# US 2009/0260543 A1 · Carbon Black Aqueous Pigment and Method of Producing Aqueous Dispersion Thereof

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- Number: US 2009/0260543 A1
- Document ID: US20090260543A1
- Status: Published application
- Kind: A1
- Application number: 11/992,375
- Filed: 2006-10-05
- Published: 2009-10-22
- Earliest claimed: 2005-10-11
- Inventors: Hidenao Nakata; Hironori Arai
- Web page: https://patentgrep.com/patent/US20090260543A1

## CPC

- C09C 1/565: {comprising an oxidative treatment with oxygen, ozone or oxygenated compounds, e.g. when such treatment occurs in a region of the furnace next to the carbon black generating reaction zone}
- C09D 11/324: containing carbon black
- C09D 17/005: {Carbon black}
- C01P 2006/12: Surface area
- C01P 2006/19: Oil-absorption capacity, e.g. DBP values
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

A carbon black aqueous pigment which exhibits excellent water-dispersibility and ink performance, and a method of producing a carbon black aqueous dispersion are disclosed. The carbon black aqueous pigment includes carbon black A having a specific surface area by nitrogen adsorption of 150 m2/g or more, a DBP absorption of 95 cm3/100 g or more, and a tinting strength of 120% or more, and carbon black B having a specific surface area by nitrogen adsorption of less than 150 m2/g, a DBP absorption of less than 95 cm3/100 g, and a tinting strength of 120% or more, the carbon black A and the carbon black B being subjected to surface oxidation and neutralization, at least the carbon black A being atomized, and the carbon black A and the carbon black B being mixed in a weight ratio of 20:80 to 80:20. The method includes oxidizing the carbon black A and the carbon black B individually in an oxidizing agent aqueous solution, followed by neutralization, atomizing at least the carbon black A, purifying the carbon black A and the carbon black B, mixing the carbon black A and the carbon black B in a weight ratio of 20:80 to 80:20, and dispersing the mixture in an aqueous medium.

## Claims

### Claim 1

A carbon black aqueous pigment comprising carbon black A having a specific surface area by nitrogen adsorption (N2SA) of 150 m2/g or more, a DBP absorption of 95 cm3/100 g or more, and a tinting strength (Tint) of 120% or more, and carbon black B having a specific surface area by nitrogen adsorption (N2SA) of less than 150 m2/g, a DBP absorption of less than 95 cm3/100 g, and a tinting strength (Tint) of 120% or more, the carbon black A and the carbon black B being subjected to surface oxidation and neutralization, at least the carbon black A being atomized, and the carbon black A and the carbon black B being mixed in a weight ratio of 20:80 to 80:20.

### Claim 2

A method of producing a carbon black aqueous dispersion comprising providing carbon black A having a specific surface area by nitrogen adsorption (N2SA) of 150 m2/g or more, a DBP absorption of 95 cm3/100 g or more, and a tinting strength (Tint) of 120% or more, and carbon black B having a specific surface area by nitrogen adsorption (N2SA) of less than 150 m2/g, a DBP absorption of less than 95 cm3/100 g, and a tinting strength (Tint) of 120% or more, oxidizing the carbon black A and the carbon black B individually in an oxidizing agent aqueous solution, followed by neutralization, atomizing at least the carbon black A, purifying the carbon black A and the carbon black B, mixing the carbon black A and the carbon black B in a weight ratio of 20:80 to 80:20, and dispersing the mixture in an aqueous medium.