Modified epoxy coating and preparation method and application thereof

Abstract

The invention discloses a modified epoxy coating as well as a preparation method and application thereof, wherein the modified epoxy coating is prepared from a modified base material, an antirust pigment, a diluent and an auxiliary agent, wherein the modified base material is prepared from 15-35 parts of modified epoxy resin and 5-20 parts of a modified amine curing agent; the antirust pigment isone or more of micaceous iron ash, zinc phosphate, aluminum triphosphate and ferrophosphorus powder, and the quantity of the antirust pigment is 15-40 parts; the use amount of the diluent is 3-10 parts; the auxiliary agent is one or more of a dispersing agent, an anti-settling agent and a defoaming agent, and the use amount of the auxiliary agent is 3-15 parts. The modified epoxy paint is single-component intermediate paint, is convenient to use, can be used for carrying out anticorrosive treatment on special-shaped workpieces in a dip-coating mode, can also be used in a spraying mode, can coexist all the components at the same time at the normal temperature, and is long in quality guarantee period, and the corrosion resistance of a steel structure is improved through matched use of the intermediate paint and priming paint.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a one-component flake type mica-iron modified epoxy coating and a preparation method and application method thereof. Background technique [0002] It is recommended to use a combination of primer, intermediate paint and top coat for many paint packages. The intermediate paint is usually epoxy mica iron intermediate paint. The functions of the intermediate paint are as follows: (1) Increase the thickness of the paint film: it can improve the paint coating (2) Good economy: the use of primers, intermediate paints, and topcoats with the same service life is more economical than simply using primers and topcoats, that is, the cost is lower (3) Use as a connecting paint: improve the adhesion and link strength between the primer and the top coat; (4) Improve the surface decoration: use the intermediate paint to make the surface paint film more plump, bright and smooth; (5)...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of existing epoxy miracic iron intermediate paints on the market: (1) Both are two-component coatings. After the two components are mixed, the service life is generally 8 hours, and they cannot be used after 8 hours; (2) The xylene and acetic acid used Butyl ester, etc. are solvents, which are harmful to the environment and employees; (3) The coating method is generally roller coating and spraying, and there are many inner corners or the coating inside the pipe fittings has leakage or leakage, which affects the anti-corrosion life; (4) The intermediate paint undertakes the connecting function of the primer and the top coat. The adhesion of ordinary intermediate paint is poor, which may cause the surface layer to fall off and affect the anti-corrosion ability; (5) The flash point of the paint is low (generally at 30°C), which is easy Flammable and explosive

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