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:
Jan. 01, 2019
Filed:
Feb. 16, 2016
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Akira Kawaguchi, Tokyo, JP;
Akio Kuwahara, Tokyo, JP;
NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An inkjet aqueous pigment dispersion which achieves high pigment concentration, exhibits favorable redispersion properties after drying, and does not exhibit changes in ink properties even when stored for a long time; and an ink composition using the aqueous pigment dispersion. The inkjet aqueous pigment dispersion contains a pigment, a liquid medium, and a polymer dispersion agent which is an A-B block polymer obtained by copolymerization using a mixture of an organic tellurium compound represented by formula (1) and an organic ditellurium compound represented by formula (2) as a polymerization initiator. The monomer for configuring the A block is at least one type of monomer represented by formula (3), and the monomer for configuring the B block is benzyl methacrylate and/or benzyl acrylate.