1. Excellent chemical stability.
Excellent chemical stability not only means that the pigment has good fastness to various chemicals, such as gasoline resistance, lubricant resistance, acid resistance, alkali resistance, solvent resistance (bleed resistance), salt spray resistance, water resistance, resistance It is hot and humid, and it has good fastness to sunlight, rain, ultraviolet rays, and sulfur dioxide when used outdoors for a long time under various climatic conditions. In addition, considering the over-baking test when the automotive coating is cured, it should also have a higher heat resistance temperature (180 ℃).
2. Excellent color performance.
In a well-dispersed state, the color, hue and saturation of the pigment should meet the user's requirements. Usually have higher coloring power and gloss of coating film. Opaque pigments should have high hiding power, and transparent pigments should have good transparency. In addition, the color reproducibility of the pigments is better, that is, different batches of pigments of the same brand must have a narrow allowable range of color indicators such as primary colors, hue, and tinting strength.
3. Good application performance.
When grinding, dispersing and matching paints, the pigments must have good dispersion, anti-flocculation and storage stability, and the resulting color paste must have good fluidity to meet the process requirements of computer automatic color matching in the manufacture of modern automotive coatings.