Patent ID: 6758890
Filing Date: 2004-07-06
Classification: C09B,C09D

Abstract:
Aqueous ink for ink jet recording comprising a coloring matter and an aqueous medium, in which at least one of dyes represented by the formula (A) or a salt thereof is contained as the coloring matter wherein R1 and R3, independently from each other, represent a hydrogen atom, a hydroxyl group or a halogen atom, R2 and R4, independently from each other, represent a hydrogen atom, an optionally substituted alkyl group, an optionally substituted aryl group or an optionally substituted aralkyl group, A represents a phenyl group or a naphthyl group, wherein the phenyl group or the naphthyl group may be substituted with any of a halogen atom, a hydroxyl group, an amino group, an optionally substituted alkyl group, an alkoxy group, a carboxyl group, a carboxylic acid ester group, a carboxylic acid amide group, a sulfonic acid group and a sulfonic acid amide group, X represents a divalent bonding group represented by the formula (2) in which Z represents â€”COâ€”, â€”NHCONHâ€”, â€”NHCSNHâ€” or formula (3) wherein the divalent bonding group may be substituted with a halogen atom, an alkyl group, an alkoxy group, a hydroxyl group, an amino group, a carboxyl group or a sulfonic acid group, and m and n, independently from each other, represent an integer of 1 to 4.