A self-drying epoxy coating and its preparation method and application method

Abstract

The invention relates to the field of paint, in particular to self drying type epoxy paint as well as a preparation method and a use method thereof. The paint solves the problem of poor adhesion forceof conventional paint on the metal surface. The paint is characterized in that the paint is prepared from paint A and paint B, wherein the paint A and the paint B are used through being mixed; the paint A is prepared from the following ingredients in parts by mass: 20 to 30 parts of epoxy resin with the epoxy value being 0.19 to 0.21mol / g, 0 to 10 parts of epoxy resin with the epoxy value being 0.4 to 0.5mol / g, 0 to 1 part of organic silicon coupling agents, 10 to 30 parts of titanium dioxide, 5 to 10 parts of mica powder and 15 to 25 parts of solvents; the paint B is prepared from the following ingredients in parts by mass: 10 to 20 parts of modified amide resin and 5 to 12 parts of solvents. Before the spray coating, the pretreatment such as anodization, phosphorization and passivationon the metal is not needed; the use is convenient. According to different metal types, the mixture ratio of the paint A and the paint B is flexibly regulated, so that the paint can maintain the good adhesion force when facing different metal; the use is flexible.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a self-drying epoxy coating and a preparation method and application method thereof. Background technique [0002] Epoxy coatings are usually used as anti-rust primers on metal surfaces, and can also be used as surface anti-rust coatings for bridges, ships, offshore platforms, underwater coatings, harbor facilities, and automobile chassis, as well as chemical anti-corrosion coatings and coal mine facilities. anti-corrosion coating etc. [0003] When applied to the coating of aluminum, aluminum alloy, and hot-dip galvanized surfaces, the metal properties of aluminum, aluminum alloy, and hot-dip galvanized surfaces are relatively active, and are easily oxidized into aluminum oxide and zinc oxide under the conditions of moisture and oxygen in the air and other chemicals. Aluminum oxide and zinc oxide have certain chemical inertness, which can slow down the corrosion of metal substrates in ...

AI Technical Summary

Problems solved by technology

[0004] Due to the relatively active chemical properties of aluminum and zinc, the chemical properties of aluminum oxide and zinc oxide are stable, and there may be elements such as silicon and magnesium in the metal, the complex structure of the metal surface makes the traditional self-drying epoxy coating difficult for these metal surfaces poor adhesion

At the same time, due to the soft texture of aluminum and zinc, the expansion coefficient of the epoxy coating is quite different from that of the epoxy coating. With the fatigue damage of the metal, it is easy to cause displacement or even fall off when applied to the metal surface, losing its protective effect.

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