The role of synthetic wax in powder coatings. During the film-forming process of powder coatings, when the coating film cools, polyolefin wax precipitates out of the coating solution, forms fine particles, and floats on the surface of the coating film to play a role in texture and matting. , slippery, anti-abrasion and scratch applications; appropriate selection of micronized wax and coating system can obtain various patterns.
Synthetic wax is generally used in an amount of 1-3%, which is generally added before extrusion; it can be added before and after extrusion, and the amount added after the addition is less than 1% to achieve excellent results.
1. Low molecular weight polyethylene homopolymer wax with good matting effect and comprehensive performance.
2. The amide-modified wax increases the incompatibility and disorder of the coating components. In the hot-melt state, the viscosity and surface tension of the system drop sharply, and the wax base migrates to the coating surface. The result is that a dense coating film is formed on the surface of the cured coating, resulting in loss of gloss. Suitable for all but epoxy powder coatings.
3. Polytetrafluoroethylene modified polyolefin wax has good friction resistance, high scratch resistance, smoothness and texture.
The wax powder contains polytetrafluorowax, because it cannot be melted, it protrudes on the surface as a single particle, which becomes the first line of defense against abrasion, thereby prolonging the wear-resistant time, and when the coating film cools, the polytetrafluoroethylene Olefin wax precipitates from the coating solution, forms fine particles, floats on the surface of the coating film, plays a smooth and anti-scratch role, and becomes the second line of defense against wear. The best combination, both have the advantages of the two wax powders, and the hardening effect is the best.
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