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. 07, 2016
Filed:
Dec. 22, 2011
Yoshinosuke Shimamura, Kitaadachi-gun, JP;
Hiroyuki Buei, Kitaadachi-gun, JP;
Yukihiko Kawaharada, Kitaadachi-gun, JP;
Shinichi Okada, Kitaadachi-gun, JP;
Soetrisno Misawa, Jakarta, ID;
Yoshinosuke Shimamura, Kitaadachi-gun, JP;
Hiroyuki Buei, Kitaadachi-gun, JP;
Yukihiko Kawaharada, Kitaadachi-gun, JP;
Shinichi Okada, Kitaadachi-gun, JP;
Soetrisno Misawa, Jakarta, ID;
DIC CORPORATION, Tokyo, JP;
Abstract
Disclosed are an ink jet recording water-based ink having excellent long-term storage stability and ejection stability at a pigment concentration greater than or equal to a certain level and a simple and efficient method for producing such a water-based ink. The present invention provides an ink jet recording water-based ink in which the total content of polyvalent metals as impurities in the water-based ink is not more than 1.2 ppm in terms of 1 mass % of a pigment concentration. Furthermore, the present invention provides a method for producing an ink jet recording water-based ink; the method enables efficient production of the above-mentioned ink jet recording water-based ink through a contact treatment with a particulate chelating resin in which each resin particle contains both an alkali metal-bonded chelating group and a hydrogen-bonded chelating group.