Oblon, McClelland, Maier & Neustadt, L.L.P.
Toner and image forming method
A toner containing colorant, releasing agent, and binder resin containing crystalline polyester resin, and non-crystalline polyester resin containing urethane bond, urea bond, or both, the non-crystalline polyester resin containing first and second non-crystalline polyester resins, both containing urethane bond, or urea bond, or both, wherein monomers constituting the first non-crystalline polyester resin contains isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, monomers constituting the second non-crystalline polyester resin contain isocyanate monomer for forming the urethane bond, the urea bond, or the both, in an amount of 0.5 mol % or greater to total amount of the monomers, the first non-crystalline polyester resin has Tg of −60° C. or higher but lower than 10° C., and the second non-crystalline polyester resin has Tg of 30° C. or higher but lower than 70° C.
Ricoh Company, Ltd.
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Daisuke Rintaro Tsuyoshi Susumu Hiroshi Tatsuru
Asahina Takahashi Sugimoto Chiba Yamashita Moritani