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:
Jul. 25, 2017
Filed:
Mar. 30, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Kosuke Mukumoto, Yokohama, JP;
Yasuaki Murai, Kawasaki, JP;
Yuki Hasegawa, Yokohama, JP;
Takayuki Toyoda, Yokohama, JP;
Ayano Mashida, Kawasaki, JP;
Waka Hasegawa, Tokyo, JP;
Chiaki Nishiura, Kawasaki, JP;
Masanori Seki, Yokohama, JP;
Masashi Hirose, Machida, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided are a method of producing a compound having a colorant structure suitable for a pigment dispersant, and a pigment dispersant, a pigment composition, a pigment dispersion, and a toner each containing the compound. The production method is a method of producing a compound in which a polymer portion and a colorant portion are bonded to each other through a linking group, the method including the steps of: (a) polymerizing a vinyl-based polymerizable monomer represented by the formula (A) with a radical initiator having a protective group by living radical polymerization to provide a polymer having the protective group at a terminal thereof; (b) hydrolyzing the protective group of the polymer having the protective group at a terminal thereof obtained by the step (a) to deprotect the polymer; and (c) bonding the deprotected polymer obtained by the step (b) and a colorant to each other through a covalent bond.