| abstract |
PROBLEM TO BE SOLVED: To provide a pigment dispersant which gives low viscosity, high gloss, clear color tone and storage stability and has good compatibility with a urethane resin binder. A graft polymer (C) comprising a main chain (A) and a side chain (B), wherein the main chain (A) is an amino group, an imino group and a monovalent or divalent aromatic hydrocarbon. The polyurethane resin (a1) and / or polyurea resin (a2) having at least one selected from the group consisting of groups, and the side chain (B) from the polyether skeleton (b1) and / or the polyester skeleton (b2) A pigment dispersant for printing ink, characterized by comprising the graft polymer. [Selection figure] None |