Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Electrophoretic imaging – process – composition – or product
Patent
1982-04-28
1984-01-24
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Electrophoretic imaging, process, composition, or product
430 38, G03G 1704
Patent
active
044277520
ABSTRACT:
A photoelectrophoretic imaging process, wherein a suspension of photosensitive pigment particles between two electrodes, at least one of which is transparent, is subjected to the influence of an electric field and exposed to an image, which process comprises using, as photosensitive pigment, an isoindoline of the formula ##STR1## wherein R.sub.1 and R.sub.3 are cyano, --COOR or --CONHR', in which R is alkyl, cycloalkyl, aryl or a heterocyclic aromatic radical, and R' is hydrogen, alkyl, cycloalkyl, aryl or a heterocyclic aromatic radical, R.sub.2 and R.sub.4 are cyano, or wherein R.sub.3 and R.sub.4, together with the carbon atom linking them, form a heterocyclic 6-membered ring.
The pigments used in this invention are distinguished by particularly good photoelectrophoretic sensitivity and low fog density.
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Sieber Werner
von der Crone Jost
Ciba-Geigy Corporation
Goodrow John L.
Hall Luther A. R.
Kittle John E.
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