Invention Grant
- Patent Title: Process for preparing toner for electrophotography
- Patent Title (中): 制备电子照相用调色剂的方法
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Application No.: US11199220Application Date: 2005-08-09
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Publication No.: US07887983B2Publication Date: 2011-02-15
- Inventor: Shinichi Sata , Yoshinobu Ishikawa , Nobumichi Kamiyoshi
- Applicant: Shinichi Sata , Yoshinobu Ishikawa , Nobumichi Kamiyoshi
- Applicant Address: JP Tokyo
- Assignee: Kao Corporation
- Current Assignee: Kao Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2004-262910 20040909
- Main IPC: G03G9/087
- IPC: G03G9/087

Abstract:
The present invention relates to a process for preparing a toner for electrophotography containing a resin binder and a colorant, including the step of preparing fine particles of the resin binder to have a volume-median particle size (D50) of from 0.05 to 3 μm in an aqueous medium in the presence of a nonionic surfactant within a temperature range of from 10° C. below to 10° C. above a cloud point of the nonionic surfactant; and a toner for electrophotography obtained by the process as defined above, wherein the toner contains 60% by weight or more of a crystalline polyester and has a volume-median particle size (D50) of from 1 to 7 μm. The toner obtained according to the process of the present invention can be suitably used, for example, in development of a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method, or the like.
Public/Granted literature
- US20060051693A1 Process for preparing toner for electrophotography Public/Granted day:2006-03-09
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