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Epoxy resin curing agent and preparation method

An epoxy resin curing and conditional technology, applied in the direction of microsphere preparation, microcapsule preparation, etc., can solve the problems of reducing the performance of epoxy resin, poor water resistance of curing agent, and inhalation

Inactive Publication Date: 2020-10-27
JIANGSU LIHONG TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high volatility of the existing epoxy resin curing agent itself, the user will be forced to inhale it when using it, which will cause human injury. Poor performance, causing the curing agent to precipitate, thereby reducing the performance of the epoxy resin

Method used

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  • Epoxy resin curing agent and preparation method
  • Epoxy resin curing agent and preparation method
  • Epoxy resin curing agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] An epoxy resin curing agent, comprising the following raw materials in parts by weight: 3 parts of component A, 3 parts of component B, and 30 parts of carbon nanotubes;

[0037] This epoxy resin curing agent is made by following steps:

[0038] Step S1: adding carbon nanotubes into mixed acid, at a temperature of 60°C and a frequency of 30kHz, ultrasonic treatment was performed for 1 hour, then the temperature was raised to 90°C, and the temperature was kept for 3 hours, and deionized water was added until the pH was 6. The filtrate was centrifuged at 10000r / min for 5 minutes to remove the supernatant, the precipitate was washed with deionized water until the pH of the cleaning solution was 7, and dried to obtain modified carbon nanotubes;

[0039] Step S2: Add the modified carbon nanotubes prepared in step S1 into deionized water, disperse until uniformly dispersed, then add component A and component B, and stir for 30 minutes at a rotational speed of 300r / min, Under...

Embodiment 2

[0050] An epoxy resin curing agent, comprising the following raw materials in parts by weight: 4 parts of component A, 4 parts of component B, 40 parts of carbon nanotubes;

[0051] This epoxy resin curing agent is made by following steps:

[0052] Step S1: adding carbon nanotubes into mixed acid, at a temperature of 60°C and a frequency of 30kHz, ultrasonic treatment was performed for 1 hour, then the temperature was raised to 90°C, and the temperature was kept for 3 hours, and deionized water was added until the pH was 6. The filtrate was centrifuged at 10000r / min for 5 minutes to remove the supernatant, the precipitate was washed with deionized water until the pH of the cleaning solution was 7, and dried to obtain modified carbon nanotubes;

[0053] Step S2: Add the modified carbon nanotubes prepared in step S1 into deionized water, disperse until uniformly dispersed, then add component A and component B, and stir for 30 minutes at a rotational speed of 300r / min, Under the...

Embodiment 3

[0064] An epoxy resin curing agent, comprising the following raw materials in parts by weight: 5 parts of component A, 5 parts of component B, and 50 parts of carbon nanotubes;

[0065] This epoxy resin curing agent is made by following steps:

[0066] Step S1: adding carbon nanotubes to mixed acid, at a temperature of 65°C and a frequency of 50kHz, performing ultrasonic treatment for 1.5 hours, then raising the temperature to 100°C, keeping the temperature for 5 hours, adding deionized water until the pH is 7, Centrifuge the filtrate for 10 minutes at a rotational speed of 12000 r / min to remove the supernatant, wash the precipitate with deionized water until the pH of the cleaning solution is 7, and dry to obtain modified carbon nanotubes;

[0067] Step S2: Add the modified carbon nanotubes prepared in step S1 into deionized water, disperse until uniformly dispersed, then add component A and component B, and stir for 40 minutes at a rotational speed of 500 r / min, Under the c...

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Abstract

The invention discloses an epoxy resin curing agent and a preparation method thereof. The epoxy resin curing agent comprises the following raw materials in parts by weight: 3-5 parts of a component A,3-5 parts of a component B and 30-50 parts of carbon nanotubes. The component A has very good volatility resistance and does not volatilize in a use process, so that a user is protected from being forced to suck and injure a human body; the component B is an acrylic microsphere emulsion prepared from methyl methacrylate and butyl acrylate as raw materials; the acrylic resin has good water resistance; further, tetraethoxysilane is used to connect the surface of acrylic acid with nano-silicon, and then the gamma-aminopropyltriethoxysilane is hydrolyzed to generate silanol, which reacts with active groups on the surface of the acrylic acid / nano silicon composite microsphere to generate silicon-oxygen bonds to improve the water resistance effect, so that the component A and the component B are further embedded into the curing agent prepared from the carbon nanotubes, and the curing agent has good water resistance and is not prone to volatilization, and the strength of the epoxy resin canbe improved.

Description

technical field [0001] The invention belongs to the technical field of curing agent preparation, and in particular relates to an epoxy resin curing agent and a preparation method. Background technique [0002] Epoxy resin is a thermoplastic polymer prepolymer, which has excellent mechanical properties and thermal properties, so it is widely used in various fields. Epoxy resin itself has a thermoplastic linear structure. After being heated, the solid resin can soften and melt, and become viscous or liquid, and the viscosity of the liquid resin decreases when heated. The epoxy resin must react with the curing agent to transform it into a high polymer with a three-dimensional network cubic structure before showing a series of excellent properties. Therefore, the structure and quality of the curing agent will directly affect the application effect of the epoxy resin. [0003] Due to the high volatility of the existing epoxy resin curing agent itself, the user will be forced to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/54C08G59/56C08G59/40C08F220/14C08F220/18C08K9/02C08K3/04B01J13/02
CPCB01J13/02C08F220/14C08G59/4007C08G59/54C08G59/56C08K9/02C08K2201/011C08K3/041C08F220/1804
Inventor 冯磊张双柱葛正国
Owner JIANGSU LIHONG TECH DEV CO LTD
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