Title:
AZO LAKE PIGMENT COMPOSITION, METHOD FOR PRODUCING THE SAME AND PRINTING INK COMPOSITION
Document Type and Number:
Japanese Patent JP3914133
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an azo lake pigment composition useful for various coloring applications, affording an ink having excellent heat resistance, transparency, tinting strength, fluidity, or the like, when used for preparing, e.g. a printing ink, having a bright hue and scarcely coloring wastewater during flushing.
SOLUTION: The azo lake pigment is obtained by coupling a diazonium salt of an aromatic amine having a water-soluble group with β-naphthol or β-oxynaphthoic acid and carrying out laking after or simultaneously with the coupling. The azo lake pigment is prepared by substituting a part of the aromatic amine with an aniline derivative having a sulfonic acid group and an amide group or a sulfonamide group such as 4-amino-phthalimide-5-sulfonic acid or N',N'-diethyl-3-amino-4-methoxy-benzenesulfonamide-6-sulfonic acid.
Inventors:
Terada Toshitaka
Shunko Kobayashi
Hideki Ito
Kogusu Katsumi
Naomi Takami
Shunko Kobayashi
Hideki Ito
Kogusu Katsumi
Naomi Takami
Application Number:
JP2002306601A
Publication Date:
May 16, 2007
Filing Date:
October 22, 2002
Export Citation:
Assignee:
Dainichi Seika Kogyo Co., Ltd.
International Classes:
C09B63/00; C09B29/20; C09B67/20; C09D11/02; C09D11/037; (IPC1-7): C09B63/00; C09B67/20; C09D11/02
Domestic Patent References:
| JP9111142A |
Attorney, Agent or Firm:
Katsuhiro Yoshida
Toshieko Kondo
Hiroshi Yoshida
Toshieko Kondo
Hiroshi Yoshida