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:
Aug. 20, 2024
Filed:
Sep. 16, 2021
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Hiroyuki Shimanaka, Tokyo, JP;
Jun Kamabayashi, Tokyo, JP;
Sachio Yoshikawa, Tokyo, JP;
Toshie Okubo, Tokyo, JP;
Lu Tian, Tokyo, JP;
Akifumi Tanaka, Tokyo, JP;
Dainischiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Abstract
An aqueous pigment dispersion for preparing an environmentally conscious aqueous inkjet ink in which a pigment is finely and stably dispersed and which records images having excellent durability, glossiness, color developability, and adhesiveness to various printing substrates. The aqueous pigment dispersion contains a pigment, water, a water-soluble organic solvent, and a polymeric dispersant that disperses the pigment. The polymeric dispersant is a polymer including a constitutional unit (i) derived from (meth)acrylic acid and/or itaconic acid, and a constituent unit (ii) derived from (meth)acrylate derived from biological material, such as ethyl (meth)acrylate, having an acid value of 30 to 250 mgKOH/g, number average molecular weight of 1,000 to 30,000, and a polydispersity index (weight average molecular weight/number average molecular weight) of 2.5 or less. The content of the constituent unit (ii) is 50% by mass or more, and at least part of carboxy groups is neutralized with an alkali.