Patent ID: 7691194

Claim:
A self-dispersible colorant represented by the formula I below: In the Formula I, R 1 , R 2 , R 3 , and R 4 are each independently a substituted or unsubstituted C 6 -C 20 aryl group, a substituted or unsubstituted C 3 -C 20 heteroaryl group, a C 2 -C 12 alkenyl group, a substituted or unsubstituted C 7 -C 20 arylalkyl group, a halogen, NO 2 , CN, a C 1 -C 6 alkoxy group; or R 1 and R 2 together form R 5 -(R 6 -)C═, wherein R 5 and R 6 are each a hydrogen atom or a C 1 -C 4 alkyl group; R 2 and R 3 can form a bond together, R 1 and R 4 together form a C 2 to C 15 cyclic or heterocyclic group.