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Aqueous graphene heavy-anticorrosive coating and preparation method thereof

A water-based graphene, heavy-duty anti-corrosion technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve problems such as difficulty in application, achieve low volatile organic content, high corrosion resistance, and solve layered sedimentation bottom effect

Inactive Publication Date: 2019-03-26
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional heavy-duty anti-corrosion coating system is mostly based on zinc-rich primer, which is shielded and connected between layers by coating epoxy mica iron intermediate paint, and at the same time, it is finished with acrylic polyurethane or fluorocarbon paint, so that it has better corrosion resistance. Electrochemical protection and weather resistance performance are mostly between 5 and 10 years, which can basically meet the general heavy-duty anti-corrosion requirements, but it is difficult to apply to extreme environments such as high temperature and high humidity, high salt spray, and high ultraviolet radiation.

Method used

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  • Aqueous graphene heavy-anticorrosive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Water-based graphene slurry

[0026] a. Add 80 parts of water-based resin, 1 part of functional dispersant, 10 parts of modified graphene with a sheet thickness of 50nm, and 10 parts of coagent into the dispersing machine in order to disperse at high speed for 20 minutes to obtain a dispersion;

[0027] b. Grind the above-mentioned dispersion to a fineness of less than 30 μm by shaking, sand milling, etc., and control the temperature below 50°C to obtain a water-based graphene prefabricated slurry;

[0028] (2) A component

[0029] a. Add 15 parts of the water-based graphene slurry obtained in step (1) to 20 parts of water-based epoxy resin, and disperse at a high speed for 10 minutes at 2000 rpm to obtain a resin dispersion;

[0030] b. Add 0.2 parts of TEGO822, 0.2 parts of 299, 0.4 parts of BYK-349, 0.2 parts of anti-flash rust agent and 15 parts of deionized water into the resin dispersion prepared in step b, stir well and slowly add 50 parts of improved zinc p...

Embodiment 2

[0035] (1) Water-based graphene slurry

[0036] a. Add 60 parts of water-based resin, 0.2 parts of functional dispersant, 10 parts of modified graphene with a sheet thickness of 50nm, and 5 parts of coagent into the disperser in order to disperse at high speed for 10 minutes to obtain a dispersion;

[0037] b. Grind the above-mentioned dispersion to a fineness of less than 30 μm by shaking, sand milling, etc., and control the temperature below 50°C to obtain a water-based graphene prefabricated slurry;

[0038] (2) A component

[0039] a. Add 5 parts of the water-based graphene slurry obtained in step (1) to 10 parts of water-based epoxy resin, and disperse at a high speed for 20 minutes at 1000 rpm to obtain a resin dispersion;

[0040] b. Add 0.3 parts of TEGO822, 0.2 parts of 299, 0.2 parts of BYK-349, 0.3 parts of anti-flash rust agent and 10 parts of deionized water into the resin dispersion prepared in step b, stir well and slowly add 55 parts of improved zinc powder ,...

Embodiment 3

[0045] (1) Water-based graphene slurry

[0046] a. Add 70 parts of water-based resin, 1 part of functional dispersant, 8 parts of modified graphene with a sheet thickness of 20nm, and 7 parts of coagent into the disperser in order to disperse at high speed for 15 minutes to obtain a dispersion;

[0047] b. Grind the above-mentioned dispersion to a fineness of less than 30 μm by shaking, sand milling, etc., and control the temperature below 50°C to obtain a water-based graphene prefabricated slurry;

[0048] (2) A component

[0049] a. Add 10 parts of the water-based graphene slurry obtained in step (1) into 15 parts of water-based epoxy resin, and disperse at a high speed for 15 minutes at 1500 rpm to obtain a resin dispersion;

[0050] b. Add 0.2 parts of TEGO822, 0.3 parts of 299, 0.3 parts of BYK-349, 0.2 parts of anti-flash rust agent and 13 parts of deionized water into the resin dispersion prepared in step b, stir well and slowly add 57 parts of improved zinc powder , ...

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Abstract

The invention relates to an aqueous graphene heavy-anticorrosive coating. The coating comprises two components of A and B, wherein the component A is composed of the following substances in part by mass: 10-20 parts of the aqueous resin, 50-60 parts of anti-rust filler, 5-15 parts of aqueous graphene slurry, 0.5-1 part of functional auxiliary agent and 10-15 parts of deionized water; the componentB is a modified amine curing agent. The aqueous graphene heavy anticorrosive coating is an environment-friendly product and has the advantages of high adhesion, neutral salt spray resistance of up to3000 hr, no cracking, no foaming, room-temperature curing, high crosslink density and simple construction. In addition, the invention simultaneously provides aqueous graphene slurry and a preparationmethod of the aqueous graphene heavy-anticorrosive coating.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a water-based graphene heavy-duty anti-corrosion coating and a preparation method thereof, belonging to the field of high-performance anti-corrosion coating materials. Background technique [0002] Graphene is a nano-sheet material with a loose structure. Due to the high surface energy, the particles are mostly aggregated and difficult to disperse evenly, which limits the performance of graphene to a large extent. How to promote the uniform dispersion and stable storage of graphene sheets in the system is the key to obtaining high-performance graphene heavy-duty anti-corrosion coatings. [0003] The traditional heavy-duty anti-corrosion coating system is mostly based on zinc-rich primer, which is shielded and connected between layers by coating epoxy mica iron intermediate paint, and at the same time, it is finished with acrylic polyurethane or fluorocarbon paint, so that it has bette...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08
CPCC09D5/08C09D163/00C08K3/042
Inventor 杨艺聪张刚李著初李学超文风
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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