METHOD FOR PRODUCING WATER-BASE PIGMENT DISPERSION AND USE OF THE SAME

Title:

METHOD FOR PRODUCING WATER-BASE PIGMENT DISPERSION AND USE OF THE SAME

Document Type and Number:

Japanese Patent JP2002285067

Kind Code:

A

Abstract:

To provide a water-base pigment dispersion having good storage stability with time, settling property and filtering property, and to provide a pigment-type ink-jet recording liquid using the pigment dispersion, having nozzle discharge stability, a sufficient color-reproducibility range upon printing, and properties of good water resistance and light stability compatible with each other.

A method for producing water-base pigment dispersion comprises the steps of sulfonating a pigment in a strong acid to precipitate a sulfonic acid group-containing pigment derivative which has not formed salt, washing the sulfonic acid group-containing pigment derivative with an organic solvent, and dispersing the pigment in water using the washed sulfonic acid group- containing pigment derivative.

Inventors:

SUZUKI ERIKO
KAMIMURA TOSHIFUMI
KANEDA JUN

Application Number:

JP2001084509A

Publication Date:

October 03, 2002

Filing Date:

March 23, 2001

Export Citation:

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Assignee:

TOYO INK MFG CO

International Classes:

B41J2/01; B41M5/00; C09D11/00; C09D11/322; C09D11/40; C09D17/00; (IPC1-7): C09D17/00; B41J2/01; B41M5/00; C09D11/00

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