Multilayer electrophotographic element containing a trisazo char

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product

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430 73, 430 75, 430 76, G03G 506

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active

044368003

ABSTRACT:
An electrophotographic element comprising an electrically conductive substrate, a charge carrier generating layer and a charge transfer layer superimposed on said substrate, wherein said charge carrier generating layer contains a trisazo compound having the general formula (I): ##STR1## (wherein, Ar.sup.1 represents a substituted or unsubstituted phenyl radical
and
said charge transfer layer contains a hydrazone compound having the general formula (II), (III), (IV), or (V): ##STR2## (wherein, R.sup.1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group, R.sup.2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group, and R.sup.3 represents hydrogen, chlorine, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, a dialkylamino group or a nitro group.), ##STR3## (wherein, Ar.sup.2 represents a naphthalene ring, an anthracene ring, a styryl group and their substituents, or a pyridine ring, a furan ring or a thiophene ring, and R.sup.4 represents an alkyl group or a benzyl group.), ##STR4## (wherein, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a dialkyl group or a dibenzylamino group, and R.sup.9 represents an alkyl group or a benzyl group.), ##STR5## (wherein, R.sup.10, R.sup.11, R.sup.12 and R.sup.13 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a substituted or non-substituted dialkylamino group, a dibenzylamino group or a halogen atom.), and a binder.

REFERENCES:
patent: 4279981 (1981-07-01), Ohta et al.
patent: 4338388 (1982-07-01), Sakai et al.
patent: 4343882 (1982-08-01), Hashimoto

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