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US 5,332,635 AGranted
Electrophotographic photosensitive member, and electrophotographic apparatus, device unit, and facsimile machine employing the same
AssigneeCanon Kabushik Kaisha
InventorHisami Tanaka
Life of this patent
Estimating the term…
Abstract
An electrophotographic photosensitive member is disclosed which has an electroconductive support and a photosensitive layer formed thereon. The photosensitive layer contains at least one polycarbonate selected from the group consisting of polycarbonates (1) to (3); and a charge-transportion substance having the structure represented by the formula (4) or (5) and having an oxidation potential of not less than 0.6 eV. Also, an electrophotographic apparatus, device unit and facsimile machine employing the electrophotographic photosensitive member are disclosed.
Claims20
An electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, said photosensitive layer containing at least one polycarbonate selected from the group consisting of polycarbonates ( 1) to (3)below;
- and a charge-transporting substance having the structure represented by the formula (4)or (5) and having an oxidation potential of not less than 0.6 eV, (1) a copolymerized polycarbonate having the symmetric constitutional unit (a) below:
- ##STR56## where R.sub.11 to R.sub.18 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and the asymmetric constitutional unit (b) below:
- ##STR57## where R.sub.21 to R.sub.28 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.29 and R.sub.30 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or R.sub.29 and R.sub.30 may form a substituted or unsubstituted cycloalkylidene group by linking together;
- (2) a copolymerized polycarbonate having two or more asymmetric constitutional units represented by the formula (b) above;
- (3) a polycarbonate having a symmetric constitutional unit represented by the formula (c) below:
- ##STR58## where R.sub.31 to R.sub.38 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.39 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R.sub.39 having three or more carbons;
- ##STR59## wherein Ar.sub.4-1, Ar.sub.4-2 and Ar.sub.4-3 are respectively a substituted or unsubstituted aryl group, where the substituent is an alkyl group, an alkoxy group or a halogen atom;
- ##STR60## where Ar.sub.5-1, Ar.sub.5-2, and Ar.sub.5-3 are respectively a substituted or unsubstituted aryl group;
- Ar.sub.5-4 is a hydrogen atom or a substituted or unsubstituted aryl group;
- Ar.sub.5-3 and Ar.sub.5-4 may form a ring by linking together;
- R.sub.5-1 is a hydrogen atom, a substituted or unsubstituted alkyl group, or a halogen atom.
8 more elements
An electrophotographic apparatus comprising an electrophotographic photosensitive member, an image-forming means for forming an electrostatic latent image, a developing means for developing the formed latent image, and a transferring means for transferring a developed image to an image-receiving material;
- said electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the photosensitive layer containing at least one polycarbonate selected from the group consisting of polycarbonates (1) to (3) below;
- and a charge-transporting substance having the structure represented by the formula (4) or (5)and having an oxidation potential of not less than 0.6 eV, (1) a copolymerized polycarbonate having the symmetric constitutional unit (a) below:
- ##STR64## where R.sub.11 to R.sub.18 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and the asymmetric constitutional unit (b) below:
- ##STR65## where R.sub.21 to R.sub.28 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.29 and R.sub.30 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or R.sub.29 and R.sub.30 may form a substituted or unsubstituted cycloalkylidene group by linking together;
- (2) a copolymerized polycarbonate having two or more asymmetric constitutional units represented by the formula (b) above;
- (3) a polycarbonate having a symmetric constitutional unit represented by the formula (c) below:
- ##STR66## where R.sub.31 to R.sub.38 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.39 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R.sub.39 having three or more carbons;
- ##STR67## wherein Ar.sub.4-1, Ar.sub.4-2 and Ar.sub.4-3 are respectively a substituted or unsubstituted aryl group, where the substituent is an alkyl group, an alkoxy group or a halogen atom;
- ##STR68## where Ar.sub.5-1, Ar.sub.5-2, and Ar.sub.5-3 are respectively a substituted or unsubstituted aryl group;
- Ar.sub.5-4 is a hydrogen atom or a substituted or unsubstituted aryl group;
- Ar.sub.5-3 and Ar.sub.5-4 may form a ring by linking together;
- R.sub.5-1 is a hydrogen atom, a substituted or unsubstituted alkyl group, or a halogen atom.
