涂料和油漆在贮存期间经常发生沉淀、凝聚现象,颜料粒子在桶底结成硬块,不能使用。涂料工作者根据长期的观察和研究,认为涂料和油漆中的颜料出现沉淀和凝聚有以下几种原因:颜料粒子粗,没有研磨细;基料固体含量低,粘度小;各种颜料粒子相互接触,形成松弛的结合,导致粒径变大;重质颜料用量过多。懂得这个道理之后,涂料油漆的沉淀问题就能迎刃而解了。其方法是:使用粘度大、固体部分含量多的基料。如果基料粘度小,可采取外加增稠剂,以减缓颜 Paints and paints often precipitate and agglomerate during storage. Pigment particles form a hard block at the bottom of the barrel and cannot be used. According to long-term observations and studies, painters believe that pigments in paints and paints are precipitated and agglomerated for several reasons: coarse pigment particles without fine grinding; low solids content and low viscosity; various pigment particles in contact with each other Relaxation of the combination, resulting in larger particle size; heavy pigments used too much. After understanding this principle, the problem of sedimentation of paint can be solved. The method is: using a binder with a large viscosity and a large solid content. If the viscosity of the base material is small, an extra thickener may be added to reduce the color