Invention Grant
- Patent Title: Resin fine particles, method of producing resin fine particles, method of producing resin particles, and method of producing toner
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Application No.: US15889585Application Date: 2018-02-06
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Publication No.: US10409180B2Publication Date: 2019-09-10
- Inventor: Shinnosuke Koji , Sakae Suda , Yusuke Kosaki , Shohei Fukuya , Tetsuya Kinumatsu , Kenji Aoki , Toshifumi Mori , Shuntaro Watanabe , Noritaka Toyoizumi , Atsushi Tani , Kazumichi Nakahama
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Venable LLP
- Priority: JP2017-024431 20170213; JP2017-247821 20171225
- Main IPC: G03G9/08
- IPC: G03G9/08 ; G03G9/087 ; C08F212/08 ; C08G63/195 ; C08G63/20 ; C08G81/02

Abstract:
A method of producing a toner including the steps of: mixing resin fine particles, an organic solvent, and a resin R with a dispersion medium containing carbon dioxide, to prepare a dispersion of resin R-containing droplets; and removing the organic solvent by flowing carbon dioxide, wherein the resin fine particles contain one or more resins that have a partial structure A, B, and C, and are soluble in chloroform; the SP value of the partial structure A, the resin R, and the partial structure B satisfy particular relationships; a resin A constituted of the partial structure A and a resin B constituted of the partial structure B are soluble in the organic solvent; and a resin C constituted of the partial structure C is insoluble in the organic solvent.
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