Title:
AQUEOUS DISPERSION OF CARBON BLACK AND METHOD OF PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/017999
Kind Code:
A1
Abstract:
It is intended to provide an aqueous dispersion of carbon black, which is excellent in the dispersibility in an aqueous vehicle and shows high friction resistance (quick-drying properties), jetting stability and so on as a water-based black ink such as an ink for ink jet printers, and a method of producing the same. Namely, an aqueous dispersion of carbon black characterized in that carbon black, wherein acidic groups formed by liquid-phase acidification on the surface of carbon black particles are neutralized with basic amino acids and basic compounds other than the basic amino acids while hydrogen groups in the acidic groups are substituted by the basic amino acids and the basic compounds, is dispersed in an aqueous vehicle. A method of producing the same which is characterized by comprising liquid-phase acidifying carbon black, removing reduced salts from the slurry, neutralizing with basic amino acids and basic compounds other than the basic amino acids, substituting hydrogen groups in the acidic groups by the basic amino acids and the basic compounds and purifying.
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Inventors:
HORII TOSHIYA (JP)
Application Number:
PCT/JP2006/313194
Publication Date:
February 15, 2007
Filing Date:
June 27, 2006
Export Citation:
Assignee:
TOKAI CARBON KK (JP)
HORII TOSHIYA (JP)
HORII TOSHIYA (JP)
International Classes:
C09C1/56; C01B31/02; C09C3/00; C09D17/00
Foreign References:
| JPH10120958A | 1998-05-12 | |||
| JPH09286938A | 1997-11-04 | |||
| JP2003064279A | 2003-03-05 | |||
| JP2004107513A | 2004-04-08 | |||
| JP2003183541A | 2003-07-03 | |||
| JP2003183540A | 2003-07-03 | |||
| JP2003183539A | 2003-07-03 |
Other References:
See also references of EP 1914276A4
Attorney, Agent or Firm:
FUKUDA, Yasuo et al. (1-16 Kanda Suda-ch, Chiyoda-ku Tokyo 41, JP)
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