| US 7,524,600 B2 | ||
| Electrophotographic toner | ||
| Tomoko Toizumi, Nara (Japan); Yoshiaki Akazawa, Nara (Japan); Satoshi Ogawa, Nara (Japan); Masao Suzuki, Yamatokoriyama (Japan); Akio Matsumoto, Nara (Japan); Hiroshi Onda, Yamatokoriyama (Japan); Kiyoshi Toizumi, Nara (Japan); Toshihisa Ishida, Kashiba (Japan); Tadayuki Sawai, Nara (Japan); Kouji Kida, Nara (Japan); Tohru Nishikawa, Yamatokoriyama (Japan); and Masahiko Kubo, Nara (Japan) | ||
| Assigned to Sharp Kabushiki Kaisha, Osaka (Japan) | ||
| Filed on Feb. 07, 2006, as Appl. No. 11/348,398. | ||
| Claims priority of application No. P2005-033569 (JP), filed on Feb. 09, 2005; and application No. P2005-051247 (JP), filed on Feb. 25, 2005. | ||
| Prior Publication US 2006/0177755 A1, Aug. 10, 2006 | ||
| Int. Cl. G03G 9/097 (2006.01) | ||
| U.S. Cl. 430—108.3 [430/108.8; 430/109.4; 430/108.1] | 12 Claims |
| 1. An electrophotographic toner comprising at least:
a binder resin;
a colorant;
a charge controller; and
a wax,
wherein the binder resin is a polyester resin having an aromatic alcohol ingredient, the charge controller is an organic bentonite
and the wax consists of a non-polar paraffin wax as a wax,
wherein a volume average particle size D50 of the organic bentonite is within the range of 2 to 9 μm, and
wherein the organic bentonite has a salt structure comprising an alkaline bentonite and an organic cation.
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