Invention Grant
- Patent Title: Toner, developer, and image forming apparatus
- Patent Title (中): 调色剂,显影剂和成像装置
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Application No.: US13728060Application Date: 2012-12-27
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Publication No.: US08735040B2Publication Date: 2014-05-27
- Inventor: Suzuka Amemori , Masahide Yamada , Yoshihiro Moriya , Taichi Nemoto , Yukiko Nakajima , Yoshitaka Yamauchi , Daiki Yamashita , Keiji Makabe , Akiyoshi Sabu
- Applicant: Suzuka Amemori , Masahide Yamada , Yoshihiro Moriya , Taichi Nemoto , Yukiko Nakajima , Yoshitaka Yamauchi , Daiki Yamashita , Keiji Makabe , Akiyoshi Sabu
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-288511 20111228
- Main IPC: G03G9/087
- IPC: G03G9/087

Abstract:
To provide a toner including at least a binder resin and a colorant, wherein the binder resin has two glass transition temperatures Tg1 and Tg2 in a differential scanning calorimetry at a heating speed of 5° C./min, the glass transition temperature Tg1 is −20° C. to 20° C., and the glass transition temperature Tg2 is 35° C. to 65° C., wherein the binder resin comprises a polyester skeleton and a ring-containing skeleton molecule at ends thereof, and wherein the binder resin is obtained by block copolymerization of: a polyester skeleton A which includes a structural unit obtained by dehydration condensation of a hydroxycarboxylic acid in a repeating structure; and a skeleton B which does not include a structural unit obtained by dehydration condensation of a hydroxycarboxylic acid in a repeating structure.
Public/Granted literature
- US20130171550A1 TONER, DEVELOPER, AND IMAGE FORMING APPARATUS Public/Granted day:2013-07-04
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