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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