How to choose pigments for powder coatings

In powder coating design, the primary role of pigments is coloring and covering. The addition of pigments is an important part of powder coating production. In powder coating design, the selection of pigments should consider the following issues. Pigment manufacturers

1. Because the baking curing temperature of powder coatings is high, the heat resistance of powder coatings is better. Under the conditions of baking curing temperature and time, the hue of pigments is stable, and the heat resistance temperature of pigments should be higher than that of powder coatings. Spend.

2. Most varieties of powder coatings are used in decorative aspects. Whether used indoors or not, the product always comes in contact with light. The aging effect of light on the pigment is very serious, of course, the sunlight damage is stronger, so the light fastness of the pigment is required to be better.

3. In powder coatings, the pigments of pure white powder coatings are mainly titanium, and a small amount of colored pigments are matched. The amount of titanium in the powder is 20-30% of the total weight. It is mainly based on the requirements for the appearance of coatings and coatings. In addition, it is related to factors such as the whiteness, hiding power and tinting strength of titanium itself.