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:
Jun. 27, 2017
Filed:
Aug. 25, 2010
Method for producing water-based pigment dispersion liquid and water-based ink for ink jet recording
Masahiro Kido, Ina-machi, JP;
Shinichi Okada, Ina-machi, JP;
Atsuo Kobayashi, Niiza, JP;
Soetrisno Misawa, Jakarta, ID;
Masahiro Kido, Ina-machi, JP;
Shinichi Okada, Ina-machi, JP;
Atsuo Kobayashi, Niiza, JP;
Soetrisno Misawa, Jakarta, ID;
DIC CORPORATION, Tokyo, JP;
Abstract
A highly efficient method is provided for producing a water-based ink for ink jet recording with which the number of coarse particles in a water-based pigment dispersion liquid is significantly reduced, dispersed particles are made finer, the dispersion stability is improved, the storage stability is improved, and high discharge stability is achieved when a water-based ink for ink jet recording is produced. Particularly, provided is a method for producing a water-based pigment dispersion liquid, the method including kneading a mixture containing a quinacridone type pigment (a), a styrene-acrylic acid type copolymer (c), a basic compound (d), and a polyoxyalkylene glycol or its derivative (e) to prepare a pigment dispersion that is solid at room temperature and mixing a aqueous medium and the pigment dispersion to decrease the viscosity and liquefy the pigment dispersion.