| abstract |
The present invention provides: a pigment composition that includes at least (A) a polyallylamine derivative including at least 1% to 50% by mol of a structural unit represented by Formula (1-a), 49% to 95% by mol of a structural unit represented by Formula (1-b) and 1% to 30% by mol of a structural unit represented by Formula (1-c), and (B) a pigment, and improves pigment dispersibility and dispersion stability; an ink composition, a printed article and an inkjet recording method, which use the pigment composition; and a polyallylamine derivative useful for these. n nIn Formula (1-b), R 1 represents —NHCOR 3 or —NH 3 + OCOR 3 , in which R 3 represents a residue obtained by removing a carboxy group from any one of polyester, polyamide or polyesteramide, which each have a free carboxylic acid. In Formula (1-c), R 2 represents —NHCOR 4 or —NH 3 + OCOR 4 , in which R 4 represents an organic group having an aromatic ring or a heteroaromatic ring. |