CYAN DYE MIXTURE, WATER-BASED CYAN INK COMPOSITION, AND METHOD OF INK-JET RECORDING

Title:

CYAN DYE MIXTURE, WATER-BASED CYAN INK COMPOSITION, AND METHOD OF INK-JET RECORDING

Document Type and Number:

WIPO Patent Application WO/2002/008340

Kind Code:

A1

Abstract:

A cyan dye mixture; an ink composition containing the mixture; and a method of ink-jet recording with the ink composition. The print obtained by the method is characterized by discoloring or fading little even when allowed to stand in a well ventilated shade or in an ozone gas. The cyan dye mixture comprises compounds which are obtained by chlorosulfonating, as a starting material, copper phthalocyanine or a sulfonated copper phthalocyanine and then aminating the chlorosulfonation product with an aminating agent used in an amount of at least 2.5 mol per mol of the starting material, and which are represented by the following formula (1): (1) wherein M represents a proton, alkali metal ion, alkaline earth metal ion, onium ion of an organic amine, or ammonium ion; m is an integer of 1 to 4; and n is an integer of 0 to 3; provided that m+n is an integer of 1 to 4.

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Inventors:

KITAYAMA HIROKAZU (JP)
NAMBA SHINICHI (JP)
FUJII TAKAFUMI (JP)
OTANI JUNJI (JP)
YOSHIOKA JUNKO (JP)
SHIRASAKI YASUO (JP)

Application Number:

PCT/JP2001/006403

Publication Date:

January 31, 2002

Filing Date:

July 25, 2001

Export Citation:

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Assignee:

NIPPON KAYAKU KK (JP)
KITAYAMA HIROKAZU (JP)
NAMBA SHINICHI (JP)
FUJII TAKAFUMI (JP)
OTANI JUNJI (JP)
YOSHIOKA JUNKO (JP)
SHIRASAKI YASUO (JP)

International Classes:

C09B47/26; C09B67/22; C09D11/00; (IPC1-7): C09B47/26; B41J2/01; B41M5/00; C09D11/00

Foreign References:

JPH07138511A	1995-05-30
JPS62190273A	1987-08-20

Other References: