Electrophotographic recording material having a julolidine hydrazone compound
AssigneeAgfa-Gevaert
InventorsMarcel J. Monbaliu, David R. Terrell, Stefaan K. De Meutter, Paul R. Callant
Life of this patent
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Abstract
An electrophotographic recording material which comprises an electrically conductive support having thereon a photoconductive layer containing one or more p-type photoconductive charge transport substances, characterized in that at least one of the p-type charge transport substances is a hydrazone compound corresponding to a general formula (I) to (V) as defined in the description, and the use of a said hydrazone compound in the charge transporting layer of a bilayer-system photoconductive material comprising a charge generating layer in contiguous relationship with said charge transporting layer.
Claims13
An electrophotographic recording material which comprises an electrically conductive support having thereon a photoconductive layer containing one or more p-type photoconductive charge transport substances, characterized in that at least one of the p-type charge transport substances is a hydrazone compound corresponding to a following general formula (I) to (V):
- ##STR18## wherein:
- each of R.sup.1 and R.sup.2 represents hydrogen, or R.sup.1 represents hydrogen and R.sup.2 represents an alkyl, an aryl or a heterocyclic group,
- each of R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9 and R.sup.10 (same or different) represents hydrogen or an alkyl group,
- each of R.sup.11 and R.sup.12 (same or different) represents hydrogen, an alkyl group, an alkoxy group, thioalkoxy group, N-dialkyl group or halogen,
- each of R.sup.13 and R.sup.14 (same or different) represents an alkyl group, an aryl group or a heterocyclic group, or R.sup.13 and R.sup.14 together represent the necessary atoms to close a heterocyclic nitrogen containing ring;
- ##STR19## wherein:
- each of R.sup.1 and R.sup.2 is hydrogen, or one of R.sup.1 and R.sup.2 represents hydrogen and the other represents an alkyl, an aryl or a heterocyclic group,
- Z represents the necessary atoms to close a 5- or 6-membered homocyclic ring,
- each of R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 (same or different) represents hydrogen or an alkyl group,
- each of R.sup.11 and R.sup.12 (same or different) represents hydrogen, an alkyl group, an alkoxy group, thioalkoxy group, N-dialkyl group or halogen, and
- each of R.sup.13 and R.sup.14 (same or different) represents an alkyl group, an aryl group or a heterocyclic group, or R.sup.13 and R.sup.14 together represent the necessary atoms to close a heterocyclic nitrogen containing ring;
- ##STR20## wherein:
- each of R.sup.1 and R.sup.2 represents hydrogen, or R.sup.1 represents hydrogen and R.sup.2 represents an alkyl, an aryl or a heterocyclic group,
- each of Z.sup.1 and Z.sup.2 (same or different) represents the necessary atoms to close a 5- or 6-membered homocyclic ring,
- each of R.sup.7 and R.sup.16 (same or different) represents hydrogen or an alkyl group,
- each of R.sup.11 and R.sup.12 (same or different) represents hydrogen, an alkyl group, an alkoxy group, thioalkoxy group, N-dialkyl group or halogen, and
- each of R.sup.13 and R.sup.14 (same or different) represents an alkyl group, an aryl group or a heterocyclic group, or R.sup.13 and R.sup.14 together represent the necessary atoms to close a heterocyclic nitrogen containing ring;
- ##STR21## wherein:
- each of R.sup.1 and R.sup.2 represents hydrogen, or R.sup.1 represents hydrogen and R.sup.2 represents an alkyl, an aryl or a heterocyclic group,
- each of Z.sup.1 and Z.sup.2 (same or different) represents the necessary atoms to close a 5- or 6-membered homocyclic ring,
- each of Y.sup.1 and Y.sup.2 (same or different) represents the necessary atoms to close a 6-membered aromatic ring,
- each of R.sup.11 and R.sup.12 (same or different) represents hydrogen, an alkyl group, an alkoxy group, thioalkoxy group, N-dialkyl group or halogen,
- each of R.sup.13 and R.sup.14 (same or different) represents an alkyl group, an aryl group or a heterocyclic group, or R.sup.13 and R.sup.14 together represent the necessary atoms to close a heterocyclic nitrogen containing ring, and
- each of R.sup.17 and R.sup.18 (same or different) represents hydrogen, an alkyl group, an alkoxy group or halogen;
- ##STR22## wherein:
- each of R.sup.1 and R.sup.2 represents hydrogen, or R.sup.1 represents hydrogen and R.sup.2 represents an alkyl, an aryl or a heterocyclic group,
- each of Y.sup.1 and Y.sup.2 (same or different) represents the necessary atoms to close a 6-membered aromatic ring,
- each of R.sup.3 and R.sup.10 (same or different) represents hydrogen or alkyl,
- each of R.sup.11 and R.sup.12 (same or different) represents hydrogen, an alkyl group, an alkoxy group, thioalkoxy group, N-dialkyl group or halogen,
- each of R.sup.13 and R.sup.14 (same or different) represents an alkyl group, an aryl group or a heterocyclic group, or R.sup.13 and R.sup.14 together represent the necessary atoms to close a heterocyclic nitrogen containing ring, and
- each of R.sup.17 and R.sup.18 (same or different) represents hydrogen, an alkyl group, an alkoxy group or halogen.
Dependencies are inferred from the claim text.