Electrophotographic toner and image forming apparatus

Details Electrophotographic toner and image forming apparatus Electrophotographic toner and image forming apparatus

2005-01-10

2008-10-14

Dote, Janis L (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

C430S109400

Reexamination Certificate

active

07435519

ABSTRACT:
An electrophotographic toner comprising at least a fixing resin, a coloring agent, a release agent and a charge control agent, wherein the release agent is carnauba wax, the charge control agent is a boron complex of a salicylic acid derivative, and the fixing resin contains two kinds of polyester resins in ratio represented by the following equation (1);A⁡(T1/2)-A⁡(Tfb)B⁡(T1/2)-B⁡(Tfb)≦A⁡(T1/2)×CB⁡(T1/2)×D≦B⁡(T1/2)-B⁡(Tfb)A⁡(T1/2)-A⁡(Tfb),(1)wherein in the above equation, A(T1/2)−A(Tfb)<B(T1/2)−B(Tfb), A(T1/2) represents a softening point (° C.) of the polyester A, A(Tfb) a flow-out start point (° C.) of the polyester A, B(T1/2) a softening point (° C.) of the polyester B, B(Tfb) a flow-out start point (° C.) of the polyester B, C a weight rate of the polyester A in the fixing resin, and D a weight rate of the polyester B in the fixing resin.

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