Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
Toner, image forming apparatus, image forming method, and process cartridge using the toner
The present invention provides a toner containing at least a binder resin, a releasing agent, and a colorant, wherein the binder resin contains at least a polyester resin (A) having a softening point Tm (A) of 120° C. to 160° C., a polyester resin (B) having a softening point Tm (B) of 80° C. or more and less than 120° C. and a composite resin (C) containing a condensation polymerization monomer and an addition polymerization monomer, at least any one of the polyester resins (A) and (B) is a polyester resin prepared by condensation-polymerizing an alcohol component substantially composed of only aliphatic alcohol with a carboxylic acid component, and 65% or more of the alcohol component is 1,2-propanediol.
Ricoh Company, Ltd.
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Hiroshi Shinya Tsuyoshi Junichi Akiyoshi Hiroshi Akihiro
Yamada Nakayama Sugimoto Awamura Sabu Yamashita Kotsugai