PVDF metal powder coating for metal surface, and preparation method thereof

Abstract

The invention provides a PVDF metal powder coating for a metal surface, and a preparation method thereof. Thermoplastic acrylic resin and PVDF resin are ground through a pulping machine, and then aremixed with macromolecules and coated aluminum powder to prepare the powder coating, and the problem that in the electrostatic spraying process of the powder coating, spraying is not uniform due to theelectrification difference between the components is solved under the synergistic effect of the components; and a temperature control device is arranged in the pulping machine, so that excessive bonding in the powder grinding process is avoided, ground resin powder A and resin powder B are microscopically in an irregular fibrous shape, and the probability of mutual entanglement of the two resin powders in a reaction kettle is greatly increased. Besides, the PVDF resin is used for coating aluminum powder, and then the coated aluminum powder is added into the reaction kettle, so that the problem that the aluminum powder is oxidized or corroded when the powder coating forms a coating layer can be effectively solved, and the powder coating which is uniform in bonding, high in coating layer transparency and remarkable in metal effect is further obtained.

Description

Technical field [0001] The invention relates to the field of powder coatings, in particular to a PVDF metal powder coating for metal surfaces and a preparation method thereof. Background technique [0002] Powder coatings are generally adhered to the substrate by powder electrostatic gun, friction gun spraying or fluidized bed dip coating, usually on the surface of the alloy, and then cured by heating or radiation to form a coating film, which has a good decorative and protective effect. Conventional powder coatings can prolong the service life of the coating under normal conditions, but many powder coatings in the prior art can easily absorb water to form white spots on the surface, which affects the use and appearance of powder coatings. performance. In addition, when PVDF resin is used to prepare PVDF powder coatings, because PVDF resin is a thermoplastic resin, it has high toughness and cannot be pulverized at room temperature, resulting in high production costs and prone to...

AI Technical Summary

Problems solved by technology

[0004] On the whole, in the field of preparing powder coatings, especially in the field of preparing PVDF metal powder coatings, there are still many practical problems to be dealt with in practical applications that have not yet proposed specific solutions.

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