A powder coating with ultra-high weather resistance and matting effect

Abstract

The invention discloses a powder coating with ultra-high weather resistance and matting effect. Its raw materials include powder coating A component and powder coating B component which are dry-mixed as one and have different curing speeds, wherein the raw material of powder coating A component It includes the first polyester resin and a curing agent that can react with the first polyester resin; the raw materials of the B component of the powder coating include the second polyester resin and an acrylic resin containing epoxy groups, and the acrylic resin can be combined with the second The polyester resin undergoes a curing reaction; the powder coating A component and the powder coating B component are prepared by a dry mixing process to obtain a powder coating; the acid value range of the first polyester resin is not less than 15, and the acid value range of the second polyester resin Not less than 15; the present invention can simultaneously realize a coating film matting product with a gloss not higher than 10° by adopting a polyester curing system to dry-blend a polyester and an acrylic resin curing system, and also has a very excellent super weather resistance effect.

Description

technical field [0001] The invention belongs to the field of thermosetting powder coatings, and in particular relates to a powder coating with ultra-high weather resistance and matting effect. Background technique [0002] In recent years, the society has paid more and more attention to issues such as the environment, safety, and energy. In order to cooperate with the automotive industry in energy conservation and emission reduction, the development of environmentally friendly automotive coatings and the promotion of clean production of automotive coating processes have become the focus of automotive coating production and coating companies. . [0003] Specifically, the decorative parts of automobiles, especially the exterior parts of high-end automobiles, are basically painted with powder coatings at present. And with people's personalized pursuit of diversity in appearance, there is a demand for various gloss ranges for decorative parts in the market, including powder coa...

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Problems solved by technology

The invention also discloses the application of the polyester resin composition; however, the glossiness that can be achieved by the matting system using polyesters with different acid values ​​is usually in the range of 18-45°, and the glossiness cannot be realized due to the limitation of the system itself. Coated film matting products below 10 ゜

[0006] The applicant found that the existing powder coating products could not meet the dual requirements of at least 1500 hours of resistance to xenon lamp, its gloss retention rate should still be above 90%, and its glossiness range should be below 10 ゜. The subject focuses on research and development of this product

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