9 more elements
A device unit comprising an electrophotographic photosensitive member, and at least one means selected from the group of a charging means, a developing means, and a cleaning means;
- said electrophotographic photosensitive member comprising an electroconductive support and a photosensitive layer formed thereon, the photosensitive layer containing at least one polycarbonate selected from the group consisting of polycarbonates (1) to (3)below;
- and a charge-transporting substance having the structure represented by the formula (4) or (5) and having an oxidation potential of not less than 0.6 eV,
- (1) a copolymerized polycarbonate having the symmetric constitutional unit (a) below:
- ##STR69## where R.sub.11 to R.sub.18 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and the asymmetric constitutional unit (b) below:
- ##STR70## where R.sub.21 to R.sub.28 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.29 and R.sub.30 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or R.sub.29 and R.sub.30 may form a substituted or unsubstituted cycloalkylidene group by linking together;
- (2) a copolymerized polycarbonate having two or more asymmetric constitutional units represented by the formula (b) above;
- (3) a polycarbonate having a symmetric constitutional unit represented by the formula (c) below:
- ##STR71## where R.sub.31 to R.sub.38 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.39 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R.sub.39 having three or more carbons;
- ##STR72## wherein Ar.sub.4-1, Ar.sub.4-2 and Ar.sub.4-3 are respectively a substituted or unsubstituted aryl group, where the substituent is an alkyl group, an alkoxy group or a halogen atom;
- ##STR73## where Ar.sub.5-1, Ar.sub.5-2, and Ar.sub.5-3 are respectively a substituted or unsubstituted aryl group;
- Ar.sub.5-4 is a hydrogen atom or a substituted or unsubstituted aryl group;
- Ar.sub.5-3 and Ar.sub.5-4 may form a ring by linking together;
- R.sub.5-1 is a hydrogen atom, a substituted or unsubstituted alkyl group, or a halogen a tom;
- and
- said unit holding integrally the electrophotographic photosensitive member and at least one means selected from the charging means, the developing means, and the cleaning means, and being demountable from the main body of an electrophotographic apparatus.
12 more elements
A facsimile machine comprising an electrophotographic apparatus and an information-receiving means for receiving image information from a remote terminal;
- said electrophotographic apparatus comprising an electrophotographic photosensitive member;
- and
- said electrophotographic photosensitive member, comprising an electroconductive support and a photosensitive layer formed thereon, the photosensitive layer containing at least one polycarbonate selected from the group consisting of polycarbonates (1) to (3)below;
- and a charge-transporting substance having the structure represented by the formula (4)or (5) and having an oxidation potential of not less than 0.6 eV,
- (1) a copolymerized polycarbonate having the symmetric constitutional unit (a) below:
- ##STR74## where R.sub.11 to R.sub.18 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and the asymmetric constitutional unit (b) below:
- ##STR75## where R.sub.21 to R.sub.28 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.29 and R.sub.30 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or R.sub.29 and R.sub.30 may form a substituted or unsubstituted cycloalkylidene group by linking together;
- (2) a copolymerized polycarbonate having two or more asymmetric constitutional units represented by the formula (b) above;
- (3) a polycarbonate having a symmetric constitutional unit represented by the formula (c) below:
- ##STR76## where R.sub.31 to R.sub.38 are respectively a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryl group, or a halogen atom, and R.sub.39 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, R.sub.39 having three or more carbons;
- ##STR77## wherein Ar.sub.4-1, Ar.sub.4-2 and Ar.sub.4-3 are respectively a substituted or unsubstituted aryl group, where the substituent is an alkyl group, an alkoxy group or a halogen atom;
- ##STR78## where Ar.sub.5-1, Ar.sub.5-2, and Ar.sub.5-3 are respectively a substituted or unsubstituted aryl group;
- Ar.sub.5-4 is a hydrogen atom or a substituted or unsubstituted aryl group;
- Ar.sub.5-3 and Ar.sub.5-4 may form a ring by linking together;
- R.sub.5-1 is a hydrogen atom, a substituted or unsubstituted alkyl group, or a halogen atom.
12 more elements
Dependencies are inferred from the claim text.