分散剂又称湿润分散剂，它除具有湿润作用外，其活性基团一端能吸附在粉碎成细小微粒的颜料表面，另一端溶剂化进入漆基形成吸附层（吸附基越多，链节越长，吸附层越厚），产生电荷斥力（水性涂料）或熵斥力（溶剂型涂料），使颜料粒子长期分散悬浮于漆基中，避免再次絮凝，因而保证制成的色漆体系的贮存稳定。
Dispersant is also called wetting dispersant. Besides wetting effect, one end of its active group can be adsorbed on the surface of pigments crushed into fine particles. The other end can be solvated into the paint base to form an adsorption layer (the more adsorption groups, the longer the chain segments, the thicker the adsorption layer), which can generate charge repulsion (water-based paint) or entropy repulsion (solvent-based paint). Paint, so that the pigment particles long-term dispersion suspended in the paint base, to avoid re-flocculation, thus ensuring the stability of the prepared paint system storage.