Invention Grant
- Patent Title: Toner and image forming method
- Patent Title (中): 调色剂和成像方法
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Application No.: US13709746Application Date: 2012-12-10
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Publication No.: US09034548B2Publication Date: 2015-05-19
- Inventor: Tatsuru Moritani , Hiroshi Yamashita , Tsuyoshi Sugimoto , Daisuke Asahina , Rintaro Takahashi , Susumu Chiba
- Applicant: Ricoh Company, Ltd.
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-273351 20111214
- Main IPC: G03G9/00
- IPC: G03G9/00 ; G03G9/087 ; G03G13/00 ; G03G9/093

Abstract:
A toner containing colorant, releasing agent, and binder resin containing crystalline polyester resin, and non-crystalline polyester resin containing urethane bond, urea bond, or both, the non-crystalline polyester resin containing first and second non-crystalline polyester resins, both containing urethane bond, or urea bond, or both, wherein monomers constituting the first non-crystalline polyester resin contains isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, monomers constituting the second non-crystalline polyester resin contain isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, the first non-crystalline polyester resin has Tg of −60° C. or higher but lower than 10° C., and the second non-crystalline polyester resin has Tg of 30° C. or higher but lower than 70° C.
Public/Granted literature
- US20130157193A1 TONER AND IMAGE FORMING METHOD Public/Granted day:2013-06-20
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