Patent ID: 8293837

Claim:
A pigment dispersion, comprising: (a) a pigment; and (b) a polymer compound as a dispersant for the pigment (a), wherein the polymer compound comprises a urethane bond in a main chain, comprises a pendant moiety comprising a skeleton which is the same as a partial skeleton of the pigment (a), and further comprises, at a side chain, at least one polymer chain selected from the group consisting of a polyester chain, a poly(meth)acrylate chain, and a polyalkylene oxide chain, wherein the molecular weight of the skeleton which is the same as a partial skeleton of the pigment (a) is from 20 to 70% of the molecular weight of the pigment (a), and wherein the skeleton which is the same as a partial skeleton of the pigment (a) is a fused ring structure consisting of two or more rings.