Low surface treatment epoxy resin paint and preparation method thereof

Abstract

The invention discloses an epoxy resin paint with low surface treatment, which comprises the following components and parts by weight: Component A: 20-35 epoxy resin, 1-2 dispersant, 1-3 anti-settling agent, 5 titanium dioxide ~10, talcum powder 15~25, zinc phosphate 3~8, aluminum tripolyphosphate 5~15, benzyl alcohol 3~10, defoamer 0.3~1, xylene 5~15; B component: modified amine curing Agent 60~75, accelerator 2~5, mixed solvent 25~40; the mass ratio of A component to B component is 5:1. The curing agent of the present invention is modified by hydrogenated petroleum resin to improve the wettability and permeability of the curing agent, which can drive the liquid paint material to penetrate into the porous rust layer, and form a paint film after curing reaction to tightly wrap the rust layer to prevent further development of rust. The modified curing agent introduces a flexible segment, which improves the flexibility and adhesion of the film-forming material. At the same time, it enhances the tolerance to moisture and improves the corrosion resistance of the paint film.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coatings, and in particular relates to a low surface treatment epoxy resin paint. Background technique [0002] In modern industrial production and life, among various methods to prevent steel from corroding and rusting, coating anticorrosion technology is still the most economical, effective and widely used method. In the past, when coating and anti-corrosion metal surfaces, strict pre-treatment, such as sandblasting, must be carried out on the metal surface first, in order to obtain a better anti-corrosion effect. However, the sandblasting process is expensive and pollutes a lot. Therefore, people have developed low surface treatment coatings, that is, using manual or power tools to polish the metal surface, and it can be applied to the surface when the rust is not completely removed or cannot reach Sa2 level or above, or in a humid environment. Metal surface, and has good adhesion and anti-corros...

AI Technical Summary

Problems solved by technology

However, the sandblasting process is expensive and pollutes a lot. Therefore, people have developed low surface treatment coatings, that is, using manual or power tools to polish the metal surface, and it can be applied to the surface when the rust is not completely removed or cannot reach Sa2 level or above, or in a humid environment. Metal surfaces, coatings with good adhesion and anti-corrosion properties

At present, there are similar products at home and abroad, such as low surface treatment epoxy paints containing tannic acid rust conversion agent, or ketimine modified curing agent or cardanol phenolic phenalkamine, but there are deficiencies in all of them. The rust conversion type is difficult to control the reasonable matching of acid and rust, and it is easy to cause insufficient rust conversion or excessive acid to cause steel corrosion; ketimine curing agent is a moisture-curing paint, and moisture is easy to first react on the paint film surface to form a closed surface. Insufficient internal curing of the paint film; phenalkamine-cured paint films usually have excess rigidity and insufficient toughness

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