Patent ID: 7638610

Claim:
A self-dispersible metal complex colorant represented by formula 2: wherein: R 1 is selected from the group consisting of a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 1 -C 20 heteroalkylene group, a substituted or unsubstituted C 2 -C 20 alkenylene group, and a substituted or unsubstituted C 2 -C 20 heteroalkenylene group; and R 2 is selected from the group consisting of a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 heteroalkyl group, a substituted or unsubstituted C 2 -C 20 alkenyl group, and a substituted or unsubstituted C 2 -C 20 heteroalkenyl group; each of X 3 and X 4 is independently selected from the group consisting of a hydrogen atom, a halogen atom, a hydroxy group, a carboxyl group, a substituted or unsubstituted amino group, a sulfonic acid group, a phosphoric acid group, a substituted or unsubstituted C 1 -C 20 alkyl group, a substituted or unsubstituted C 1 -C 20 heteroalkyl group, a substituted or unsubstituted C 2 -C 20 alkenyl group, a substituted or unsubstituted C 2 -C 20 heteroalkenyl group, a substituted or unsubstituted C 6 -C 30 aryl group, and a substituted or unsubstituted C 6 -C 30 heteroaryl group, each of X 1 and X 2 is selected from the group consisting of a hydroxy group, a C 1 -C 4 alkoxy group, a carboxyl group, and a substituted or unsubstituted amino group; M is a polyvalent transition metal; L is a neutral or anionic ligand; T is a mono- or poly-substituted hydrophilic functional group; n is an integer between 1 and 3; and J is a linker.