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Waterborne epoxy anticorrosive coating containing graphene and preparing method and application thereof

A technology of water-based epoxy and anti-corrosion coatings, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of shortened service life, reduced water resistance and anti-corrosion, difficult dispersion, etc., to reduce adverse effects and improve Dispersibility and the effect of reducing the amount of usage

Active Publication Date: 2017-11-17
湖南沃特邦恩新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of graphene itself, it is difficult to improve the compatibility when compounded with other materials, and it is also a big problem to disperse in coatings.
These technical difficulties limit the application and development of graphene in coatings
In addition, epoxy water-based needs to add emulsifiers or introduce hydrophilic segments, while the residue and migration of traditional emulsifiers affect the gloss and water resistance of products and cause environmental pollution, while some reactive emulsifiers or self-emulsifying epoxy emulsions Due to the introduction of hydrophilic chain segments, its water resistance and anti-corrosion properties are reduced, its service life is greatly shortened, and the application of water-based epoxy anti-corrosion paint is limited.

Method used

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  • Waterborne epoxy anticorrosive coating containing graphene and preparing method and application thereof
  • Waterborne epoxy anticorrosive coating containing graphene and preparing method and application thereof
  • Waterborne epoxy anticorrosive coating containing graphene and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In parts by weight, add 10 parts of 1% graphene oxide aqueous solution, 30 parts of ethanol and 0.02 parts of hydrazine hydrate and mix well, then add hydrochloric acid dropwise to the mixed solution to adjust the pH to 1, and add 8 parts of ethyl orthosilicate dropwise. Esters, after reacting at 40°C for 20h, aging at 80°C for 48h under hydrothermal conditions, after suction filtration, the filter residue was dried at 60°C for 10h, and the dried solid was burned at 500°C for 6h under the protection of an inert gas to obtain silica modified Thermally reduced graphene oxide (SiO2@RGO) composite;

[0036] In parts by weight, 80 parts of epoxy resin with an epoxy equivalent of 190, 5 parts of ethylene glycol monobutyl ether solution containing 10% SiO2@RGO, and 5 parts of nonionic active epoxy emulsifier were added to the reactor. Stir and mix evenly at 50-80°C, add water slowly, and turn on the high-speed shearer at a speed of 1500-2500rpm, the viscosity increases accordi...

Embodiment 2

[0039]In parts by weight, add 50 parts by mass fraction of 1% graphene oxide aqueous solution, 20 parts of ethanol, and 0.01 part of hydrazine hydrate and mix well, then add hydrochloric acid dropwise to the mixed solution to adjust the pH to 1.5, and add 9 parts of tetrabutyl silicate dropwise Esters, after reacting at 40°C for 25h, aging at 90°C for 36h under hydrothermal conditions, after suction filtration, the filter residue was dried at 80°C for 7h, and the dried solid was burned at 500°C for 7h under the protection of an inert gas to obtain silica modified Thermally reduced graphene oxide (SiO2@RGO) composite, the silica-modified graphene obtained by this preparation method has amphiphilic characteristics and can replace part of the epoxy emulsifier;

[0040] In parts by weight, 10 parts of epoxy resin with an epoxy equivalent of about 400, 20 parts of propylene glycol monomethyl ether solution containing 10% SiO2@RGO, and 5 parts of nonionic active epoxy emulsifier at 6...

Embodiment 3

[0043] In parts by weight, add 30 parts by mass fraction of 1% graphene oxide aqueous solution, 30 parts of ethanol, and 0.04 parts of hydrazine hydrate, mix well, add hydrochloric acid to the mixed solution to adjust the pH to 1, and add 10 parts of ethyl orthosilicate dropwise Esters, after reacting at 40°C for 20h, aging at 120°C for 24h under hydrothermal conditions, after suction filtration, the filter residue was dried at 100°C for 5h, and the dried solid was burned at 500°C for 10h under the protection of an inert gas to obtain silica-modified Thermally reduced graphene oxide (SiO2@RGO) composite, the silica-modified graphene obtained by this preparation method has amphiphilic characteristics and can replace part of the epoxy emulsifier;

[0044] In parts by weight, 80 parts of epoxy resin with an epoxy equivalent of 800, 20 parts of solid-containing 10% SiO2@RGO ethylene glycol monobutyl ether solution, and 5 parts of nonionic active epoxy emulsifier were added to the r...

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Abstract

The invention discloses a waterborne epoxy anticorrosive coating containing graphene and a preparing method and application thereof. The waterborne epoxy anticorrosive coating is prepared from, by weight, 5-30 parts of 1% oxidized graphene aqueous solution, 5-30 parts of ethyl alcohol, 0.01-0.04 part of hydrazine hydrate, 8-10 parts of silicon sources, 30-50 parts of filler, 33-35 parts of deionized water, 0.5-1 part of flash-rust resistance agent, 1-2 part of waterborne auxiliary, and 10-40 parts of waterborne epoxy hardener. The preparing method specifically comprises the following steps of S1, preparing graphene modified by silicon dioxide; S2, preparing waterborne epoxy emulsion modified by graphene; S3, preparing waterborne epoxy anticorrosive coating containing graphene. According to the waterborne epoxy anticorrosive coating containing graphene and the preparing method and application thereof, the compatibility of the waterborne epoxy anticorrosive coating in epoxy resin is improved, prepared graphene modified by silicon dioxide has the properties of an emulgator, and the epoxy emulsion can be emulsified and stabilized.

Description

technical field [0001] The invention relates to the technical field of chemical anticorrosion coatings, in particular to a graphene-containing water-based epoxy anticorrosion coating and a preparation method and application thereof. Background technique [0002] Epoxy resins contain active epoxy groups, which can undergo cross-linking reactions with various types of curing agents to form insoluble polymers with a three-dimensional network structure. The cured epoxy resin has good physical and chemical properties. It has excellent bonding strength to the surface of metal materials, high hardness, good flexibility, stable to acid, alkali and most solvents, and has excellent corrosion resistance. . Therefore, anti-corrosion coatings based on epoxy resin are widely used in various metal surface anti-corrosion treatment projects, such as petroleum industry, electric power industry, and infrastructure construction and other fields. However, due to the requirement of reducing vol...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D5/02C09D7/12
CPCC08K3/34C08K7/00C08K9/06C08K13/06C08K2003/2241C08K2003/2272C08K2003/3045C08K2003/321C08K2003/327C09D5/024C09D5/028C09D5/084C09D163/00
Inventor 刘军颜志红肖飞铭丁新良
Owner 湖南沃特邦恩新材料有限公司
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