Powder paint powder selection of coloring pigments, metal pigments, functional pigments, physical pigments, fillers...
The better paints are usually foreign.
1, because the baking curing temperature of powder coating powder is high, the heat resistance of powder coating powder is better. Under the conditions of baking curing temperature and time, the color of pigment is stable, and the heat resistance temperature of pigment should be higher than the baking curing degree of powder coating powder.
2, most varieties of powder coating powder is used in decorative aspects.
Whether used indoors or outdoors, the product should always be in contact with light.
The aging effect of light on pigments is very serious, of course, outdoor sunlight is more destructive, so the light resistance of pigments is better.
3, in the powder coating powder formula, the pigment of pure white powder coating powder is mainly titanium dioxide, and matches a small amount of colored pigment preparation, the amount of titanium dioxide in the formula is 20-30% of the total weight.
Mainly according to the requirements of coating and coating appearance, in addition, and titanium dioxide itself whiteness, covering power and coloring power indicators and other factors are related.
For thin coating powder powder, correspondingly increase the amount of titanium dioxide, in order to meet the coating is very thin in the case of enough covering power.
For white mainly colored, light color powder coating powder formula, the amount of titanium dioxide for the total quality of the formula 10-20%, mainly depends on the color difference and the use of colored pigments with the covering power.
4, for the requirements of lead-free powder coating powder, try to use organic pigments, do not use chromium, iron and other heavy metal pigments.
Non-toxic powder coating powder is required, and such pigments cannot be used.
5. For the commonly used black powder coating powder, the amount of carbon black in the formula is 1.0-1.5% of the total mass of the formula, and the amount is related to the coloring power, covering power and dispersion power of carbon black. There is a great difference between different specifications of products.
If black carbon is of good quality, it can be reduced to 0.8%.
Considering the leveling property and storage stability of powder coating powder, less carbon black has more advantages.