Patent ID: 6827771
Filing Date: 2004-12-07
Classification: C09D

Abstract:
An ink composition for inkjet recording comprising:an azo dye having an aromatic nitrogen-containing 6-membered heterocycle as a coupling component; a compound represented by the following formula (I); and an aqueous medium, wherein the azo dye is dissolved or dispersed in the aqueous medium: wherein R101 and R102 each independently represents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an aliphatic oxycarbonyl group, an aromatic oxycarbonyl group, an aliphatic sulfonyl group, an aromatic sulfonyl group, a substituted or unsubstituted carbamoyl group, or a substituted or unsubstituted thiocarbamoyl group; R103 represents an aliphatic group, an aromatic group, a heterocyclic group, an aliphatic oxy group, an aromatic oxy group, an aliphatic thio group, an aromatic thio group, an acyloxy group, an aliphatic oxycarbonyloxy group, an aromatic oxycarbonyloxy group, a substituted or unsubstituted amino group or a hydroxy group; and at least one of a pair R101 and R102, a pair R102 and R103, and a pair R103 and R101 may be coupled to form a 5-, 6- or 7-membered ring with the proviso that the ring formed is not a 2,2,6,6-tetraalkylpiperidine skeleton, wherein the azo dye is represented by the following formula (A-1): wherein A represents a 5-membered heterocyclic group, B1 and B2 represent â€”CR1&boxH; and â€”CR2&boxH;, respectively, or either one of B1 and B2 represents a nitrogen atom and the other one represents â€”CR1&boxH; or â€”CR2&boxH;, G, R1, and R2 each independently represents a hydrogen atom, a halogen atom, an aliphatic group, an aromatic group, a heterocyclic group, a cyano group, a carboxyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a heterocyclic oxycarbonyl group, an acyl group, a hydroxy group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, a silyloxy group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group substituted with an alkyl, aryl or heterocyclic group, an acylamino group, an ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a heterocyclic sulfonylamino group, a nitro group, an alkylthio group, an aryl thio group, a heterocyclic thin group, an alkylsulfonyl group, an arylsulfonyl group, a heterocyclic sulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a heterocyclic sulfinyl group, a sulfamoyl group or a sulfo group, each of which may further be substituted, and R5 and R6 each independently represents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an alkylsulfonyl group, an arylsulfonyl group or a sulfamoyl group, each of which may further be substituted, or a pair R1 and R5, or a pair R5 and R6 may be coupled to form a 5- or 6-membered ring, and wherein the compound represented by the formula (I) is a compound represented by the following formula (IA) or (IB): wherein R111, R112 and R113 each independently represents a hydrogen atom, an aliphatic group, an aromatic group, a heterocyclic group, an acyl group, an aliphatic oxycarbonyl group, an aromatic oxycarbonyl group, an aliphatic sulfonyl group, an aromatic sulfonyl group, a substituted or unsubstituted carbamoyl group, or a substituted or unsubstituted thiocarbamoyl group.