PIGMENT COMPOSITION, METHOD OF PRODUCING WATER-BASED PIGMENT DISPERSION, WATER-BASED INK FOR INKJET RECORDING
申请人:INUSHIMA Reiko
公开号:US20100216936A1
公开(公告)日:2010-08-26
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):
wherein, in Formulae (1) to (3), R
1
represents a hydrogen atom or a methyl group; R
2
represents a hydrogen atom or a substituent; L
1
represents a single bond or a divalent linkage group; and Ar represents a monovalent aromatic group.