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Title:
AQUEOUS DISPERSION OF SURFACE-TREATED CARBON BLACK AND METHOD OF PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2009/084714
Kind Code:
A1
Abstract:
The purpose of the object is to provide an aqueous dispersion of a carbon black which is suitable as an aqueous black ink for inkjet printers. An aqueous dispersion of a surface-treated carbon black comprising the surface-treated carbon black, which has been chemically modified by dehydrating and condensing a hydrophilic surface functional group of carbon black with an amino group-containing compound by using a triazine-based condensing agent to thereby form an amide bond, dispersed in an aqueous medium; and a method of producing an aqueous dispersion of a surface-treated carbon black which comprises adding an amino group-containing compound and a triazine-based condensing agent to a dispersion wherein a carbon black, which has been oxidized to form a hydrophilic surface functional group, is dispersed in an aqueous medium, stirring the mixture at room temperature to thereby dehydrate and condense the above-described hydrophilic surface functional group with the amino group-containing compound, and then removing large particles, the unreacted amino group-containing compound, a decomposition product of the triazine-based condensing agent and the unreacted matter followed by neutralization, purification and concentration.

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Inventors:
SEKIYAMA MAKOTO (JP)
Application Number:
PCT/JP2008/073927
Publication Date:
July 09, 2009
Filing Date:
December 25, 2008
Export Citation:
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Assignee:
TOKAI CARBON KK (JP)
SEKIYAMA MAKOTO (JP)
International Classes:
C09C1/56; C09C1/48; C09C3/08; C09D11/00; C09D17/00
Foreign References:
JP2007045901A2007-02-22
JP2005255705A2005-09-22
JP2004053726A2004-02-19
JPH11256067A1999-09-21
JPS4818186A
JPH08319444A1996-12-03
JPH1149974A1999-02-23
JPH09286938A1997-11-04
JPH11323229A1999-11-26
JP2005255705A2005-09-22
Other References:
See also references of EP 2243806A4
Attorney, Agent or Firm:
AKATSUKA, Kenji et al. (1-16Kanda Suda-cho, Chiyoda-ku, Tokyo 41, JP)
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