Super-weather-resistant metal powder and preparation method thereof

Abstract

The invention discloses super-weather-resistant metal powder comprising, by mass, 20 to 26 parts of modified barium sulfate, 25-38 parts of polyester, 80-100 parts of E42 epoxy resin, 22-27 parts of zinc powder, 24-30 parts of copper powder, 26-40 parts of polyethylene wax, 29-37 parts of silicon nitride powder, 26-31 parts of microcrystalline wax, 35-46 parts of titanium dioxide, 10-15 parts of light calcium carbonate, 5-15 parts of pigment and 3-8 parts of accelerant. The pigment is one or a mixture of cinnabar and red soil; the accelerant is specifically aluminum oxide C. According to the invention, polyester is added, such that excellent weather resistance is provided. By adding the light calcium carbonate and the silicon nitride powder, the steric hindrance and hydrolysis-resistant stable monomers of polyester macromolecules can be increased, the hydrophobic property of the polyester macromolecules is enhanced, and the wear resistance of the polyester macromolecules is improved bythe silicon nitride powder, so that the phenomena that the attractiveness of a product is reduced and the service life is shortened due to the fact that the surface of a coating is damaged after several times of friction are avoided to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to a super-weather-resistant metal powder; in particular, it also relates to a preparation method of the super-weather-resistant metal powder. Background technique [0002] Metal powder coatings refer to various powder coatings containing metal pigments. Powder coatings are solid powder synthetic resin coatings composed of solid resins, pigments, fillers and additives. Unlike ordinary solvent-based paints and water-based paints, its dispersion medium is not solvent and water, but air. It has the characteristics of no solvent pollution, 100% film formation and low energy consumption. There are two types of powder coatings, thermoplastic and thermosetting. Thermoplastic powder coatings have poor film appearance (gloss and leveling) and poor adhesion to metals, so they are rarely used in the field of automotive coatings. Thermosetting powder coatings are generally...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a super-weather-resistant metal powder and its preparation method to solve the problem that the existing metal powder coating has low hardness and the surface of the coating film will be destroyed after rubbing several times, resulting in a decrease in the aesthetics of the product. , the service life is reduced, and the weather resistance of existing metal powder coatings is not ideal

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