Toner for developing electrostatic images and process for produc

Details Toner for developing electrostatic images and process for produc Toner for developing electrostatic images and process for produc

1998-03-31

1999-01-05

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, 430137, G03G 909

Patent

active

058560556

ABSTRACT:
An electrophotographic black toner containing carbon black in a good dispersion state as well as a combined charge control agent system including a specific azo iron metal compound of formula (1) shown below and an oxycarboxylic acid metal compound is produced through polymerization in an aqueous system. The combined charge control agent system shows an effects of synergistically improving the chargeability of spherical polymerized toner particles. The azo iron metal compound improves the dispersion of the carbon black in the toner particles. ##STR1## wherein the denotations of R.sub.1 -R.sub.6, n, n' and A.sup..sym. are omitted.

REFERENCES:
patent: 4206064 (1980-06-01), Kiuchi et al.
patent: 5439770 (1995-08-01), Taya et al.
patent: 5451482 (1995-09-01), Law et al.

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