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High-performance epoxy resin curing agent and preparation method thereof

An epoxy resin curing, high-performance technology, applied in the field of curing agent preparation, can solve the problems of low temperature resistance, poor mechanical properties, low curing activity of curing agent, single performance, etc.

Inactive Publication Date: 2021-10-22
杨向娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the curing agent has low curing activity, single performance, and strong volatility, which cannot effectively improve the problems of poor mechanical properties such as high brittleness and high temperature resistance after epoxy resin curing

Method used

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  • High-performance epoxy resin curing agent and preparation method thereof
  • High-performance epoxy resin curing agent and preparation method thereof
  • High-performance epoxy resin curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A high-performance epoxy resin curing agent, comprising the following raw materials in parts by weight: 10 parts of cardanol, 5 parts of diethylenetriamine, 5 parts of paraformaldehyde, 30 parts of ethylene glycol, 5 parts of trimellitic anhydride, 1 part of accelerator, 2 parts of agent, 0.1 part of catalyst;

[0047] This high-performance epoxy resin curing agent is made by the following steps:

[0048] The first step is to add cardanol, diethylenetriamine and catalyst into the reaction kettle, stir for 10 minutes at a rotation speed of 60r / min, then raise the temperature to 90°C, add paraformaldehyde to the reaction kettle, and increase the rotation speed to 100r / min. Keeping the temperature constant, after stirring and reacting for 1 hour, the first composition is obtained;

[0049] The second step, add ethylene glycol to the first composition, stir at constant speed for 10 minutes, add trimellitic anhydride, accelerator and auxiliary agent to the reaction kettle, ...

Embodiment 2

[0065] A high-performance epoxy resin curing agent, comprising the following raw materials in parts by weight: 15 parts of cardanol, 8 parts of diethylenetriamine, 7 parts of paraformaldehyde, 35 parts of ethylene glycol, 8 parts of trimellitic anhydride, 1 part of accelerator, 2 parts of agent, 0.1 part of catalyst;

[0066] This high-performance epoxy resin curing agent is made by the following steps:

[0067] The first step is to add cardanol, diethylenetriamine and catalyst into the reaction kettle, stir for 10 minutes at a rotation speed of 80r / min, then raise the temperature to 95°C, add paraformaldehyde to the reaction kettle, increase the rotation speed to 150r / min, Keeping the temperature constant, after stirring and reacting for 1 hour, the first composition is obtained;

[0068] The second step is to add ethylene glycol to the first composition, stir at constant speed for 10 minutes, add trimellitic anhydride, accelerator and auxiliary agent to the reaction kettle,...

Embodiment 3

[0084] A high-performance epoxy resin curing agent, comprising the following raw materials in parts by weight: 20 parts of cardanol, 10 parts of diethylenetriamine, 8 parts of paraformaldehyde, 40 parts of ethylene glycol, 10 parts of trimellitic anhydride, 1 part of accelerator, 2 parts of agent, 0.1 part of catalyst;

[0085] This high-performance epoxy resin curing agent is made by the following steps:

[0086] The first step is to add cardanol, diethylenetriamine and catalyst into the reaction kettle, stir for 10 minutes at a rotation speed of 100r / min, then raise the temperature to 100°C, add paraformaldehyde to the reaction kettle, increase the rotation speed to 200r / min, Keeping the temperature constant, after stirring and reacting for 1 hour, the first composition is obtained;

[0087] The second step, add ethylene glycol to the first composition, stir at constant speed for 10 minutes, add trimellitic anhydride, accelerator and auxiliary agent to the reaction kettle, ...

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Abstract

The invention discloses a high-performance epoxy resin curing agent, which is prepared from the following raw materials in parts by weight: 10 to 20 parts of cardanol, 5 to 10 parts of diethylene triamine, 5 to 8 parts of para-formaldehyde, 30 to 40 parts of ethylene glycol, 5 to 10 parts of trimellitic anhydride, 1 part of an accelerant, 2 parts of an auxiliary agent and 0.1 part of a catalyst. The invention also discloses a preparation method of the high-performance epoxy resin curing agent, which comprises the following steps: 1, adding cardanol, diethylene triamine and a catalyst into a reaction kettle, heating to 90-100 DEG C, adding para-formaldehyde, and reacting for 1 hour under stirring to obtain a first composition; and 2, adding ethylene glycol into the first composition, stirring for 10 minutes, adding trimellitic anhydride, an accelerant and an auxiliary into the reaction kettle, and keeping on stirring for 30-60 minutes. The epoxy resin curing agent provided by the invention not only can improve the toughness and curing rate of cured epoxy resin, but also endows the epoxy resin with flame retardant property and antibacterial property.

Description

technical field [0001] The invention belongs to the technical field of curing agent preparation, and in particular relates to a high-performance epoxy resin curing agent and a preparation method thereof. Background technique [0002] Epoxy resin is known for its excellent mechanical properties, electrical insulation properties, thermal stability, chemical resistance and bonding properties. Cured epoxy resin systems have found a wide range of applications, including coatings, bonding concrete, composite materials, specific examples include epoxy resin composites using carbon fiber and glass fiber reinforcements, protective coatings for metal surfaces, construction products for concrete, cement or ceramic substrates; electrical and electronic, aerospace, Shipping and other fields. [0003] Epoxy resin itself has a thermoplastic linear structure and cannot be used directly. It is necessary to add a second component to the resin to carry out addition polymerization reaction wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/42C08G59/52C08G59/56C08G59/62
CPCC08G59/4223C08G59/4284C08G59/623C08G59/52C08G59/56
Inventor 不公告发明人
Owner 杨向娟
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