Acid-resisting epoxy resin waterborne anticorrosive coating and preparation method thereof

Abstract

The invention relates to acid-resisting epoxy resin waterborne anticorrosive coating and belongs to the field of application of graphene materials. The coating is prepared by mixing a component A anda component B, wherein the component A is an epoxy resin base material and is prepared from epoxy resin, an emulsifier, water, disperse medium water, an auxiliary agent and graphene pigment and filleraccording to the mass ratio of (100 to 200) to (5 to 10) to (50 to 100) to (100 to 150) to (1 to 3.0) to (100 to 250); the component B is a waterborne phenolic aldehyde amine type curing agent; a graphene component is added into the coating, so that the acid resisting performance of the epoxy resin waterborne anticorrosive coating is greatly improved; the acid-resisting epoxy resin waterborne anticorrosive coating is also environmentally friendly and has no injuries to constructors.

Description

technical field [0001] The invention relates to the application field of graphene materials, in particular to an acid-resistant epoxy resin water-based anticorrosion coating containing graphene components and a preparation method thereof. Background technique [0002] It is well known that the economic loss caused by corrosion in China accounts for about 3-5% of GDP each year. At present, in order to reduce the economic loss caused by corrosion, the most commonly used method is to coat a layer of anti-corrosion coating on the surface of the material, that is, to use anti-corrosion The coating layer isolates the material from corrosive media such as water and oxygen, so as to achieve anti-corrosion effects; the existing anti-corrosion coatings usually use polymers, such as epoxy resins, as the main film-forming substances, and their coating systems are generally based on primers, medium It is used in conjunction with the topcoat; and the coating base currently used - the prim...

AI Technical Summary

Problems solved by technology

[0002] It is well known that the economic loss caused by corrosion in China accounts for about 3-5% of GDP each year. At present, in order to reduce the economic loss caused by corrosion, the most commonly used method is to coat a layer of anti-corrosion coating on the surface of the material, that is, to use anti-corrosion The coating layer isolates the material from corrosive media such as water and oxygen, so as to achieve anti-corrosion effects; the existing anti-corrosion coatings usually use polymers, such as epoxy resins, as the main film-forming substances, and their coating systems are generally based on primers, medium It is used in conjunction with the topcoat; and the coating base currently used - the primer, which must have good wettability and adhesion to the surface of the material, as well as strong shielding and acid and alkali resistance; However, due to the good adhesion between the epoxy resin and the material, there are many types of curing agents, the volume shrinkage after curing is only 2%, and after curing, it can form a epoxy resin with good water resistance, acid and alkali resistance and oil resistance. Three-dimensional network structure, therefore, epoxy resin coating is one of the coatings that are widely used in the field of anticorrosion; Commonly used methods include: mechanical method, chemical modification method and emulsifier method, etc., and these commonly used methods can only form an emulsion after water-based epoxy resin, but its stability, hydrophilicity and environmental protection The size of the epoxy resin in the emulsion cannot fully meet the relevant requirements;

[0003] In addition, with the improvement of environmental protection awareness around the world, the efforts to control environmental pollution have gradually increased, and the pollution of traditional oil-based paint solvents has also attracted public attention, while water-based paint uses water as a dispersion carrier. Environmentally friendly, compared with oil-based paints, its advantages are obvious, so water-based paints are more and more popular with the public; among them: because epoxy resin water-based paints are non-polluting, and have no effect on the surface of materials such as steel, ceramics, wood, etc. There is a better bonding effect, so the adhesion is stronger, so epoxy resin water-based coatings are widely used in anti-corrosion coatings; however, when the existing epoxy resin water-based coatings are used as acid-resistant anti-corrosion coatings, they comply with industry standards HG / T4759 stipulates the acid resistance index, that is, the acid resistance index is only 5%H 2 SO 4 It can be seen from these indicators that the performance of existing epoxy resin water-based coatings is far lower than the required indicators of water resistance, alkali resistance, and salt spray resistance, which also makes epoxy resin water-based coatings in practice Therefore, how to improve the anti-acid performance of water-based epoxy resin-based anti-corrosion coatings is of great significance, and it has also become a subject that needs to be overcome in the field of water-based anti-corrosion coatings.