Invention Grant
- Patent Title: Toner and developer
- Patent Title (中): 墨粉和开发商
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Application No.: US13336318Application Date: 2011-12-23
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Publication No.: US08592117B2Publication Date: 2013-11-26
- Inventor: Tsuyoshi Sugimoto , Hiroshi Yamashita , Daisuke Asahina , Masaki Watanabe , Satoyuki Sekiguchi , Rintaro Takahashi
- Applicant: Tsuyoshi Sugimoto , Hiroshi Yamashita , Daisuke Asahina , Masaki Watanabe , Satoyuki Sekiguchi , Rintaro Takahashi
- 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: JP2011-011624 20110124; JP2011-260175 20111129
- Main IPC: G03G9/00
- IPC: G03G9/00

Abstract:
A toner including: a binder resin component; crystal nucleating agent; releasing agent; and colorant, wherein the binder resin component contains a crystalline polyester resin and a non-crystalline polyester resin, the crystal nucleating agent is at least one of an aliphatic ester compound and an aliphatic amide compound each having a melting point of 60° C. or higher but lower than 150° C., and wherein the toner satisfies Expressions (I) and (II): Tc>Tp+10 Expression (I) Tm>Tp+2 Expression (II) where Tp denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve obtained DSC of the crystalline polyester resin, Tc denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve obtained DSC of the crystal nucleating agent, and Tm denotes lowest exothermic peak temperature [° C.] in 0° C. to 200° C. in DSC curve through DSC of the mixture of the crystalline polyester resin and the crystal nucleating agent.
Public/Granted literature
- US20120189951A1 TONER AND DEVELOPER Public/Granted day:2012-07-26
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