The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2022
Filed:
Oct. 15, 2018
Kao Corporation, Tokyo, JP;
KAO CORPORATION, Tokyo, JP;
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).