Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1980-12-19
1982-09-14
Martin, Jr., Roland E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
430 71, 430 72, 430 75, 430 76, 430 79, 260160, 260188, G03G 506, G03G 514
Patent
active
043496164
ABSTRACT:
An electrophotographic element comprising an electrically conductive substrate and a monolayer or multilayer type photo-sensitive layer, superposed thereon, containing as an effective ingredient a disazo pigment having the general formula (I): ##STR1## wherein Ar.sup.1 and Ar.sup.2 each represent a phenylene group. However, when Ar.sup.1 is 1,4-phenylene group Ar.sup.2 is 1,2- or 1,3-phenylene group; when Ar.sup.1 is 1,3-phenylene group Ar.sup.2 may be any one of 1,2-, 1,3- and 1,4-phenylene groups; and when Ar.sup.1 is 1,2-phenylene group Ar.sup.2 is 1,3-phenylene group. X represents aromatic rings such as benzene ring, naphthalene ring and the like, hetero rings such as indole ring, carbazole ring, benzofuran ring and the like or their substitution products; Ar.sup.3 represents aromatic rings such as benzene ring, naphthalene ring and the like, hetero rings such as dibenzofuran ring and the like or their substitution products; and R represents a hydrogen atom, a lower alkyl group, phenyl group or its substitution product.
REFERENCES:
patent: 4272598 (1981-06-01), Sasaki et al.
Martin Jr. Roland E.
Ricoh Co. Ltd.
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