Title:
SURFACE-MODIFIED CARBON BLACK AND DISPERSIONS THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/069707
Kind Code:
A1
Abstract:
The invention provides surface-modified carbon black which exhibits excellent dispersibility in silicone oil which is a nonpolar medium; and dispersions of the surface-modified carbon black. The surface-modified carbon black is characterized by chemical bonding of an isocyanate compound having isocyanate groups at both ends which compound is bound to a functional group on the surface of carbon black by a urethane linkage to a reactive silicone polymer, while the dispersions are characterized by being produced by dissolving an isocyanate compound having isocyanate groups at both ends in a solvent, adding carbon black to the solution to bind an isocyanate group to the surface of carbon black particles by a urethane linkage, removing unreacted isocyanate compound, dispersing the resulting system in silicone oil, adding a reactive silicone polymer to the dispersion, and subjecting the resulting dispersion to mixing and defoaming.
Inventors:
SEKIYAMA MAKOTO (JP)
KIRINO TOMOAKI (JP)
KIRINO TOMOAKI (JP)
Application Number:
PCT/JP2006/325002
Publication Date:
June 21, 2007
Filing Date:
December 08, 2006
Export Citation:
Assignee:
TOKAI CARBON KK (JP)
SEKIYAMA MAKOTO (JP)
KIRINO TOMOAKI (JP)
SEKIYAMA MAKOTO (JP)
KIRINO TOMOAKI (JP)
International Classes:
C09C1/56; C09C3/12; C09D7/62; C09D17/00
Domestic Patent References:
| WO1997000295A1 | 1997-01-03 |
Foreign References:
| JPS4865233A | 1973-09-08 | |||
| JPS6479278A | 1989-03-24 | |||
| JPH10324819A | 1998-12-08 | |||
| JP2004341278A | 2004-12-02 | |||
| JPH04370160A | 1992-12-22 |
Other References:
See also references of EP 1967552A4
Attorney, Agent or Firm:
FUKUDA, Yasuo et al. (1-16 Kanda Suda-cho, Chiyoda-k, Tokyo 41, JP)
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