Process for producing a polymerized toner

Details Process for producing a polymerized toner Process for producing a polymerized toner

1998-05-21

1999-10-19

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

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

Process of making developer composition

G03G 9087

Patent

active

059687053

ABSTRACT:
An object of the present invention is to provide a process for producing stably a polymerized toner having excellent balance of shelf stability and fixability, and high resolution visible image formation. The process for producing a polymerized toner comprising a step of raising the temperature of an aqueous dispersion of monomer composition comprising a colorant, a polymerization initiator such as t-butyl peroxy-2-ethylhexanoate and a polymerizable monomer component such as styrene to a temperature lower than a target polymerization temperature by about 10 to about 40.degree. C., a step of raising the temperature of the dispersion at the rate of about 1 to about 20.degree. C. an hour to a temperature lower than the target polymerization temperature by about 5.degree. C., and a step of raising the temperature of the dispersion at the rate of about 3 to about 10.degree. C. an hour to the target polymerization temperature, whereby the polymerizable monomer component is polymerized.

REFERENCES:
patent: 5346790 (1994-09-01), Sacripante et al.
patent: 5549998 (1996-08-01), Georges et al.

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