride, 5-15 parts of phenyl hydroxide, 33-35 parts of diethylene glycol, 4-6 parts of triethanolamine and 1-1.2 parts of concentrated sulphuric acid. The raw materials are mixed according to requirements and react to generate the curing agent disclosed by the invention, then the curing agent disclosed by the invention can cure epoxy resin at the high temperature of 150 DEG C after being subjected to glue mixing with epoxy resin, the cured epoxy resin has high toughness and excellent mechanical strength, working temperature can resist 200 DEG C, insulation resistance is more than 1012 Omega, and the curing agent is applicable to filling and sealing constructions on a dry type transformer, a mutual inductor, a relay, a temperature sensor and various integrated circuits.

Description

[0001] technical field [0002] The present invention relates to a curing agent, specifically a novel epoxy resin curing agent, specifically a high temperature resistant liquid anhydride curing agent. [0003] Background technique [0004] In the field of epoxy resin, the most widely used anhydride curing agents at home and abroad are phthalic anhydride and maleic anhydride. After that, 647 liquid anhydrides, 70 and 80 liquid anhydrides were produced. All the above-mentioned acid anhydride curing agents cannot withstand the high temperature of 200°C after being compounded with epoxy resin and cured. Although the toughness is improved compared with room temperature curing epoxy resin, it is still not ideal and cannot meet the requirements of the electronic and electrical industry for perfusion. The sealing material has high toughness and low stress, and has special requirements for high temperature resistance. [0005] Contents of the invention [0006] The invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/40C08G59/64C08G59/62C08G59/58
Inventor 郝玉龙吴月荣
Owner 舒城金泽信环保材料有限公司
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