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US 6,183,922 B2Granted
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHideyuki Takai, Masato Tanaka, Kan Tanabe
Life of this patent
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Abstract
An electrophotographic photosensitive member is disclosed which is comprised of a support and a photosensitive layer provided thereon and is exposed to semiconductor laser light having a wavelength of from 380 nm to 500 nm. The photosensitive layer contains an azo pigment represented by the general formula: Ar—(—N═N—Cp)n.
Claims45
An electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon, said photosensitive layer being sensitive to semiconductor laser light having a wavelength of from 380 nm to 500 nm;
- said photosensitive layer containing an azo pigment represented by the following Formula (1):
- Ar[Parenopenst]N═N—Cp)n (1)
- wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon cyclic group or heterocyclic group which may be bonded directly or via a linking group;
- Cp represents a coupler residual group represented by the following Formula (2), (3), (4) or (5);
- and n represents an integer of 1 to 3;
- provided that a plurality of —N═N—Cp moieties are not bonded to the same benzene ring;
- wherein X represents a residual group necessary for condensing with the benzene ring to form a polycyclic aromatic ring or heterocyclic ring;
- R1 and R2 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R1 and R2 may form a cyclic amino group via the nitrogen atom in the formula;
- Z1 represents an oxygen atom or a sulfur atom;
- and m1 represents an integer of 0 or 1;
- wherein Y represents a substituted or unsubstituted divalent aromatic hydrocarbon cyclic group or a substituted or unsubstituted divalent nitrogen-containing heterocyclic group;
- wherein R3 represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, an alkoxycarbonyl group, a carbamoyl group or a nitro group;
- R4 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;
- R5 represents a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a cyano group or a nitro group;
- and l represents an integer of 0 to 2, and, when l is 2, R5's may be different groups;
- wherein R6 and R7 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R6 and R7 may form a cyclic amino group via the nitrogen atom in the formula;
- Z2 represents an oxygen atom or a sulfur atom;
- and m2 represents an integer of 0 or 1.
15 more elements
A process cartridge comprising an electrophotographic photosensitive member and a means selected from the group consisting of a charging means, a developing means and a cleaning means;
- said electrophotographic photosensitive member and at least one of said means being supported as one unit and being detachably mountable to the main body of an electrophotographic apparatus;
- and
- said electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon, said photosensitive layer being sensitive to semiconductor laser light having a wavelength of from 380 nm to 500 nm;
- said photosensitive layer containing an azo pigment represented by the following Formula (1):
- Ar[Parenopenst]N═N—Cp)n (1)
- wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon cyclic group or heterocyclic group which may be bonded directly or via a linking group;
- Cp represents a coupler residual group represented by the following Formula (2), (3), (4) or (5);
- and n represents an integer of 1 to 3;
- provided that a plurality of —N═N—Cp moieties are not bonded to the same benzene ring;
- wherein X represents a residual group necessary for condensing with the benzene ring to form a polycyclic aromatic ring or heterocyclic ring;
- R1 and R2 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R1 and R2 may form a cyclic amino group via the nitrogen atom in the formula;
- Z1 represents an oxygen atom or a sulfur atom;
- and m1 represents an integer of 0 or 1;
- wherein Y represents a substituted or unsubstituted divalent aromatic hydrocarbon cyclic group or a substituted or unsubstituted divalent nitrogen-containing heterocyclic group;
- wherein R3 represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, an alkoxycarbonyl group, a carbamoyl group or a nitro group;
- R4 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;
- R5 represents a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a cyano group or a nitro group;
- and l represents an integer of 0 to 2, and, when l is 2, R5's may be different groups;
- wherein R6 and R7 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R6 and R7 may form a cyclic amino group via the nitrogen atom in the formula;
- Z2 represents an oxygen atom or a sulfur atom;
- and m2 represents an integer of 0 or 1.
18 more elements
An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging means, an exposure means, a developing means and a transfer means;
- said exposure means having a semiconductor laser having an oscillation wavelength of from 380 nm to 500 nm as an exposure light source;
- and
- said electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon;
- said photosensitive layer containing an azo pigment represented by the following Formula (1);
- Ar[Parenopenst]N═N—Cp)n (1)
- wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon cyclic group or heterocyclic group which may be bonded directly or via a linking group;
- Cp represents a coupler residual group represented by the following Formula (2), (3), (4) or (5);
- and n represents an integer of 1 to 3;
- provided that a plurality of —N═N—Cp moieties are not bonded to the same benzene ring;
- wherein X represents a residual group necessary to condense with the benzene ring to form a polycyclic aromatic ring or heterocyclic ring;
- R1 and R2 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R1 and R2 may form a cyclic amino group via the nitrogen atom in the formula;
- Z1 represents an oxygen atom or a sulfur atom;
- and m1 represents an integer of 0 or 1;
- wherein Y represents a substituted or unsubstituted divalent aromatic hydrocarbon cyclic group or a substituted or unsubstituted divalent nitrogen-containing heterocyclic group;
- wherein R3 represents a hydrogen atom, a halogen atom, a cyano group, a carboxyl group, an alkoxycarbonyl group, a carbamoyl group or a nitro group;
- R4 represents a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group;
- R5 represents a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxyl group, a cyano group or a nitro group;
- and l represents an integer of 0 to 2, and, when l is 2, R5's may be different groups;
- wherein R6 and R7 each represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group, and R6 and R7 may form a cyclic amino group via the nitrogen atom in the formula;
- Z2 represents an oxygen atom or a sulfur atom;
- and m2 represents an integer of 0 or 1.
18 more elements
Dependencies are inferred from the claim text.