Patent ID: 7598012

Claim:
A coloring compound represented by the formula: A-L 1 -X-L 2 -B (1) wherein A is a coloring moiety, B is a stabilizing moiety having fading-preventing ability, L 1 and L 2 are linkers for linking A, X and B by covalent bonding and denote —O—, and X is a spacer moiety and denotes an alkylene group having 1 to 10 carbon atoms, wherein the coloring moiety A has a triphenylmethane structure represented by the formula (2): wherein R 2 and R 3 are, independently of each other, hydrogen, a substituted or unsubstituted alkyl group having 1 to 5 carbon atoms, a substituted or unsubstituted aryl group or a substituted or unsubstituted aralkyl group, R 4 is hydrogen, halogen, or a substituted or unsubstituted alkyl or alkoxy group having 1 to 5 carbon atoms, R 5 and R 6 are, independently of each other, hydrogen, halogen, or a substituted or unsubstituted alkyl, alkoxy, hydroxyl, carboxylate or sulfonate group, wherein in formula (2), one of R 5 and R 6 forms a covalent bond with L 1 , wherein the stabilizing moiety B has a hindered amine structure represented by the formula (4): wherein R 12 is hydrogen, or a hydroxyl, alkyl, alkenyl, alkynyl, aralkyl, aryl, acyl, sulfonyl, sulfinyl, alkoxy, aryloxy, acyloxy or oxy radical group, R 13 is a hydroxyl, carboxyl or amino group, wherein in formula (4), R 13 forms a covalent bond with L 2 , and wherein the compound of the general formula (2) has a counter anion.