Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1988-04-07
1989-11-07
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430108, 430111, G03G 914
Patent
active
048791989
ABSTRACT:
A particulate material suited for serving as carrier particles for finely-divided toner particles in magnetic brush toner-carrier development of electrostatic charge patterns, said carrier particles comprising finely divided magnetite powder dispersed in a resin binder, characterized in that said magnetite powder is a mixture of magnetites wherein one type (A) of the magnetite has an oil absorption number in the range of 10 to 20 g/100 g pigment and another type (B) of the magnetite has an oil absorption number in the range of 20 to 40 g/100 g pigment. The binder contains hydrophilic functional groups and has an acid number in the range of 5 to 50 KOH/g.
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patent: 4504562 (1985-03-01), Miyakawa et al.
patent: 4533614 (1985-08-01), Fukumoto et al.
patent: 4657837 (1987-04-01), Morita et al.
patent: 4675268 (1987-06-01), Kishi et al.
Tavernier Serge M.
Van Beek Joannes J.
van Daele Pierre L.
AGFA-GEVAERT N.V.
Daniel William J.
Lindeman Jeffrey A.
Michl Paul R.
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