Toner and image forming method
First Claim
1. A toner, comprising:
- toner particles each comprising a binder resin and a colorant, and inorganic fine powder A, whereinthe inorganic fine powder A contains 88.0-97.0 wt. % of a rare earth compound comprising a rare earth oxide,the rare earth compound contains 40.0-65.0 wt. % of Ce (calculated as CeO2), 25.0-45.0 wt. % of La (calculated as La2 O3), 1.0-10.0 wt. % of Nd (calculated as Nd2 O3) and 1.0-10.0 wt. % of Pr (calculated as Pr6 O11), andthe rare earth compound contains a fluorinated rare earth compound in such an amount as to provide the inorganic fine powder A with a fluorine content of 2.0-11.0 wt. %.
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Accused Products
Abstract
An electrophotographic toner showing good cleanability and is suitable for use in developing an electrostatic latent image formed on an amorphous-silicon photosensitive member is provided. The toner includes toner particles each comprising a binder resin and a colorant, and inorganic fine powder A. The inorganic fine powder A contains 88.0-97.0 wt. % of a rare earth compound comprising a rare earth oxide. The rare earth compound contains 40.0-65.0 wt. % of Ce (calculated as CeO2), 25.0-45.0 wt. % of La (calculated as La2 O3), 1.0-10.0 wt. % of Nd (calculated as Nd2 O3) and 1.0-10.0 wt. % of Pr (calculated as Pr6 O11). The rare earth compound contains further a fluorinated rare earth compound in such an amount as to provide the inorganic fine powder A with a fluorine content of 2.0-11.0 wt. %.
53 Citations
35 Claims
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1. A toner, comprising:
- toner particles each comprising a binder resin and a colorant, and inorganic fine powder A, wherein
the inorganic fine powder A contains 88.0-97.0 wt. % of a rare earth compound comprising a rare earth oxide, the rare earth compound contains 40.0-65.0 wt. % of Ce (calculated as CeO2), 25.0-45.0 wt. % of La (calculated as La2 O3), 1.0-10.0 wt. % of Nd (calculated as Nd2 O3) and 1.0-10.0 wt. % of Pr (calculated as Pr6 O11), and the rare earth compound contains a fluorinated rare earth compound in such an amount as to provide the inorganic fine powder A with a fluorine content of 2.0-11.0 wt. %. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- toner particles each comprising a binder resin and a colorant, and inorganic fine powder A, wherein
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15. An image forming method, comprising:
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a charging step of charging an image-bearing member, an image forming step of forming an electrostatic image on the charged image-bearing member, a developing step of developing the electrostatic image with a toner to form a toner image on the image-bearing member, a transfer step of transferring the toner image onto a recording material via or without via an intermediate transfer member, a fixing step of heat-fixing the toner image onto the recording material, and a cleaning step of cleaning a surface of the image bearing member after transfer of the toner image;
whereinthe toner comprises toner particles each comprising a binder resin and a colorant, and inorganic fine powder A, the inorganic fine powder A contains 88.0-97.0 wt. % of a rare earth compound comprising a rare earth oxide, the rare earth compound contains 40.0-65.0 wt. % of Ce (calculated as CeO2), 25.0-45.0 wt. % of La (calculated as La2 O3), 1.0-10.0 wt. % of Nd (calculated as Nd2 O3) and 1.0-10.0 wt. % of Pr (calculated as Pr6 O11), and the rare earth compound contains a fluorinated rare earth compound in such an amount as to provide the inorganic fine powder A with a fluorine content of 2.0-11.0 wt. %. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification