Title:
METHOD FOR PRODUCING AZO PIGMENT
Document Type and Number:
WIPO Patent Application WO/2012/133612
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for producing an azo pigment whereby the aromatic amines that are included in pigment can be reduced and thereby will have a negative Ames test and have excellent coloring power and brilliance. Provided is a method for producing an azo pigment in which a coupling component is coupled with a diazo component may by diazotizing an aromatic amine, the method being characterized in that a solution containing the coupler component is heated to a temperature of 70 to 100°C for 0.1 to 10 minutes.
Inventors:
KOBAYASHI RYOSAKU (JP)
SUGAMO HITOSHI (JP)
MOCHIZUKI AKIMITSU (JP)
SUGAMO HITOSHI (JP)
MOCHIZUKI AKIMITSU (JP)
Application Number:
PCT/JP2012/058298
Publication Date:
October 04, 2012
Filing Date:
March 29, 2012
Export Citation:
Assignee:
TOYO INK SC HOLDINGS CO LTD (JP)
KOBAYASHI RYOSAKU (JP)
SUGAMO HITOSHI (JP)
MOCHIZUKI AKIMITSU (JP)
KOBAYASHI RYOSAKU (JP)
SUGAMO HITOSHI (JP)
MOCHIZUKI AKIMITSU (JP)
International Classes:
C09B41/00; C09B29/20; C09B33/04; C09B67/20; C09B67/42; C09D11/00
Foreign References:
| JP2000191935A | 2000-07-11 | |||
| JP2003149869A | 2003-05-21 | |||
| JP2002038043A | 2002-02-06 | |||
| JP2008050418A | 2008-03-06 |
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (JP)
Hidekazu Miyoshi (JP)
Hidekazu Miyoshi (JP)
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Claims: