Title:
DISAZO PIGMENT AND INK COMPOSITION USING THE SAME
Document Type and Number:
Japanese Patent JP2020172566
Kind Code:
A
Abstract:
To provide a disazo pigment excellent in all of light fastness, hue, transparency and fluidity, and an ink composition using the pigment.SOLUTION: The disazo pigment is obtained by continuously injecting a tetrazo solution containing a tetrazo component of benzidine and a coupler solution containing a coupler component into an acidic aqueous solution through the following steps (A) to (C). In step (A), a 2',4'-dimethyl acetoacetanilide solution and the tetrazo solution are subjected to a coupling reaction to form a disazo pigment; in step (B), a coupler solution represented by general formula (1) CH3COCH2CONH-X and the tetrazo solution are subjected to a coupling reaction to form a disazo pigment; and in step (C), a solution of acetoacetanilide and a coupler component represented by general formula (2) CH3COCH2CONH-Y, and the tetrazo solution are subjected to a coupling reaction to form disazo pigment particles.SELECTED DRAWING: None
Inventors:
YAMAMOTO YUMIKA
INAI TEPPEI
OCHIAI YOSHIE
OKAMOTO SHINPEI
INAI TEPPEI
OCHIAI YOSHIE
OKAMOTO SHINPEI
Application Number:
JP2019073866A
Publication Date:
October 22, 2020
Filing Date:
April 09, 2019
Export Citation:
Assignee:
TOYO INK SC HOLDINGS CO LTD
International Classes:
C09B35/035; C09B67/20; C09D11/037; C09D11/101