Pigment composition, method of producing water-based pigment dispersion, water-based ink for inkjet recording

摘要

The present invention provides a water-based pigment composition including a pigment; a dispersant; and water, the dispersant including: a repeating unit including an ionic group; at least one of a repeating unit represented by Formula (2) or a repeating unit represented by Formula (3); and a repeating unit represented by Formula (1), a content of the repeating unit represented by Formula (1) being 20% by mass or more but less than 50% by mass with respect to a total amount of repeating units represented by Formulae (1) to (3), which is excellent in stability over time with finely dispersed pigment(s):
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wherein, in Formulae (1) to (3), R<Sub>1</Sub> represents a hydrogen atom or a methyl group; R<Sub>2</Sub> represents a hydrogen atom or a substituent; L<Sub>1</Sub> represents a single bond or a divalent linkage group; and Ar represents a monovalent aromatic group.