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:
Apr. 02, 2013
Filed:
Jan. 14, 2010
Shoji Koike, Yokohama, JP;
Ikuo Nakazawa, Kawasaki, JP;
Taketoshi Okubo, Asaka, JP;
Akira Kuriyama, Atsugi, JP;
Masayuki Ikegami, Atsugi, JP;
Atsuhito Yoshizawa, Kawasaki, JP;
Shoji Koike, Yokohama, JP;
Ikuo Nakazawa, Kawasaki, JP;
Taketoshi Okubo, Asaka, JP;
Akira Kuriyama, Atsugi, JP;
Masayuki Ikegami, Atsugi, JP;
Atsuhito Yoshizawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides an ink jet recording ink containing a self-dispersion pigment to a surface of which an anionic functional group represented by the following general formula (1) is bonded directly or through another atomic group, an ammonium salt of an organic carboxylic acid, water, and a water-soluble compound having a hydrophilicity-hydrophobicity coefficient of 0.26 or more as defined by the following equation (A), the ink having a surface tension of 34 mN/m or less, wherein Mand Mare, independently of each other, a hydrogen atom, alkali metal, ammonium or organic ammonium;Hydrophilicity-hydrophobicity coefficient=[(Water activity of a 20% aqueous solution)−(Molar fraction of water in the 20% aqueous solution)]/[1−(Molar fraction of water in the 20% aqueous solution)]  (A).