The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2015
Filed:
Mar. 05, 2013
Applicant:
Hodogaya Chemical Co., Ltd., Tokyo, JP;
Inventors:
Atsushi Takesue, Tokyo, JP;
Yoshihiko Abe, Tokyo, JP;
Hideyuki Otsuka, Tokyo, JP;
Jun Watanabe, Tokyo, JP;
Shunsuke Saitoh, Tokyo, JP;
Kanae Hiraishi, Tokyo, JP;
Assignee:
HODOGAYA CHEMICAL CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B 45/01 (2006.01); C07F 15/02 (2006.01); C07C 245/10 (2006.01);
U.S. Cl.
CPC ...
C07F 15/025 (2013.01); C09B 45/01 (2013.01); C07C 245/10 (2013.01);
Abstract
A process for producing a charge control agent comprising an azo-based iron complex salt compound as an effective component, comprises: The ironization reaction of the monoazo compound is carried out while pH is kept at 7.0 to 8.0. Since the above azo-based iron complex salt compound having high purity can be obtained at a high yield, it can be used as a charge control agent directly and a special purification step can be eliminated, thereby making it possible to greatly cut the production cost.