A metal coating for heat-reflecting high-corrosion-resistant and weather-resistant steel sheet coils and its preparation method

Abstract

The invention discloses a heat-reflective, highly corrosion-resistant and weather-resistant steel coil metal coating and a preparation method thereof, which is prepared from the following raw materials in parts by weight: 55-65 parts of epoxy-acrylic resin, 10 parts of organic silicon modified epoxy resin ~14 parts, polyvinylidene fluoride resin 30~40 parts, soybean oil short oil alkyd resin 8~12 parts, ethylene-methyl acrylate copolymer 4~6 parts, polypyrrole coated zinc powder 6~8 parts, 3-4 parts of graphene, 3-4 parts of titanium dioxide, 70-90 parts of organic solvent, 1-2 parts of ultraviolet absorber, and 1-1.6 parts of alignment agent. The heat-reflecting high-corrosion-resistant and weather-resistant steel coil metal coating of the present invention takes into account heat reflection performance, high corrosion resistance and weather resistance performance, and does not need to be galvanized before painting, and does not need traditional primers, and can be directly painted. The invented heat-reflective, highly corrosion-resistant and weather-resistant steel coil metal coating makes the manufacturing process simple and greatly reduces the cost of the steel coil.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a metal coating for heat-reflecting high-corrosion-resistant and weather-resistant steel sheet coils and a preparation method thereof. Background technique [0002] With the vigorous development of my country's construction industry, the demand for building materials is increasing year by year. Steel sheet coils are widely used as construction materials such as exterior walls and roofs. Generally, in order to improve the performance of the steel sheet coil, galvanizing treatment is performed on its surface to increase the galvanized layer, thereby endowing the steel sheet coil with excellent corrosion resistance, but the cost is high and the process is complicated. [0003] Coating weather-resistant paint on the surface of the galvanized layer can effectively improve the weather resistance of the galvanized steel sheet. At present, the coatings with high weather resistance and...

AI Technical Summary

Problems solved by technology

[0005] 1. It is impossible to take into account the heat reflection performance, high corrosion resistance and weather resistance performance. It needs to be galvanized first and then painted, which is costly and complicated;

[0006] 2. Modified polyvinylidene fluoride (PVDF) coatings are difficult to achieve good compatibility, and the curing effect is not ideal, resulting in a large number of defects or defects in the paint film, which are easy to fall off, and usually require the use of traditional primers

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