| US 7,563,555 B2 | ||
| Toner, developer including the toner, and method for fixing toner image | ||
| Yohichiroh Watanabe, Fuji (Japan); Masanori Suzuki, Suntoh-gun (Japan); Tsunemi Sugiyama, Numazu (Japan); Hiroshi Yamashita, Numazu (Japan); Takuya Saito, Numazu (Japan); Naohiro Watanabe, Suntoh-gun (Japan); Masami Tomita, Numazu (Japan); Shigeru Emoto, Numazu (Japan); Shinichiro Yagi, Numazu (Japan); Hiroshi Yamada, Numazu (Japan); Toshiki Nanya, Mishima (Japan); and Tadao Takigawa, Shinshiro (Japan) | ||
| Assigned to Ricoh Company Limited, Tokyo (Japan) | ||
| Filed on Jun. 27, 2006, as Appl. No. 11/475,165. | ||
| Application 11/475165 is a division of application No. 10/670320, filed on Sep. 26, 2003. | ||
| Claims priority of application No. 2002-281900 (JP), filed on Sep. 26, 2002; application No. 2002-333251 (JP), filed on Nov. 18, 2002; and application No. 2002-365782 (JP), filed on Dec. 17, 2002. | ||
| Prior Publication US 2006/0240349 A1, Oct. 26, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G03G 9/087 (2006.01) | ||
| U.S. Cl. 430—137.19 [430/108.1; 430/108.4; 430/109.4; 430/110.3] | 10 Claims |
| 1. A method for manufacturing a toner comprising toner particles, comprising:
dissolving or dispersing a toner composition, comprising
(i) at least a polyester prepolymer (A) having an isocyanate group, and being capable of reacting with an active hydrogen;
(ii) an amine (B) as a compound having an active hydrogen,
(iii) a second resin having a weight average molecular weight of from 2,000 to 10,000,
(iv) a colorant, and
(v) a release agent, in an organic solvent, to obtain an oil phase liquid;
dispersing the oil phase liquid in an aqueous medium comprising a particulate material while subjecting the polyester prepolymer
(A) to an addition polymerization reaction using said compound having said active hydrogen as a cross-linking agent, extending
agent or both, to prepare a urea-modified polyester resin and to prepare a dispersion;
removing at least the organic solvent from the dispersion to prepare the toner particles comprising a binder resin which comprises
said urea-modified polyester resin and said second resin having a weight average molecular weight of from 2,000 to 10,000;
washing the toner particles; and
drying the toner particles;
wherein said particulate material comprises a particulate resin which is crosslinked;
wherein said binder resin has a glass transition temperature of from 35° C. to below 55° C.;
wherein the particulate material is embedded into the surface of the toner particles;
wherein the particulate material has an average particle diameter of from 0.002 to 0.2 times that of the toner particles.
|