Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1996-01-30
1997-09-09
Goodrow, John
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430137, G03G 9087
Patent
active
056655061
ABSTRACT:
Disclosed is a process for preparing a particulate toner for developing an electrostatic image, which comprises suspending a polymerizable monomer composition comprising a polymerizable monomer, a resin dissolved therein, and a coloring agent in an aqueous medium not containing a dispersant to prepare a pre-suspension, jetting the pre-suspension through a nozzle under elevated pressure in a flowing direction which is forced to vary so that the pre-suspension collides with a predetermined plane or with each other, and then immediately passing the pre-suspension through an apparatus for throttling the path to produce back pressure and shearing stress to prepare a suspension containing a particulate polymerizable monomer and subjecting the resulting suspension to polymerization. The toner prepared by the process is a high performance toner which is free of finely divided grains and emulsion, exhibits a high chargeability, a uniform chargeability distribution, an excellent environmental stability and a high definition, and is insusceptibie to fogging and unevenness.
REFERENCES:
patent: 4702988 (1987-10-01), Fukumoto et al.
patent: 5474870 (1995-12-01), Yamazaki et al.
Patent Abstracts of Japan, vol. 12, No. 361 (P-763) [3208], Sep. 28, 1988, JP-A-63 113 561, May 18, 1988.
Hamada Hiroshi
Kashima Koichi
Nagaoka Makoto
Otani Shinji
Takasou Kiyokazu
Goodrow John
Hodogaya Chemical Co. Ltd.
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