Index Number: Pigment Brown 25
C.I. Structure Number: 12510
Chemical category: Benzimidazolones
Molecular formula: C₂₄ H₁₅ C1₂ N₅ O₃
Relative molecular mass: 492.34
Ranbar Brown P7028/P7030 benzimidazolone brown organic pigment, pigment brown 25, this pigment shows a reddish brown, with a hue angle of 43.5 degrees (1/3 SD, HDPE), but has a stronger yellow appearance than CI Pigment Brown 23, it is lighter and more transparent.
Mainly used in coatings, printing inks and plastics, such as automotive primers (OEM), refinishing paints; combined with iron oxide red inorganic pigments to make brown to reddish brown;
Excellent light fastness and weather fastness, the light fastness in the dilute color (1:300 TiO₂) alkyd melamine amine is still up to 7-8; in PVC, the heat resistance is 200℃, and the light fastness is 8. HDPE is heat-resistant to 290℃, and the dimensional deformation below 200℃ is not obvious;
It can also be used for polyacrylonitrile and PP spinning coloring.
