| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aqueous dispersion of carbon black, having good dispersibility in an aqueous medium, and excellent rub resistance (quick-drying), jetting stability or the like as a water-based ink exemplified by ink for ink jet printer; and to provide a method for producing the aqueous dispersion. <P>SOLUTION: The aqueous dispersion of the carbon black is obtained by dispersing the carbon black wherein the acid group of the surface of the carbon black formed by liquid phase oxidation treatment is neutralized by basic amino acids and a basic compound except the basic amino acids, and the hydrogen group of the acidic group is substituted with the basic amino acid and the basic compound. The method for producing the aqueous dispersion comprises subjecting the carbon black to the liquid phase oxidation, removing a reduced salt in the slurry, neutralizing the resultant carbon black with the basic amino acids and the basic compound except the basic amino acids to substitute the hydrogen group of the acidic group with the basic amino acid and the basic compound, and purifying the product. <P>COPYRIGHT: (C)2007,JPO&INPIT |
