Patent ID: 8328344

Claim:
An aqueous ink composition for inkjet recording, comprising: a coloring material containing at least one selected from the group consisting of azo pigments represented by the following formula (1) and tautomers thereof, and salts and hydrates thereof; a dispersant; and a urethane-modified polyester resin, wherein the urethane-modified polyester resin contains a structural unit derived from a polyester polyol obtained from an alkanediol and a polybasic acid or an acid anhydride thereof, and a structural unit derived from an organic polyisocyanate: wherein Z represents a divalent group derived from a 5- to 8-membered nitrogen-containing heterocycle; Y 1 , Y 2 , R 11 and R 12 each independently represent a hydrogen atom or a substituent; G 1 and G 2 each independently represent a hydrogen atom, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, an aryl group or a heterocyclic group; and W 1 and W 2 each independently represent an alkoxy group, an amino group, an alkyl group or an aryl group.