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Graphene anti-corrosion paint

A technology of anti-corrosion coatings and graphene, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as low thermal stability and easy degradation, and achieve stable and uniform product quality, excellent corrosion resistance, and stable sex increasing effect

Active Publication Date: 2017-03-08
常州市大使涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of oxidation-modified graphene to prepare anti-corrosion coating, the present invention overcomes the oxygen-containing group on the surface of graphene oxide to make its thermal stability low, the shortcoming that heat is easily degraded, through oxidation modification The anti-corrosion coating prepared by the graphene has better acid and alkali anti-corrosion performance, stronger adhesion and hardness than ordinary anti-corrosion coatings.

Method used

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  • Graphene anti-corrosion paint

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Experimental program
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Effect test

Embodiment 1

[0031] Preparation of oxidatively modified graphene precursors:

[0032] 1) The temperature in the reaction kettle is controlled at -10°C, add 20L of 6N concentrated sulfuric acid, and start stirring;

[0033] 2) Add 5 kg of graphite flakes with a particle size of 400 mesh to the reaction kettle, so that the graphite flakes are all immersed in concentrated sulfuric acid, and stirred at -10°C for 60 minutes;

[0034] 3) The reaction kettle was heated to 5°C and stirred for 20 minutes;

[0035] 4) Stop the cooling cycle of the reaction kettle, add 2N sodium nitrate dropwise into the reaction kettle, and the reaction will exotherm; control the temperature in the reaction kettle to 5-10°C through the dropping speed, and react at 10°C for 2h after the dropwise addition;

[0036] 5) Add 6L of 3N potassium permanganate solution dropwise to the reactor, use a peristaltic pump to control the dropping rate, and control different dropping rates in three stages; the dropping rate in the ...

Embodiment 2

[0048] Weight ratio: 80 parts of DER671 Dow solid epoxy resin; 23 parts of 582 type melamine formaldehyde resin; 27 parts of steralnium chloride hectorite; 7 parts of hydroxypropene borate pinacid; 0.6 parts of oxidized modified graphite ene precursor; 2 parts of γ-aminopropyltriethoxysilane; 6 parts of nano-sized titanium dioxide; 4 parts of Y-311SN blocked isocyanate curing agent; 13 parts of calcined kaolin; 3 parts of zinc chromate; 34 parts of solvent; 0.3 part paraformaldehyde.

[0049] The preparation method of the oxidatively modified graphene precursor and the anti-corrosion coating in embodiment 2 are the same as the preparation method in embodiment 1.

Embodiment 3

[0051] Weight ratio: Weigh 87 parts by weight of DER671 Dow solid epoxy resin; 25 parts of 582 type melamine formaldehyde resin; 28 parts of steralnium chloride hectorite; Modified graphene precursor; 3 parts of γ-aminopropyltriethoxysilane; 7 parts of nanoscale titanium dioxide; 5 parts of Y-311SN type blocked isocyanate curing agent; 15 parts of calcined kaolin; 3 parts of zinc chromate; 35 parts part solvent; 0.4 part paraformaldehyde.

[0052] The preparation method of the oxidatively modified graphene precursor and the anti-corrosion coating in embodiment 3 are the same as the preparation method in embodiment 1.

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Abstract

The invention discloses a graphene anti-corrosion paint. The paint comprises, by weight, 76-87 parts of DER671 type Dow solid epoxy resin, 22-25 parts of 582 type melamine formaldehyde resin, 27-28 parts of stearalkonium hectorite, 6-7 parts of hydroxy-1-propenylboronic acid pinacol ester, 0.5-0.7 part of oxidative modified graphene precursor, 1-3 parts of gamma-amino propyl triethoxy silane, 5-7 parts of nanoscale titanium dioxide, 3-5 parts of Y-311SN type blocked isocyanate curing agent, 12-15 parts of calcined kaolin, 2-3 parts of zinc chromate, 32-35 parts of solvent, and 0.2-0.4 part of paraformaldehyde. The method uses the second time oxidative modification of the graphene to increase the graphene stability, thus benefiting the maximum exertion of the inherent anti-corrosion performance of the graphene, making the prepared paint have excellent adhesive force, hardness, anti-wear ability and resistance to the corrosion caused by neutral salt mist.

Description

technical field [0001] The invention belongs to the technical field of metal anticorrosion, and in particular relates to a graphene anticorrosion coating and a preparation method thereof. Background technique [0002] At present, more anti-corrosion coatings are used, such as organic zinc-rich coatings, and epoxy resins, chlorinated rubbers, vinyl resins and polyurethane resins are commonly used as film-forming base materials. The most commonly used is epoxy zinc-rich paint, among which polyamide cured epoxy zinc-rich primer is the most widely used variety in organic zinc-rich primer. The anti-rust performance of the organic type coating is slightly worse than that of the inorganic type, and the electrical conductivity, heat resistance, and solvent resistance are not as good as the inorganic type. [0003] Graphene is a hexagonal honeycomb two-dimensional nanomaterial composed of a single layer of carbon atoms. Its special two-dimensional structure makes it have excellent p...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D161/28C09D5/08C09D7/12
CPCC08K2201/011C08L2201/08C08L2205/035C09D5/08C09D7/62C09D163/00C08L61/28C08K13/06C08K9/02C08K3/04C08K2003/2241C08K3/346
Inventor 戴仁兴
Owner 常州市大使涂料有限公司
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