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:
Jul. 31, 2012
Filed:
Aug. 27, 2009
Hidenori Otsuka, Kanagawa-ken, JP;
Masayuki Fukaishi, Chiba-ken, JP;
Takashi Ishizuka, Chiba-ken, JP;
Koji Ueno, Ibaraki-ken, JP;
Yoshihiro Saito, Tokyo-to, JP;
Teruaki Okawa, Ibaraki-ken, JP;
Naofumi Ezaki, Ibaraki-ken, JP;
Hidenori Otsuka, Kanagawa-ken, JP;
Masayuki Fukaishi, Chiba-ken, JP;
Takashi Ishizuka, Chiba-ken, JP;
Koji Ueno, Ibaraki-ken, JP;
Yoshihiro Saito, Tokyo-to, JP;
Teruaki Okawa, Ibaraki-ken, JP;
Naofumi Ezaki, Ibaraki-ken, JP;
Abstract
An inkjet ink that prevents paper deformation such as curling, and also exhibits favorable pigment dispersibility. The inkjet ink includes at least a pigment, water, a water-soluble organic solvent having an α value of not more than 65, and a dispersant, wherein the dispersant is a copolymer having a unit A represented by general formula (a) shown below and a unit B represented by general formula (b) shown below, and the mass ratio between the water-soluble organic solvent and the water satisfies (water-soluble organic solvent)/water=5/5 to 8/2. [In general formula (a), Rrepresents a hydrogen atom or a lower alkyl group, and m represents an integer of 1 to 3.] [In general formula (b), Rand Reach represents a hydrogen atom or a lower alkyl group, wherein Rand Rmay be the same or different, and n represents an integer of 1 to 250.]