How does acrylic powder coating matte? With the rapid development of powder coatings, new products are emerging one after another. Pure poly outdoor powder coatings have excellent performance and are widely used, such as transportation vehicle parts, agricultural machinery parts, aluminum alloy doors and windows, street lamps Poles and more.
Because different products have different appearance requirements, a single high-gloss powder coating cannot meet this demand, so outdoor matt or even matt powder coatings appear.
Commonly used matting methods for pure polyester systems are filler matting, adding incompatible substances such as wax powder matting, two reaction speed powder mixing matting, adding matting agent matting, etc. Commonly used matting agents generally have catalysts Modified wax matting agent, polybasic acid + catalyst composite matting curing agent, composite catalyst + incompatible reactive polymer matting agent, these matting methods have their advantages, but these matting methods are difficult to achieve less than 10% , even 5% gloss, only epoxy acrylic resin matting can achieve <10% gloss and have good stability.
Acrylic is widely used in the paint industry, especially in water-based paints, because acrylic paint has excellent weather resistance, good anti-corrosion performance, and strong decorative performance.
But the market share of powder acrylic paint is very small. Epoxy vinyl acid matting powder coatings can achieve extreme effects below 10 degrees, and the gloss is stable, but this type of powder coatings has inherent disadvantages such as high price, poor mechanical properties, and it is difficult to scratch and wear on the reverse surface of 50cm Poor performance, the surface is prone to bright spots and flowers, which limits the expansion of its application range. The application of wax in powder coatings can achieve the effects of matting, gloss enhancement, hardening and anti-scratch, defoaming and degassing, smoothness and anti-caking.
The application of wax to powder coatings is to improve the surface properties of the coating film, mainly including improving the smoothness, scratch resistance and water resistance of the coating film. Later, it is used to affect the rheological properties of coatings, such as degassing, improving leveling and matting capabilities, and changing the surface state of coatings. Today, there is increasing interest in waxes with a multifunctional combination of properties. The effect of waxes on the curing system, and thus on the modification of the coating film, has also attracted great interest.
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