Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
2011-04-12
2011-04-12
Lorengo, Jerry (Department: 1731)
Compositions: coating or plastic
Coating or plastic compositions
Marking
C106S400000
Reexamination Certificate
active
07922801
ABSTRACT:
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 the hydrogen atoms of the 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 the hydrogen atoms of the acidic groups with a basic amino acid salt group to form a basic amino acid salt compound, and purifying the resulting product.
REFERENCES:
patent: 6218459 (2001-04-01), Gruning et al.
patent: 2009/0114119 (2009-05-01), Horii
patent: WO 2005010105 (2005-02-01), None
Sekiyama Makoto
Toda Shigemi
Faison Gee Veronica
Flynn ,Thiel, Boutell & Tanis, P.C.
Lorengo Jerry
Tokai Carbon Co., Ltd.
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