There are many ways to use matting agent, and different methods will produce different effects. Here are some simple ways to use it:
1. Powder coatings with different curing speeds were mixed by dry mixing method, and the gloss of the obtained coating film was obviously reduced, which played an extinction role. Because the powder coating with high reactivity cures quickly, it hinders the leveling and reaction of the resin with slow curing of continuous phase, and the finally cured coating loses its luster.
2. Add thermoplastic resin. Matt powder coating can be obtained by adding cellulose acetate to epoxy powder coating and adding fine powder low molecular weight polyethylene and polypropylene resin to polyester powder coating. The gloss of the coating film is affected by the production conditions. Due to the addition of thermoplastic resin, it will affect the storage stability of powder coatings and have extinction effect.
3. Add filler with extinction function. Adding fillers such as superfine silica and talcum powder can obviously reduce the gloss. Especially, the particle size of filler has a great influence on the gloss of coating film. The larger the particle size, the lower the gloss. It should be noted that increasing the amount of filler will reduce the flatness and mechanical strength of the coating.