Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1991-07-16
1994-05-17
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
4301066, 430109, 430111, 430137, G03G 900, G03G 500, G03G 9083, G03G 9107
Patent
active
053127110
ABSTRACT:
A negatively-chargeable dry electrostatographic developer is disclosed containing fluorinated inorganic microparticles, and toner particles comprising an acidic binder resin having an acid value between 10 and 30 mg KOH/G and not comprising (a) charge-controlling agent(s). The developers according to this invention show excellent fluidity and have improved negative chargeability. According to a preferred mode, fluorinated silica-type microparticles are added to the developer as free flowing additive in an amount of 0.1 to 5% by weight with respect to the toner, which preferably comprises an acidic carbon black.
REFERENCES:
patent: 4748474 (1988-05-01), Kurematsu et al.
patent: 4973540 (1990-11-01), Machida et al.
Dewanckele Jean-Marie O.
Sterckx Paul F.
Tavernier Serge M.
Agfa-Gevaert N.V.
Crossan Stephen C.
McCamish Marion E.
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