Electrophotographic dry toner and process for producing the same

Details Electrophotographic dry toner and process for producing the same Electrophotographic dry toner and process for producing the same

1992-10-13

1995-01-03

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

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

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

430903, G03G 908

Patent

active

053785720

ABSTRACT:
An electrophotographic dry toner comprising a binder resin and a colorant, having externally added thereto an inorganic compound, preferably spherical silica particles, having been surface treated with at least one treating agent selected from the group consisting of a treating agent selected from a polyethylene, a fatty acid metal salt, and a solid alcohol containing from 20 to 60 carbon atoms. The toner is prepared by treating the inorganic compound with a dispersion or a solution of the treating agent in a solvent and adding the thus surface-treated inorganic compound to a toner. The toner exhibits satisfactory fluidity, satisfactory cleanability, excellent environmental stability, and excellent durability and causes no toner filming phenomenon on a photoreceptor, a carrier used in a two-component developer system, or a charging part used in a one-component developer system.

REFERENCES:
patent: 4920023 (1990-04-01), Koch et al.
patent: 4965158 (1990-10-01), Gruber et al.
patent: 5155000 (1992-10-01), Matsumura et al.
patent: 5194357 (1993-03-01), Hodgson

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