AZO LAKE PIGMENT COMPOSITION AND PREPARATION THEREOF

Japanese Patent JP3272949

B2

PROBLEM TO BE SOLVED: To obtain an azo lake pigment compsn. which, when used in a printing ink, can offer an ink possessing heat resistance, transparency, sharpness, tinting strength, fluidity and other properties by using a compound prepd. by substituting a part of a diazonium component in an azo lake pigment by a specific compd.
SOLUTION: This azo lake pigment compsn. is prepd. by coupling a diazonium salt of an aniline deriv. having a water-soluble group with β-naphthol or β-oxynaphthoic acid and conducting laking after or simultaneously with the coupling. This azo lake pigment is one prepd. by substituting 0.1 to 30mol% of an aniline deriv. by a compd. represented by the formula (wherein X represents a sulfonic acid group; (m)>2 Y represents H, a halogen, or an alkyl, alkoxy, acetyl, hydroxyl, or aryl group; and (n) is 1 to 3) to prepare a mixed diazo component and then conducting coupling and laking.

JP2015193744	METHOD FOR SUPPRESSING REDUCTION OF VISCOSITY OF INK COMPOSITION
WO/2005/097914	PIGMENT COMPOSITIONS FOR INKS WITH IMPROVED RHEOLOGY
WO/1995/023190	METHOD FOR THE PRODUCTION OF PIGMENTS AND PIGMENTS PRODUCED ACCORDING TO THE METHOD

Naonori Takami
Kenichi Tanaka
Toshitaka Terada
Masahiro Takayama

JP14783596A

April 08, 2002

May 20, 1996

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Dainichi Seika Kogyo Co., Ltd.

C09B63/00; C09B67/20; C09B67/22; C09D11/02; C09D11/033; C09D11/037; (IPC1-7): C09B63/00; C09B67/20; C09B67/22; C09D11/02

JP9111142A
JP5132632A
JP397762A
JP617367A
JP636060A
JP6509370A

Katsuhiro Yoshida (1 person outside)

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