Invention Grant
- Patent Title: Magnetic toner
- Patent Title (中): 磁性调色剂
-
Application No.: US14364640Application Date: 2013-01-31
-
Publication No.: US09097997B2Publication Date: 2015-08-04
- Inventor: Shotaro Nomura , Michihisa Magome , Yusuke Hasegawa , Takashi Matsui
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper and Scinto
- Priority: JP2012-019520 20120201
- International Application: PCT/JP2013/052780 WO 20130131
- International Announcement: WO2013/115409 WO 20130808
- Main IPC: G03G9/083
- IPC: G03G9/083 ; G03G9/097 ; G03G9/087

Abstract:
A magnetic toner is provided that exhibits an excellent electrostatic offset resistance both initially and after long-term use. The magnetic toner contains: magnetic toner particles containing a binder resin and a magnetic body; and inorganic fine particles present on the surface of the magnetic toner particles, wherein the inorganic fine particles present on the surface of the magnetic toner particles contain a prescribed metal oxide fine particle in a prescribed proportion; the magnetic toner has prescribed numerical value ranges for a coverage ratio A of the magnetic toner particle surface covered by the inorganic fine particles and for a coverage ratio B by the inorganic fine particles that are fixed to the magnetic toner particle surface; the magnetic toner particle contains a crystalline polyester; and measurement of the magnetic toner with a differential scanning calorimeter provides a characteristic differential scanning calorimetric curve.
Public/Granted literature
- US20140335450A1 MAGNETIC TONER Public/Granted day:2014-11-13
Information query