9279 deflocculates pigments through steric hindrance. They provide the same charge to different pigments, thus avoid possible co-flocculation of pigments with different charges. This dispersant not only has good wettability and low bubble, but also has excellent anti-settling, anti-flocculation and anti-floating ability. In addition to its excellent dispersion effect and viscosity reduction effect, the prepared color paste also has slight thixotropy. It has excellent anti-settling and anti-water separation effect without adding thickener. It also has a good help to the anti-shrinkage hole of the paint film. As a special dispersant for water-based coatings, it has very strong versatility with a good dispersion effect on inorganic pigments, organic pigments, carbon black, titanium dioxide and iron oxide. It is suitable for water-based resin-free colorants and also suitable for grinding containing resins, which will not affect the water resistance of the paint film.