Aqueous Carbon Black Pigment and Aqueous Dispersion Thereof

• US 20090234063A1
• Filed: 05/29/2007
• Published: 09/17/2009
• Est. Priority Date: 06/02/2006
• Status: Abandoned Application

• Current Assignee: Tokai Carbon Company Limited
• Original Assignee: Tokai Carbon Company Limited
• Inventors: Sekiyama, Makoto
• Application Number:
  US12/227,007
• Publication Number:
  US 20090234063A1
• Time in Patent Office: Days
• US Class Current: 524/549
• CPC Class Codes: C09C 1/48 Carbon black
• CPC Class Codes: C09C 1/56 Treatment of carbon black ; Purification
• CPC Class Codes: 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
• CPC Class Codes: C09D 11/324 containing carbon black
• CPC Class Codes: C09D 17/005 Carbon black

Abstract

An aqueous carbon black pigment that is suitable for an inkjet printer ink and the like and ensures that a printed article exhibits excellent water resistance and fixability, and an aqueous dispersion of the aqueous carbon black pigment are disclosed. The aqueous carbon black pigment includes oxidized carbon black, a water-soluble resin, and an aqueous medium, the oxidized carbon black and the water-soluble resin being crosslinked in the aqueous medium using a water-dispersible crosslinking agent. The water-soluble resin is preferably a resin that contains acrylic acid and/or an acrylic acid derivative as a monomer unit, a resin that contains a maleic acid and/or a maleic acid derivative as a monomer unit, a resin that contains a styrene-acrylic acid copolymer as a main component, a resin that contains a styrene-maleic acid copolymer or a styrene-maleic anhydride copolymer as a main component, or the like. The water-dispersible crosslinking agent is preferably an isocyanate compound. A carbon black aqueous dispersion includes the aqueous carbon black pigment and an aqueous medium, the aqueous carbon black pigment being dispersed in the aqueous medium at a concentration suitable for the desired application.

Claims

1. An aqueous carbon black pigment comprising oxidized carbon black, a water-soluble resin, and an aqueous medium, the oxidized carbon black and the water-soluble resin being crosslinked in the aqueous medium using a water-dispersible crosslinking agent.

2. The aqueous carbon black pigment according to claim 1, wherein the water-soluble resin is a resin that contains an acrylic acid and/or an acrylic acid derivative as a monomer unit.

3. The aqueous carbon black pigment according to claim 1, wherein the water-soluble resin is a resin that contains a maleic acid and/or a maleic acid derivative as a monomer unit.

4. The aqueous carbon black pigment according to claim 1, wherein the water-soluble resin is a resin that contains a styrene-acrylic acid copolymer as a main component.

5. The aqueous carbon black pigment according to claim 1, wherein the water-soluble resin is a resin that contains a styrene-maleic acid copolymer or a styrene-maleic anhydride copolymer as a main component.

6. The aqueous carbon black pigment according to claim 1, wherein the water-dispersible crosslinking agent is an isocyanate compound.

7. A carbon black aqueous dispersion comprising the aqueous carbon black pigment according to claim 1 and an aqueous medium, the aqueous carbon black pigment being dispersed in the aqueous medium.