Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1998-03-23
1999-11-09
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 9135
Patent
active
059811340
ABSTRACT:
A liquid developer for electrophotography using a polyester resin as a toner binder resin which is suitable for high-speed systems and has excellent stability over time is disclosed.
The invention is a novel liquid developer for electrophotography having colored particles dispersed in an electrically insulated fluid medium. The liquid developer includes an oil-soluble ionic surface active agent as a charge controller. According to one embodiment, the colored particles include a binder resin having an acid value of 40 mgKOH/g or higher but less than or equal to 100 mgKOH/g. According to another embodiment, the colored particles include a binder resin having a glass transition temperature Tg of 35.degree. C. or higher but less than or equal to 65.degree. C.
REFERENCES:
patent: 5393636 (1995-02-01), Sugita et al.
patent: 5589312 (1996-12-01), Horie et al.
patent: 5753763 (1998-05-01), Rao et al.
patent: 5759733 (1998-06-01), Tsubuko et al.
Fujiwara Toshimitsu
Miyamoto Hidetoshi
Ojima Seishi
Goodrow John
Minolta Co. , Ltd.
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