Electrophotograhic photoreceptor
AssigneesYamanashi Electronics Co., Ltd., Shindengen Electric Manufacturing Co., Ltd.
InventorsKazuhito Dohi, Hajime Suzuki, Tetsushi Shiozawa, Yoichi Watanabe
Life of this patent
Estimating the term…
Abstract
The invention provides an electrophotographic photoreceptor excellent in various characteristics, especially effectively protected from light fatigue and stable against repeated use. The photoreceptor comprises an electroconductive substrate having placed thereon a photosensitive layer which contains a bisazo compound of the formula [I]: ##STR1## a diamine derivative of the formula [IV]: ##STR2## and a specific amount of a phenolic antioxidant, and the photoreceptor contains, if necessary, an intermediate layer between the electroconductive substrate and the photosensitive layer.
Claims12
An organic electrophotographic photoreceptor which comprises an electroconductive substrate having placed thereon a photosensitive layer, said layer containing a bisazo compound represented by the formula (I) and a diamine derivative represented by the formula (IV):
- ##STR29## wherein X represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 3 carbon atoms and Y represents a group represented by one of the formula (II) --CONH--Ar and the formula (III) --CONHN.dbd.CH--Ar in which Ar represents a group selected from ##STR30## wherein X' represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 3 carbon atoms;
- each n represents independently an integer of 0-5 and each of R.sub.1 -R.sub.4 represents independently a hydrogen atom, an alkyl group or an alkoxy group having 1 to 3 carbon atoms.
An organic electrophotographic photoreceptor according to 7, wherein the electrophotoacceptor is at least one compound selected from the group consisting of compounds represented by formulas [V]-(1)-[V]-(3):
- ##STR31## (wherein each of X.sub.1 and Y.sub.1 represents independently an alkyl group, an alkoxy group or an alkyl amino group, each of X.sub.2 and Y.sub.2 represents independently an alkyl group or an alkoxy group and each of X.sub.3 and Y.sub.3 represents independently an alkyl group or an alkoxy group).
Dependencies are inferred from the claim text.