公开(公告)号：US11535765B2

公开(公告)日：2022-12-27

申请号：US16756037

申请日：2018-10-15

Applicant: KAO CORPORATION

Inventor： Tsuyoshi Egawa ,  Kaname Mitsuyoshi ,  Shimpei Nishimura

IPC: C09D11/037 ,  C09D11/326 ,  C09D11/322 ,  C09D11/03 ,  B41M5/00 ,  B41J2/01

Abstract: The present invention relates to [1] a water-based ink containing an azomethine metal complex pigment (A), an aromatic group-containing polymer (B), an organic solvent (D) and water, in which a mass ratio of the azomethine metal complex pigment (A) to the aromatic group-containing polymer (B) [(A)/(B)] is not less than 1.4 and not more than 4, and the aromatic group-containing polymer (B) is a crosslinked polymer obtained by crosslinking an aromatic group-containing polymer (b) having an acid value of not less than 80 mgKOH/g and not more than 400 mgKOH/g with a water-insoluble polyfunctional epoxy compound (c), said water-based ink being excellent in storage stability and maintenanceability, and [2] a process for producing a pigment water dispersion liquid of particles of the aromatic group-containing polymer (B) containing the azomethine metal complex pigment (A).