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:
Sep. 01, 2015
Filed:
Mar. 13, 2013
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Chuo-ku, Tokyo, JP;
Kyoto University, Kyoto-shi, Kyoto, JP;
Hiroyuki Shimanaka, Tokyo, JP;
Taiyo Aoyagi, Tokyo, JP;
Yoshikazu Murakami, Tokyo, JP;
Sachio Yoshikawa, Tokyo, JP;
Naoyuki Sakai, Tokyo, JP;
Atsushi Goto, Uji, JP;
Yoshinobu Tsujii, Uji, JP;
Takeshi Fukuda, Uji, JP;
DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., Tokyo, JP;
KYOTO UNIVERSITY, Kyoto, JP;
Abstract
Disclosed are an aqueous pigment dispersion containing at least a pigment, water, a high-molecular dispersant, and an alkali. The high-molecular dispersant is a diblock polymer having a formula (1) of A-B or a triblock polymer having a formula (2) of A-B-C. The diblock or triblock polymer is a diblock or triblock polymer obtained by polymerizing addition-polymerizable monomers with a radical generator while using an organic iodide as a polymerization initiating compound and an organic phosphorus compound, organic nitrogen compound or organic oxygen compound as a catalyst. Also disclosed are a production method and use of the aqueous pigment dispersion. With the high-molecular dispersant obtained by a simple living radical polymerization process free of the problems of conventional living radical polymerization and having a precisely-controlled molecular structure, the aqueous pigment dispersion can be obtained with the pigment dispersed in it.