Patent ID: 7390083
Filing Date: 2008-06-24
Classification: C09D

Abstract:
1. An inkjet recording ink comprising an aqueous medium and a phthalocyanine dye dissolved in said aqueous medium, wherein said phthalocyanine dye is a water-soluble dye having an oxidation potential nobler than 1.0 V (vs SCE) and wherein said ink contains two or more different antiseptics, wherein said phthalocyanine dye is represented by the following formula (I): wherein X 1 , X 2 , X 3 and X 4 each independently represents —SO-Z, —SO 2 -Z, —SO 2 NR1R2, a sulfo group, —CONR1R2 or —CO 2 R1; Z represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, and R1 and R2 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, provided that when a plurality of Zs are present, these may be same or different; Y provided that when a plurality of X a M represents a hydrogen atom, a metal atom or an oxide thereof, hydroxide or halide thereof.