| US 7,364,828 B2 | ||
| Toner for electrophotography, method of manufacturing the toner, developer, development method, transfer method, and process cartridge using the toner | ||
| Hiroshi Yamashita, Shizuoka (Japan); Takuya Saito, Shizuoka (Japan); Tsunemi Sugiyama, Shizuoka (Japan); and Yohichiroh Watanabe, Shizuoka (Japan) | ||
| Assigned to Ricoh Company, Ltd., Tokyo (Japan) | ||
| Filed on Jan. 10, 2006, as Appl. No. 11/328,280. | ||
| Application 11/328280 is a division of application No. 10/623522, filed on Jul. 22, 2003, granted, now 7,074,541. | ||
| Claims priority of application No. 2002-214493 (JP), filed on Jul. 23, 2002. | ||
| Prior Publication US 2006/0127788 A1, Jun. 15, 2006 | ||
| Int. Cl. G03G 9/087 (2006.01) | ||
| U.S. Cl. 430—109.1 [430/105] | 16 Claims |
| 1. A toner for electrophotography obtained by a method comprising
dissolving or dispersing a toner composition comprising a resin and a coloring agent into polymerizable monomers to provide
a solution or a dispersed system,
emulsifying the solution or the dispersed system with a first surface active agent in an aqueous medium to provide an emulsion,
and
polymerizing the polymerizable monomers in the emulsion to obtain toner, wherein
a second surface active agent having polarity opposite to polarity of the first surface active agent is added after the emulsifying
step, and
wherein the second surface active agent is adsorbed on a surface of a particle of the toner.
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