| abstract |
[Problem] The purpose of the present invention is to provide a dispersant composition which exhibits excellent pigment dispersibility. [Solution] A dispersant composition according to the present invention is characterized by being obtained by mixing: (a) a block copolymer which has a block A having an acidic group and a block B containing structural units represented by general formulae (1) and (2); (b) an aromatic compound; and (c) a tertiary amine compound. (In formulae (1) and (2), each of R11, R12, R13, R21 and R22 independently represents an optionally substituted chain or cyclic hydrocarbon group; two or more of the R11, R12 and R13 moieties may combine with each other to form a cyclic structure; the R21 and R22 moieties may combine with each other to form a cyclic structure; each of R14 and R23 represents a hydrogen atom or a methyl group; each of X1 and X2 represents a divalent linking group; and Y- represents a counter ion.) |