| 摘要 |
PROBLEM TO BE SOLVED: To provide a pigment dispersant having excellent dispersion stability of a pigment, and for obtaining an aqueous ink allowing printing in high concentrations.SOLUTION: A pigment dispersant comprises a polymer (X) comprising a constitutional unit (a) represented by formula (1) as an essential constitutional unit, where Rrepresents a C1-3 alkylene group; Rand Rindependently represent a C1-3 alkyl group; and Mrepresents an alkali metal cation, an onium cation or a hydrogen ion. |
