| 摘要 |
<p>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 hydrogen atoms of 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 hydrogen atoms of acidic groups with a basic amino acid salt group to form a basic amino acid salt compound, and purifying the resulting product.</p> |
