Patent ID: 6455679
Filing Date: 2002-09-24
Classification: C09B,C09D

Abstract:
An ink-jet recording ink comprising the azo dye represented by the following general formula (I): wherein R1 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, or a substituted or unsubstituted heterocyclic group; R3, R4, R5, and R6 each independently represents a hydrogen atom, a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, an aralkyl group, an aryl group, a heterocyclic group, a cyano group, a hydroxyl group, a nitro group, an amino group, an alkylamino group, an alkoxy group, an aryloxy group, an amide group, an arylamino group, a ureido group, a sulfamoylamino group, an alkylthio group, an arylthio group, an alkoxycarbonylamino group, a sulfonamide group, a carbamoyl group, a sulfamoyl group, a sulfonyl group, an alkoxycarbonyl group, a heterocyclooxy group, an azo group, an acyloxy group, a carbamoyloxy group, a silyloxy group, an aryloxycarbonyl group, an aryloxycarbonylamino group, an imide group, a heterocyclothio group, a sulfinyl group, a phosphoryl group, an acyl group, or an ionic hydrophilic group, which groups may each have a substituent; any of each R1, and R2, R3 and R , and R2 and R5 may be bonded to form a ring; and W represents a group of atoms necessary for forming a nitrogen-containing, 5- to 8-membered heterocycle ring which may be condensed with other ring to form a condensed ring, wherein the nitrogen-containing heterocycle, which is made up of the group W of atoms, and the condensed ring of the heterocycle in the general formula (I) are selected from the group consisting of imidazole, benzimidazole, pyrazole, triazole, thiazole, benzothiazole, isothiazole, benzisothiazole, oxazole, benzoxazole, thiadiazole, 3H-pyrrole, 3H-indole, isoxazole, and benzisoxazole.