- Patent Title: Methods for producing toner particle and producing resin particle
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Application No.: US15623161Application Date: 2017-06-14
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Publication No.: US10078280B2Publication Date: 2018-09-18
- Inventor: Kenji Aoki , Yusuke Kosaki , Noritaka Toyoizumi , Tetsuya Kinumatsu , Toshifumi Mori , Sakae Suda , Shinnosuke Koji , Shuntaro Watanabe , Kazumichi Nakahama , Atsushi Tani , Takashige Kasuya
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A. Inc., IP Division
- Priority: JP2016-120400 20160617
- Main IPC: G03G9/08
- IPC: G03G9/08 ; G03G9/087 ; C08F230/08

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.
Public/Granted literature
- US20170363979A1 METHODS FOR PRODUCING TONER PARTICLE AND PRODUCING RESIN PARTICLE Public/Granted day:2017-12-21
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