METHOD FOR PRODUCING AQUEOUS DISPERSION OF SURFACE-TREATED CARBON BLACK PARTICLES AND AQUEOUS DISPERSION OF SURFACE-TREATED CARBON BLACK PARTICLES

Title:

METHOD FOR PRODUCING AQUEOUS DISPERSION OF SURFACE-TREATED CARBON BLACK PARTICLES AND AQUEOUS DISPERSION OF SURFACE-TREATED CARBON BLACK PARTICLES

Document Type and Number:

WIPO Patent Application WO/2012/121362

Kind Code:

A1

Abstract:

Provided is a method for producing an aqueous dispersion of surface-treated carbon black particles that shows an excellent degree of black and dispersibility; when used as a water-based black ink, has excellent shelf life, shows little feathering, has excellent discharge stability and smear resistance (fast drying performance); and has a strong effect in terms of preventing metal corrosion. The method for producing an aqueous dispersion of surface-treated carbon black particles is characterized in that in an aqueous dispersion of oxidized carbon black particles wherein acidic hydroxyl groups have been imparted to the surface of carbon black particles having a DBP absorption of 120 cm3/100 g or greater, 5% or more but less than 50% of the acid hydroxyl groups are neutralized by polyvalent cations and then the remainder of the acidic hydroxyl groups are neutralized by monohydric cations.

Inventors:

SEKIYAMA MAKOTO (JP)
SAITOH TETSUYA (JP)
KIRINO TOMOAKI (JP)

Application Number:

PCT/JP2012/056067

Publication Date:

September 13, 2012

Filing Date:

March 09, 2012

Export Citation:

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Assignee:

TOKAI CARBON KK (JP)
SEKIYAMA MAKOTO (JP)
SAITOH TETSUYA (JP)
KIRINO TOMOAKI (JP)

International Classes:

C09D17/00; C09C1/56

Domestic Patent References:

WO2007055084A1	2007-05-18
WO2007017999A1	2007-02-15

Foreign References:

JP2000309732A	2000-11-07
JPH10120958A	1998-05-12
JP2003183539A	2003-07-03
JPS4818186A
JPS57159856A	1982-10-02
JPH04189877A	1992-07-08

Other References: