Invention Grant
US08110332B2 Electrophotographic toner and method for producing the electrophotographic toner
有权
电子照相调色剂和用于制备电子照相调色剂的方法
- Patent Title: Electrophotographic toner and method for producing the electrophotographic toner
- Patent Title (中): 电子照相调色剂和用于制备电子照相调色剂的方法
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Application No.: US12036706Application Date: 2008-02-25
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Publication No.: US08110332B2Publication Date: 2012-02-07
- Inventor: Kazumi Suzuki , Yohichiroh Watanabe , Takahiro Honda , Yoshihiro Norikane , Shinji Ohtani , Tsuyoshi Sugimoto
- Applicant: Kazumi Suzuki , Yohichiroh Watanabe , Takahiro Honda , Yoshihiro Norikane , Shinji Ohtani , Tsuyoshi Sugimoto
- 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: JP2007-049530 20070228; JP2007-262899 20071009
- Main IPC: G03G9/08
- IPC: G03G9/08

Abstract:
Provided are an electrophotographic toner and a method for producing the electrophotographic toner that satisfy high image quality, cleaning stability, and high productivity.The electrophotographic toner is produced by spray-drying a toner ingredient-containing liquid, wherein the toner ingredient-containing liquid dissolves or disperses at least a resin, a low molecular mass organic material, and a colorant in an organic solvent, the resin is soluble in the organic solvent, the low molecular mass organic material is a crystalline compound or a composition of crystalline compounds that is soluble in the organic solvent, the toner ingredient-containing liquid contains substantially no particles having a particle diameter of 500 nm or more, the crystalline compound or the composition of crystalline compounds crystallizes upon spray-drying to deform toner particles into a circularity of 0.93 or higher to 0.98 or less, and volume average particle diameter of the toner particles is 3.0 μm or higher to less than 7.0 μm.
Public/Granted literature
- US20080292985A1 ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE ELECTROPHOTOGRAPHIC TONER Public/Granted day:2008-11-27
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