INKJET INK COMPOSITIONS COMPRISING POLYMERIC DISPERSANTS HAVING ATTACHED CHROMOPHORE GROUPS

摘要

The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)_x or is a carbon black pigment and the polymeric dispersant comprises a polymeric, group and at least one group having the formula - A'-(B)_y(C)_z, wherein A and A' are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.