Toner for electrophotography and process for preparation thereof

Details Toner for electrophotography and process for preparation thereof Toner for electrophotography and process for preparation thereof

1989-12-28

1991-12-31

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

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

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

430110, 430111, 430137, G03G 900, G03G 500

Patent

active

050771680

ABSTRACT:
Disclosed is a toner for the electrophotography, which comprises as a main component a styrene/acrylic copolymer having at least two molecular weight distribution peaks, the molecular weight (Mw) of the peak on the lowest molecular weight side being lower than 13000, wherein the toner contains a charge controlling agent dispersed therein at a concentration of at least 0.3% by weight and the charge controlling agent has such a particle size distribution that the area ratio of particles having a particle size larger than 2.5 .mu.m is at least 80% based on the section of the toner. If this toner is used, the fixing-possible temperature can be broadened while increasing the fixing ratio without reduction of the performances of the toner.

REFERENCES:
patent: 4433040 (1984-02-01), Niimura et al.
patent: 4624907 (1986-11-01), Niimura et al.
patent: 4626488 (1986-12-01), Inoue
patent: 4824751 (1989-04-01), Matuura et al.

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