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. 12, 2011
Filed:
May. 26, 2006
Shigemi Toda, Tokyo, JP;
Makoto Sekiyama, Tokyo, JP;
Shigemi Toda, Tokyo, JP;
Makoto Sekiyama, Tokyo, JP;
Tokai Carbon Co., Ltd., Tokyo, JP;
Abstract
A carbon black aqueous dispersion which has excellent dispersibility in an aqueous medium and is suitable as an aqueous black ink, such as an inkjet printer ink and a method of producing the same. The carbon black aqueous dispersion includes an aqueous medium and a carbon black pigment dispersed in the aqueous medium, wherein some or all of the hydrogen atoms of the acidic groups produced by liquid-phase oxidation of the carbon black are replaced with a basic amino acid salt group by neutralization with a basic amino acid. The method of producing a carbon black aqueous dispersion includes subjecting carbon black to liquid-phase oxidation, removing reduced salts from the resulting slurry, neutralizing the slurry with a basic amino acid to replace some or all of the hydrogen atoms of the acidic groups with a basic amino acid salt group to form a basic amino acid salt compound, and purifying the resulting product.