Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1989-09-20
1991-01-29
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
430 70, 430 72, 430 74, 430 75, 430 76, 430 77, 430 78, 430 79, 534653, 534657, 534753, 534796, G03G 5047, G03G 506
Patent
active
049885936
ABSTRACT:
An electrophotographic photosensitive member having a photosensitive layer is formed on a support and contains an azo pigment expressed by a general formula [I] or [II]: ##STR1## where A, B.sub.1 and B.sub.2 are aromatic hydrocarbon nucleus groups or heterocyclic groups which may be optionally linked by coupler groups, A is an univalent group, B.sub.1 is an univalent, bivalent or trivalent group, and B.sub.2 is a bivalent or trivalent group; X is a residue necessary for forming a polycyclic aromatic nucleus or a heterocycle by condensation with a benzene nucleus; R is a halogen atom, an alkyl group or an alkoxy group; n.sub.1 is an integer from 1 to 3; and n.sub.2 is an integer from 1 to 3. This photosensitive layer may be composed of a charge generation layer containing the above azo pigment and a charge transport layer.
REFERENCES:
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patent: 4702982 (1987-10-01), Matsumoto et al.
patent: 4735882 (1988-04-01), Yamashita et al.
patent: 4810607 (1989-03-01), Matsumoto et al.
patent: 4939053 (1990-07-01), Ueda
Canon Kabushiki Kaisha
Martin Roland
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