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Graphene/waterborne epoxy zinc-rich coating with high corrosion resistance and strong adhesive force and preparation method of graphene/waterborne epoxy zinc-rich coating

A water-based epoxy zinc-rich, strong adhesion technology, applied in epoxy resin coatings, anti-corrosion coatings, coatings and other directions, can solve the problems of limited graphene application and limited compatibility, and achieve improved cathodic protection performance, excellent Corrosion resistance, good compatibility effect

Active Publication Date: 2021-02-19
广东豪之盛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high specific surface area of ​​graphene and the strong van der Waals force between its layers, it tends to agglomerate very easily.
In addition, graphene, as an inert material, has limited compatibility with waterborne organic resins, which greatly limits the application of graphene in waterborne organic zinc-rich coatings.

Method used

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  • Graphene/waterborne epoxy zinc-rich coating with high corrosion resistance and strong adhesive force and preparation method of graphene/waterborne epoxy zinc-rich coating
  • Graphene/waterborne epoxy zinc-rich coating with high corrosion resistance and strong adhesive force and preparation method of graphene/waterborne epoxy zinc-rich coating
  • Graphene/waterborne epoxy zinc-rich coating with high corrosion resistance and strong adhesive force and preparation method of graphene/waterborne epoxy zinc-rich coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) In terms of parts by mass, disperse 1 part of graphene oxide in 300 parts of deionized water, ultrasonically disperse for 1 h, adjust its pH to 8, then add 3 parts of polyethyleneimine with an n value of 50, and heat up to 60°C, stirring and reacting for 2 hours. After the reaction, use deionized water to filter, wash, and dry to obtain polyethyleneimine grafted reduced graphene oxide, which is hereinafter referred to as modified graphene.

[0033] (2) In terms of parts by mass, take 0.6 parts of modified graphene obtained in step (1) and disperse it into 5 parts of deionized water, add 30 parts of Hexion water-based epoxy resin 6520 and 0.3 parts of TEGO Twin 4100, 500 rev / min and stirred for 15 min to obtain component A of the coating.

[0034](3) In terms of parts by mass, 40 parts of zinc powder, 15 parts of ethylene glycol monobutyl ether and 10 parts of Hexion water-based epoxy resin curing agent 8538 are passed through 4000rev / min, stirred for 30min and mixe...

Embodiment 2

[0036] (1) In terms of parts by mass, disperse 1 part of graphene oxide in 500 parts of deionized water, ultrasonically disperse for 1 h, adjust its pH to 8, then add 3 parts of polyethyleneimine with an n value of 500, and heat up to 60 ° C, stirring the reaction for 2h. After the reaction, use deionized water to suction filter, wash, and dry to obtain polyethyleneimine grafted reduced graphene oxide, hereinafter referred to as modified graphene.

[0037] (2) In terms of parts by mass, take 0.6 parts of modified graphene obtained in step (1) and disperse it into 5 parts of deionized water, add 30 parts of water-based epoxy resin 6520 and 0.3 part of SURFYNOL 104E, stir at 800 rev / min for 15 min , to obtain component A of the coating.

[0038] (3) In terms of parts by mass, 40 parts of zinc powder, 15 parts of ethylene glycol monobutyl ether and 10 parts of water-based epoxy resin curing agent 6870 are passed through 6000 rev / min, stirred for 30 minutes and mixed uniformly, a...

Embodiment 3

[0040] (1) In terms of parts by mass, disperse 3 parts of graphene oxide in 800 parts of deionized water, ultrasonically disperse for 1 h, adjust its pH to 9, then add 8 parts of polyethyleneimine with an n value of 600, and heat up to 70 ° C, stirring the reaction for 4h. After the reaction, use deionized water to suction filter, wash, and dry to obtain polyethyleneimine grafted reduced graphene oxide, hereinafter referred to as modified graphene.

[0041] (2) In terms of parts by mass, disperse 1.5 parts of modified graphene obtained in step (1) into 25 parts of deionized water, add 75 parts of water-based epoxy resin 3540 and 0.3 part of TEGO Twin 4100, and stir at 500 rev / min After 15 minutes, component A of the coating was obtained.

[0042] (3) In terms of parts by mass, mix 60 parts of zinc powder, 25 parts of ethylene glycol monobutyl ether and 25 parts of water-based epoxy resin curing agent 8538. Stir at 6000rev / min for 30min and mix evenly as component B of the pa...

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Abstract

The invention discloses a graphene / waterborne epoxy zinc-rich coating with high corrosion resistance and strong adhesion. The graphene / waterborne epoxy zinc-rich coating is composed of a component A and a component B. The component A comprises the following components in parts by mass: 0.3-1.5 parts of modified graphene, 5-25 parts of deionized water, 20-75 parts of waterborne epoxy resin and 0.3-1 part of a substrate wetting agent, and the component B comprises the following components in parts by mass: 40-70 parts of zinc powder, 15-30 parts of ethylene glycol monobutyl ether and 10-25 partsof a waterborne epoxy resin curing agent. According to the graphene / waterborne epoxy zinc-rich coating with high corrosion resistance and high adhesive force, graphene oxide is used as a precursor, polyethyleneimine is adopted for graft reduction of graphene oxide, graphene oxide is uniformly inserted and combined into waterborne epoxy resin through stirring and shearing effects, and a uniform system is achieved; and further stirring is conducted with a waterborne epoxy resin curing agent component mixed with zinc powder and ethylene glycol monobutyl ether to obtain the anticorrosive paint with high corrosion resistance and strong adhesive force.

Description

technical field [0001] The invention relates to the technical field of cosmetics, in particular to a graphene / water-based epoxy zinc-rich coating with high corrosion resistance and strong adhesion and a preparation method thereof. Background technique [0002] Corrosion is a common problem of metal materials. It will not only cause huge resource consumption and aggravate environmental pollution, but also cause personnel safety problems due to structural damage, resulting in huge social and economic losses. Coating is one of the important means of steel corrosion protection. Different from conventional coatings, zinc-rich coatings can provide effective cathodic protection for steel substrates even with slight mechanical damage, so they are widely used in various heavy corrosion environments such as marine and industrial. Among them, water-based zinc-rich coatings have good development prospects because they do not emit toxic and harmful waste water and waste gas during the c...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/10C09D7/62
CPCC09D163/00C09D5/106C09D7/62C08K2003/0893C08K9/08C08K3/042C08K3/08
Inventor 朱春贵
Owner 广东豪之盛新材料有限公司
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