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Graphene modified water-based epoxy curing agent and preparation method thereof

A graphene-modified, water-based epoxy technology, applied in the field of epoxy resin, can solve problems such as thickening, inconvenient storage and transportation, time-consuming and expensive

Active Publication Date: 2020-09-11
江苏道蓬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The wetting and dispersing of graphene in water-based epoxy resin is very difficult and takes a lot of time and cost
[0008] 2. After the graphene is dispersed, it cannot be stored stably, and it will cause sedimentation and coarsening, which will affect the performance
[0009] 3. Due to the nature of the water-based resin, this technical product has many inconveniences in storage and transportation

Method used

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  • Graphene modified water-based epoxy curing agent and preparation method thereof
  • Graphene modified water-based epoxy curing agent and preparation method thereof
  • Graphene modified water-based epoxy curing agent and preparation method thereof

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preparation example Construction

[0025] In another aspect of the embodiments of the present invention, a method for preparing a graphene-modified water-based epoxy curing agent is provided, comprising the steps of:

[0026] Add the water-based epoxy curing agent into the reaction kettle, then add the alcohol ether solvent into the reaction kettle, stir at medium speed, mix and dilute evenly;

[0027] Add the water-based dispersant to the reactor for mixing;

[0028] Add graphene into the reaction kettle, stir and mix at high speed;

[0029] The mixed materials are ground by the grinder until the predetermined fineness, and then packed and discharged;

[0030] The raw materials in the above steps are proportioned according to the ingredients in the aforementioned graphene-modified water-based epoxy curing agent.

[0031] Wherein, the stirring and mixing speed of the water-based epoxy curing agent and the alcohol ether solvent is 1000-1500r / min, the stirring and mixing time is 0.2-0.5 hours, the mixing time o...

Embodiment 1

[0037] The preparation method of the graphene-modified water-based epoxy curing agent of the present embodiment may further comprise the steps:

[0038] The first stage: Add 40g of water-based epoxy curing agent into the reaction kettle, then add 25g of ethylene glycol butyl ether and 25g of propylene glycol methyl ether into the reaction kettle, stir at medium speed, mix and dilute evenly.

[0039] The second stage: Add 6.5g of water-based dispersant BYK-192 into the reaction kettle and mix evenly.

[0040] Three stages: Add 3.5g of graphene into the reaction kettle, stir and mix at high speed.

[0041] Four stages: The uniformly mixed material is ground by a grinder until the fineness is less than 20μm.

[0042] Five stages: After the fineness is checked, it is packaged and discharged.

[0043] Product performance data:

[0044] 1. Product appearance: black paste

[0045] 2. Graphene content: 3.5%

[0046] 3. Product solid content: 34%

[0047] 4. Active hydrogen equiv...

Embodiment 2

[0049] The preparation method of the graphene-modified water-based epoxy curing agent of the present embodiment may further comprise the steps:

[0050] The first stage: Add 45g of water-based epoxy curing agent into the reaction kettle, then add 25g of ethylene glycol butyl ether and 20g of propylene glycol methyl ether into the reaction kettle, stir at medium speed, mix and dilute evenly.

[0051]The second stage: Add 6.5g of water-based dispersant BYK-192 into the reaction kettle and mix evenly.

[0052] Three stages: Add 3.5g of graphene into the reaction kettle, stir and mix at high speed.

[0053] Four stages: The uniformly mixed material is ground by a grinder until the fineness is less than 20μm.

[0054] Five stages: After the fineness is checked, it is packaged and discharged.

[0055] Product performance data:

[0056] 1. Product appearance: black paste

[0057] 2. Graphene content: 3.5%

[0058] 3. Product solid content: 37.4%

[0059] 4. Active hydrogen equi...

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Abstract

The invention relates to a graphene-modified waterborne epoxy curing agent and a preparation method thereof. The graphene-modified waterborne epoxy curing agent comprises 40-50% of a waterborne epoxycuring agent, 1-3.5% of graphene, 5.7.5% of a waterborne dispersant, and 40-50% of an alcohol ether solvent. The preparation method of the curing agent herein comprises the steps of adding the waterborne epoxy curing agent into a reactor, adding the alcohol ether solvent into the reactor, mixing at a medium speed, and diluting uniformly; adding the waterborne dispersant into the reactor, and mixing; adding graphene into the reactor, and mixing at a high speed; grinding the mixed materials by a grinder until predetermined fineness is attained, packaging, and discharging. The graphene and the waterborne epoxy curing agent are mixed first, the mixture is dispersed in the alcohol ether solvent more evenly so that graphene is dispersed in an epoxy product efficiently with good stability, transporting and storing are convenient, preparation cost is low, preparation efficiency is high, and wide application of graphene is promoted.

Description

technical field [0001] The invention relates to the technical field of epoxy resins, in particular to a graphene-modified water-based epoxy curing agent and a preparation method thereof. Background technique [0002] Graphene is a carbon atom with sp 2 The honeycomb planar film formed by hybridization is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called single atomic layer graphite. Andre Geim and Konstantin Novoselov, physicists at the University of Manchester in the United Kingdom, successfully separated graphene from graphite by micromechanical exfoliation, so they jointly won the 2010 Nobel Prize in Physics. The common powder production methods of graphene are mechanical exfoliation method, redox method, and SiC epitaxial growth method, and the film production method is chemical vapor deposition (CVD). Due to its very good strength, flexibility, electrical conductivity, thermal conductivity, and optical properties, it has been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/44C08K3/04
CPCC08G59/44C08K3/042
Inventor 周海燕王冬冬
Owner 江苏道蓬科技有限公司
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