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US 5,013,623 AGranted
Electrophotographic photoreceptor with stilbene compound
AssigneeMitsubishi Paper Mills Limited
InventorsAkira Itoh, Kozo Haino, Makoto Okaji, Kazuhiro Emoto, Tatsuya Kodera
Life of this patent
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Abstract
Disclosed is an electrophotographic photoreceptor which is high is sensitivity and high in endurance and which contains in photosensitive layer a novel stilbene compound represented by the following formulas [I], [II], or [III]: ##STR1##
Claims9
An electrophotographic photoreceptor which comprises an electroconductive support and, provided thereon, a photosensitive layer which contains a stilbene compound represented by the following formula [I], [II], or [III]:
- ##STR16## wherein R.sub.1 and R.sub.2 which may be identical or different each is a hydrogen atom or an alkyl, aryl, or styryl group which may have substituent and at least one of them is an aryl or styryl group which may have substituent;
- R.sub.3 is an alkyl, aralkyl or aryl group which may have substituent;
- R.sub.4 and R.sub.5 which may be identical or different each is a hydrogen atom, or an alkyl, benzyl or phenyl group which may have substituent, and R.sub.6 is a hydrogen atom, or an alkyl or alkoxy group which may have substituent, or a halogen atom;
- ##STR17## wherein R.sup.1 is an atom group necessary to form a ring together with nitrogen atom;
- R.sup.2 is a hydrogen atom, or an alkyl or alkoxy group which may have substituent;
- R.sup.3 is a hydrogen atom, or an alkyl or aryl group which may have substituent;
- R.sup.4 is an aryl group which may have substituent;
- R.sup.5 is a hydrogen atom, or an alkyl, aralkyl or aryl group which may have substituent;
- R.sup.6 and R.sup.7 which may be identical of different each is a hydrogen atom, or an alkyl, aralkyl or aryl group which may have substituent and R.sup.6 and R.sup.7 may form a ring;
- and n is 0 or 1;
- or ##STR18## wherein A is an aromatic ring and the two A may link through a bond, an atom or an atom group to form a heterocyclic ring together with nitrogen atom;
- R.sup.1 is a hydrogen atom, or an alkyl or aryl group which may have substituent;
- R.sup.2 is an aryl group which may have substituent;
- R.sup.3 is an alkyl, aralkyl or aryl group which may have substituent;
- R.sup.4 and R.sup.5 which may be identical or different each is a hydrogen atom, or an alkyl, aralkyl or aryl group which may have substituent and R.sup.4 and R.sup.5 may form a ring;
- and n is 0 or 1.
13 more elements
Dependencies are inferred from the claim text.