Patent ID: 7582152

Claim:
A pigment dispersion comprising: a color pigment represented by formula (I): and a polymeric dispersant having, via a linking group covalently linked to its polymeric backbone, at least one pending chromophore group which has a molecular weight smaller than 95% of the molecular weight of the color pigment; wherein R1 to R10 are independently selected from the group consisting of hydrogen, a halogen atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, —CF 3 , —COOH, —COOCH 3 , —SO 2 NH—C 6 H 5 , —CONH—C 6 H 5 , —CONH—C 6 H 5 —CONH 2 , and —CONH 2 ; and the pigment dispersion is an inkjet ink and the pigment comprises 0.1 wt % to 20 wt % of the inkjet ink based on a total weight of the inkjet ink.