To provide a method for producing a compound that enhances dispersibility of a pigment of respective colors in a water-insoluble solvent, as well as a pigment dispersant, and a pigment composition, a pigment dispersion and a toner having a good tinting power. A method for producing a compound, including the following:
(i): subjecting a polymerizable monomer forming a monomer unit represented by formula (1) to radical polymerization in the presence of a radical polymerization initiator and an iodine molecule to provide a polymer; and
(ii) : binding a colorant to a terminal of a main chain of the polymer:
wherein
R1 represents a hydrogen atom and an alkyl group, and
R2 represents a phenyl group, a carboxyl group, an alkoxycarbonyl group or a carboxamide group.
提供一种生产化合物的方法,该化合物增强了各种颜色的
颜料在不溶于
水的溶剂中的分散性,以及一种
颜料分散剂、
颜料组合物、
颜料分散液和具有良好着色能力的色调的色调剂。生产化合物的方法包括以下步骤:(i):在自由基聚合
引发剂和
碘分子的存在下,将由式(1)表示的单体单元形成的聚合单体进行自由基聚合,以提供聚合物;和(ii):将
颜料结合到聚合物的主链末端:其中R1代表氢原子和烷基,R2代表苯基、羧基、烷氧基羰基或羧酰胺基。