The present invention provides a pigment dispersant: that is capable of remarkably ameliorating fluidity of a liquid product, such as an ink or a paint, which contains particles of a pigment, such as a black azo pigment, in a dispersed state; that can suppress aggregation of pigment particles; that prevents occurrence of foreign substances; and that is capable of producing a colored article excellent in optical density. Provided is a pigment dispersant being a compound represented by the following formula (1).
wherein R1 and R2 each independently represent a group obtained by eliminating one hydrogen atom from an amino group of an amine compound containing a basic nitrogen atom, and R3 and R4 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, or a hydroxy group.
本发明提供了一种
颜料分散剂:它能够显著改善含有分散状态
颜料(如黑色偶氮
颜料)颗粒的液体产品(如油墨或涂料)的流动性;能够抑制
颜料颗粒的聚集;防止异物的产生;以及能够生产出光密度极佳的有色物品。所提供的
颜料分散剂是由下式(1)表示的化合物。
其中 R1 和 R2 各自独立地代表通过从含有碱性氮原子的胺化合物的
氨基中消除一个氢原子而得到的基团,R3 和 R4 各自独立地代表氢原子、卤素原子、烷基、烷氧基或羟基。