Magnetic toner, image forming method, surface-modified fine sili

Details Magnetic toner, image forming method, surface-modified fine sili Magnetic toner, image forming method, surface-modified fine sili

1994-08-19

1996-01-02

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

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

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

430110, 430111, G03G 9083

Patent

active

054807557

ABSTRACT:
A magnetic toner has magnetic resin particles containing at least a binder resin, a charge control agent and a magnetic powder. The surface-modified fine silica powder being a fine silica powder has been treated with a hydrophobicizing agent. The fine silica powder has a specific surface area of not less than 180 m.sup.2 /g, a hydrophobicity of from 60% to 95% and a bulk density of from 35 g/lit. to 49 g/lit.

REFERENCES:
patent: 4702986 (1987-10-01), Imai et al.
patent: 4857432 (1989-08-01), Tanikawa et al.
patent: 5041351 (1991-08-01), Kitamori et al.

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