Patent ID: 8921018

Claim:
A pigment dispersant composition, comprising: a pigment and a polymer compound represented by the following Formula (2): A 2 -R 4 —S n R 3 (S—R 5 —P 2 ) m Formula (2) wherein, in Formula (2), R 3 represents an organic linking group having a valency of (m+n); R 4 and R 5 each independently represents a single bond or a divalent organic linking group; A 2 represents a monovalent organic group comprising at least moiety that has an ability to be adsorbed to pigments and that is selected from the group consisting of an organic dye structure, a heterocyclic structure, an acidic group, a group having a basic nitrogen atom, a urea group, a urethane group, a group having a coordinating oxygen atom, a hydrocarbon group having 4 or more carbon atoms, an alkoxysilyl group, an epoxy group, an isocyanate group, and a hydroxyl group; A 2 s, n in number, are independent from each other, and may be the same or different from each other; R 4 s, n in number, are independent from each other, and may be the same or different from each other; m is from 1 to 8; n is from 2 to 9; m+n is from 3 to 10; P 2 represents a polymer skeleton; and P 2 s, m in number, are independent from each other, and may be the same or different from each other; and R 5 s, m in number, are independent from each other, and may be the same or different from each other.