Graphene modified waterborne epoxy resin coating material as well as preparation method and application thereof

Abstract

The invention discloses a graphene modified waterborne epoxy resin coating material as well as a preparation method and application thereof. The graphene modified waterborne epoxy resin coating material is prepared from a component A' of which the solid content is 53 percent and a component B of which the solid content is 40 percent. The graphene modified waterborne epoxy resin coating material ofwhich the solid content is 33 percent is obtained by mixing the component A' with the component B according to a mass ratio of (1.5 to 4):1, adding deionized water, and uniformly mixing, wherein thecomponent A' is graphene modified waterborne epoxy resin emulsion and is obtained by adding 0.1 to 1 mass percent of graphene derivative in waterborne epoxy resin emulsion. The component A' is stablystored for a long term and has no precipitate after one-year storage. The obtained graphene modified waterborne epoxy resin coating material after the component A is applied is higher in corrosion resistance, conductivity and thermal stability, and the preparation method is safe and environmentally friendly, does not use heavy metal ions and volatile organic solvents and accords with the idea of environment-friendly protection.

Description

technical field [0001] The invention specifically relates to a graphene-modified water-based epoxy resin coating and a preparation method and application thereof, belonging to the technical field of chemical industry. Background technique [0002] Traditional solvent-based anti-corrosion coatings contain a large amount of volatile organic compounds (VOC), most of which are flammable, explosive, toxic substances and carcinogens, and long-term inhalation of people can cause neurological diseases. As the use of solvent-based anti-corrosion coatings is gradually restricted, water-based coatings have become a more environmentally friendly surface corrosion protection method for metal substrates in production practice. Water-based anti-corrosion coatings use water as a solvent and diluent, not only non-toxic and tasteless, but also cheap and safe to use, without the danger of fire and explosion. Water-based epoxy resin coatings have good corrosion resistance, can be applied at ro...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a graphene-modified water-based epoxy resin coating in order to solve technical problems such as the dispersion instability of graphene or graphene oxide in water-based epoxy emulsion and the demulsification of water-based epoxy resin emulsion , the graphene-modified water-based epoxy resin coating, because graphene derivatives are added to the water-based epoxy resin emulsion (A component), and then added according to the A and B components in the two-component water-based epoxy coating Compared with mixing, the obtained graphene-modified water-based epoxy resin emulsion has greatly improved corrosion resistance, electrical conductivity and thermal stability.

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