Invention Grant
- Patent Title: Charge control agent, toner and toner producing method
- Patent Title (中): 充电控制剂，调色剂和调色剂生产方法
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Application No.: US11779648Application Date: 2007-07-18
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Publication No.: US07709171B2Publication Date: 2010-05-04
- Inventor: Atsushi Yamamoto , Chiyoshi Nozaki , Tsuyoshi Nozaki , Mitsuyo Matsumoto , Katsunori Kurose
- Applicant: Atsushi Yamamoto , Chiyoshi Nozaki , Tsuyoshi Nozaki , Mitsuyo Matsumoto , Katsunori Kurose
- 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: JP2006-211457 20060802
- Main IPC: G03G9/097
- IPC: G03G9/097
Abstract:
The present invention provides a charge control agent, adapted to control charging ability of resins or compositions containing resins, comprising a copolymer that comprises a polymer block A and a polymer block B, the polymer block A is prepared by copolymerizing a maleimide, which being unsubstituted or substituted for a hydrogen atom of an imide group by an electron-donating group, and styrene or a styrene derivative, and the polymer block B is formed of a polymer of styrene or a styrene derivative.
Public/Granted literature
- US20080032223A1 CHARGE CONTROL AGENT, TONER AND TONER PRODUCING METHOD Public/Granted day:2008-02-07
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