9511 has excellent viscosity reduction effect and is helpful to improve the leveling, gloss and fullness of the system. This product has high molecular weight and excellent wettability. Compared with small molecule wetting dispersants, it has excellent ability to prevent back coarsening. It is suitable for various polar systems, especially in medium and high polar systems with excellent effect. It can significantly improve the wetting and dispersing ability of the base material on the pigment filler, improve fluidity, and shorten the grinding and dispersing time. This product also has excellent anti-settling ability, for inorganic pigment fillers, especially titanium dioxide, it has excellent viscosity reduction and dispersion ability. It can be used for grinding high titanium dioxide content of the color paste, greatly increasing the storage stability of the color paste. The product also has excellent wetting and dispersing effect on inorganic pigments such as matting powder and iron oxide. The pigment affinity group of the dispersant is an acidic compound, so it will not react with the acid catalyst in the coil steel system and affect the performance of the coating.