A kind of PVDF metal powder coating for metal surface and preparation method thereof

Abstract

The invention provides a PVDF metal powder coating for metal surfaces and a preparation method thereof. The thermoplastic acrylic resin and PVDF resin are ground by a refiner, and then mixed with a polymer and coated aluminum powder to prepare a powder coating. The synergy of the components Under the action of the powder coating, it can solve the problem of uneven spraying caused by the difference in chargeability between the components during the electrostatic spraying process; and a temperature control device is installed in the refiner to avoid excessive bonding of the powder during the grinding process, so that the grinding out The resin powder A and the resin powder B are microscopically irregular and fibrous, which greatly increases the probability of the two resin powders being entangled with each other in the reactor. In addition, the PVDF resin is used in the present invention to coat the aluminum powder and then add it to the reaction kettle, which can effectively solve the problem that the aluminum powder is oxidized or corroded when the powder coating is formed, and then obtain uniform bonding and excellent coating performance. Powder coating with high transparency and outstanding metallic effect.

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 usually sprayed by powder electrostatic guns, friction guns or fluidized bed dipping to make them adhere to the substrate, usually the surface of an alloy, and then form a coating film by heating or radiation curing, which has good decorative and protective effects. Conventional powder coatings can prolong the service life of the object to be coated under normal conditions, but many powder coatings in the prior art are easy to absorb water and form white spots on the surface, which affects the use and appearance of the powder coating performance. In addition, when using PVDF resin to prepare PVDF powder coatings, because PVDF resin is a thermoplastic resin with high toughness, it cannot be crushed at room temperature, resulting in high production costs...

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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