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:
May. 26, 2026
Filed:
Aug. 12, 2021
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Hiroyuki Shimanaka, Tokyo, JP;
Yoshikazu Murakami, Tokyo, JP;
Jun Kamabayashi, Tokyo, JP;
Toshiyasu Fujita, Tokyo, JP;
Kazutaka Arai, Tokyo, JP;
Sachio Yoshikawa, Tokyo, JP;
DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., Tokyo, JP;
Abstract
An environmentally friendly pigment dispersant composition having a significantly reduced content of a volatile component despite of including a pigment dispersant that contains a constituent unit derived from a vinyl-based monomer, is provided. The composition can provide a pigment dispersion and an ink having excellent pigment dispersability. This pigment dispersant composition contains a polyglycol component and a polymer component having a constituent unit (1) derived from a macromonomer represented by formula (1), and a constituent unit (2) derived from a functional group-containing vinyl-based monomer, where the polyglycol component is a polyalkylene glycol or the like and has a content of an organic compound having a boiling point of 250° C. or lower of 1% by mass or less: