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A low-cost, environment-friendly polyamide epoxy resin curing agent

An epoxy resin curing and polyamide technology, which is applied in the field of curing agents, can solve the problems of no use of leftovers, unenvironmental curing agent production, poor temperature resistance, etc., so as to relieve development bottlenecks, eliminate environmental pollution problems, Good temperature resistance

Active Publication Date: 2018-06-26
HUBEI GREENHOME MATERIALS TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of low-cost, environment-friendly type polyamide epoxy resin curing agent, to solve the leftovers in the existing benzyl benzoate industry, there is no way to use, the environmental pollution caused by incineration or landfill, the existing polyamide The cured product of amide epoxy resin has low hardness, poor temperature resistance, too slow curing reaction, and the production of curing agent is not environmentally friendly and other technical problems

Method used

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  • A low-cost, environment-friendly polyamide epoxy resin curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Add 33.0 parts by weight of diethylenetriamine, 35.5 parts by weight of benzyl benzoate leftovers, and 36.0 parts by weight of dimer acid in a 1000-liter reactor with agitator and condenser, start stirring, and heat the reactor with an electric heating mantle Heat to 130°C and keep it warm for 1 hour, then raise the temperature to 180°C, control the temperature to rise slowly at a rate of 5°C every half hour, and gradually raise the temperature to 220°C, the total reaction time between 180-220°C is 4 hours, and finally vacuum Dehydration to anhydrous distilled. The remaining material in the reactor is the product of the present invention.

Embodiment 2

[0015] Add 25.1 parts by weight of diethylenetriamine, 39.0 parts by weight of benzyl benzoate waste, and 32.0 parts by weight of dimer acid in a 1000-liter reactor with agitator and condenser, start stirring, and heat the reactor with an electric heating mantle. Heat to 130°C and keep it warm for 1 hour, then raise the temperature to 180°C, control the temperature to rise slowly at a rate of 5°C every half hour, and gradually raise the temperature to 220°C, the total reaction time between 180-220°C is 4 hours, and finally vacuum Dehydration to anhydrous distilled. The remaining material in the reactor is the product of the present invention.

Embodiment 3

[0017] Add 30.0 parts by weight of diethylenetriamine, 38 parts by weight of benzyl benzoate leftovers, and 35.2 parts by weight of dimer acid in a 1000-liter reactor with agitator and condenser, start stirring, and heat the reactor with an electric heating mantle Heat to 130°C and keep it warm for 1 hour, then raise the temperature to 180°C, control the temperature to rise slowly at a rate of 5°C every half hour, and gradually raise the temperature to 220°C, the total reaction time between 180-220°C is 4 hours, and finally vacuum Dehydration to anhydrous distilled. The remaining material in the reactor is the product of the present invention.

[0018] In order to verify the actual effect of the present invention, the curing agent obtained in Examples 1-3 is compared with the existing polyamide epoxy curing agent, and the test data are shown in the table below:

[0019]

[0020] The above data show that the strength, temperature resistance and curing reaction speed of the ...

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Abstract

The invention relates to a low-cost, environment-friendly polyamide epoxy resin curing agent. Compared with the traditional polyamide epoxy resin curing agent, the present invention introduces the leftovers from producing benzyl benzoate to react together, and synthesizes a polyamide curing agent product with lower cost and higher strength, thereby solving the problem of traditional polyamide curing agent Reacting with epoxy resin has the disadvantages of poor hardness, low heat distortion temperature, and high production cost. More importantly, it can solve the development bottleneck problem in the benzyl benzoate industry due to the inability to handle the leftovers.

Description

technical field [0001] The invention relates to a curing agent, in particular to a low-cost, environment-friendly polyamide epoxy resin curing agent. technical background [0002] Traditionally produced polyamide epoxy curing agents are generally synthesized from polyamines and dimer acids, and are widely used in epoxy applications due to their mild curing reaction and good toughness of cured products. However, due to its own molecular structure characteristics, it also determines that its cured product has low hardness, poor temperature resistance, and too slow curing reaction. [0003] As a common chemical industrial product, benzyl benzoate has been widely used in food, medicine, textile and other fields. The leftovers of benzyl benzoate in the production process are very large, generally including about 35% Benzyl benzoate, 20% to 30% fluorenone, about 1% benzoic acid and other impurities. The appearance is black, the viscosity is very high or even solid at room temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/34C08G59/44
CPCC08G59/44C08G69/34
Inventor 付浩清李福志
Owner HUBEI GREENHOME MATERIALS TECH INC