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. 18, 2018
Filed:
Jun. 14, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Kenji Aoki, Numazu, JP;
Yusuke Kosaki, Susono, JP;
Noritaka Toyoizumi, Mishima, JP;
Tetsuya Kinumatsu, Mishima, JP;
Toshifumi Mori, Tokyo, JP;
Sakae Suda, Yokohama, JP;
Shinnosuke Koji, Yokohama, JP;
Shuntaro Watanabe, Hadano, JP;
Kazumichi Nakahama, Suntou-gun, JP;
Atsushi Tani, Tokyo, JP;
Takashige Kasuya, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for producing a toner particle include: (a) mixing a binder resin A, resin fine particles containing a resin B, a resin C, an organic solvent, and carbon dioxide, thereby forming a droplet of a resin solution containing the binder resin A, covered with the resin fine particles; (b) applying a pressure by introducing carbon dioxide, thereby precipitating the resin C at the surface of the droplet; and (c) passing carbon dioxide so as to remove the organic solvent from the droplet with the carbon dioxide. The resin C has an organic polysiloxane structure and a weight average molecular weight of 50,000 to 500,000. The ratio of the weight average molecular weight to the number average molecular weight of the resin C is not more than 5.0. The proportion of the resin C to the rein fine particles is 5.0% by mass to 50.0% by mass.