Environmentally-friendly high-permeability modified epoxy rusty coating

Abstract

The invention provides an environmentally-friendly high-permeability modified epoxy rusty coating, and belongs to the technical field of coatings. The coating is composed of a component A and a component B, the component A comprises at least one of a glycidyl ether compound and a mixture of an aldehyde compound and a ketone compound, at least one of a rust stabilizer and a rust conversion agent, epoxy resin, an interface agent and an antirust filler, and the component B comprises an amine curing agent, a curing accelerator and a moisture-consuming functional curing agent. The aldehyde compound, the ketone compound and the glycidyl ether compound enable the coating to have excellent permeability, and also can participate in system reactions under the action of the amine curing agent, so that the problem of environmental pollution caused by VOCs generated in the film forming process is greatly reduced, and the flexibility and the adhesive property of the coating are improved; and the moisture-consuming functional curing agent can consume moisture in a rust layer, so it is ensured that the rust layer is not rusted any more, and the curing of the epoxy resin is also ensured.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to a modified epoxy coating, in particular to an environment-friendly high-permeability modified epoxy coating with rust. Background technique [0002] When the traditional anti-rust coating is applied on the surface of steel, it is required to completely remove the rust, which not only consumes a lot of manpower and working hours, but also greatly increases the construction cost, and often the rust cannot be completely removed. The rusty paint can be directly painted under the situation of incomplete rust removal or only need to remove shallow floating rust, and can achieve the effect of preventing further corrosion of steel. [0003] From the point of view of mechanism, rust coatings mainly include stable and conversion rust coatings. Its characteristics are that the paint itself penetrates into the rust layer, fully contacts and infiltrates with the rust layer structure and completely wrap...

AI Technical Summary

Problems solved by technology

[0007] At present, in order to ensure its permeability, commonly used solvent-based antirust coatings usually use a large amount of non-reactive diluents. The non-reactive diluents volatilize during the curing process of the coating to form a film, which will be difficult during construction and coating. A large amount of VOC is produced during the curing process of the layer, causing serious environmental pollution, personnel health damage and flammable and explosive construction safety hazards

In addition, if the inactive diluent remains in the coating film, it will reduce the adhesion performance, mechanical properties and antirust function of the uncorroded steel part of the coating film

In addition, the moisture in the rust layer and in the air is not only the root cause of steel corrosion, but also affects the curing reaction of epoxy resin materials, resulting in incomplete or non-curing of the final paint film, thus reducing the paint film. Adhesion, mechanical properties and anti-corrosion properties of films

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