摘要:
An electrophotographic photoreceptor is disclosed, comprising a conductive support having provided thereon a light-sensitive layer containing at least one of a specific type of bisstilbene compound as a photoconductive substance or a charge transporting material. The photoreceptor has high sensitivity, a small residual potential, and stability to ozone, light, or heat.
摘要:
An electrophotographic light-sensitive material is described. The material is comprised of an electrically conductive support and a light-sensitive layer on the support. The light-sensitive layer contains a copolymer comprising: (a) vinylidene chloride or vinyl chloride; (b) a vinyl based unsaturated monomer represented by the general formula: CH.sub.2 =C(R.sub.1)(R.sub.2) (wherein the symbols are as defined in the appended claims); and (c) a vinyl monomer containing a hydroxyl group at the side chain thereof. This light-sensitive layer exhibits good adhesive properties, is superior in durability and moisture resistance, and produces images free from white spots and fog.
摘要:
A photoconductive composition comprising a photoconductive substance and at least one spectral sensitizer selected from azacyanines represented by formula (I), (II), (III), (IV) or (V) ##STR1## and a photosensitive member containing such a spectral sensitizer.
摘要:
An electrophotographic photoreceptor is described, comprising a photosensitive layer disposed on a conductive substrate, said photosensitive layer having a laminated structure comprising an electric charge generating layer and an electric charge transporting layer, said electric charge generating layer containing a phthalocyanine pigment which is selected from .epsilon.-type copper phthalocyanine, X-type or .tau.-type phtalocyanine, indium chloride phthalocyanine, calcium chloride phthalocyanine, and magnesium phthalocyanine, one of the benzene rings of the aluminum chloride or indium chloride phthalocyanine being optionally monochlorinated, and said electric charge transporting layer containing at least one hydrazone compound represented by formula (I) or (II) as set below: ##STR1## wherein the substituents are as defined in the specification.
摘要:
Light-sensitive compositions are provided, containing at least one bisazulenium salt compound of the general formulae (1) and (2): ##STR1## wherein all the symbols are defined in the specification. Electrophotographic photoreceptors containing the present composition have high sensitivity and stable potential characteristic in repeated use. The present compositions are further usable in optical information-recording media, and the media containing the present composition have sufficient preservation stability, high sensitivity and sufficient S/N ratio.
摘要:
Disazo compounds represented by the following general formula (I) are disclosed. The compounds can function as effective photoconductive substances and further, as efficient charge carrier (both electron and positive hole) generating compounds in an electrophotographic photoreceptor: ##STR1## (wherein X represents atoms necessary to form an aromatic ring, such as a naphthalene ring, an anthracene ring, etc., or a netero ring, such as an indole ring, a carbazole ring, a dibenzofuran ring etc., (all of which rings may be either substituted ones or nonsubstituted ones) by combining with the benzene ring to which a hydroxyl group and a group Y are attached; Y represents ##STR2## R.sup.1 represents an alkyl group, a phenyl group or a substituted group thereof; R.sup.2 represents a hydrogen atom, a lower alkyl group, a carbamoyl group, a carboxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, or a substituted or a nonsubstituted amino group; R.sup.3 and R.sup.5 each represents an alkyl group, an aromatic ring residue like a phenyl group, an aromatic heterocyclic residue like a dibenzofranyl group, a carbazolyl group, etc., or a substituted group thereof; and R.sup.4 represents a hydrogen atom, an alkyl group, a phenyl group or a substituted group thereof).
摘要:
An electrophotographic light-sensitive material comprising a charge transporting compound and a styryl dye represented by formula (I) ##STR1## wherein A represents N--R.sub.8, O, S, Se, or ##STR2## R.sub.1 and R.sub.2 each represents a hydrogen atom or a substituent having a Hammett's substituent constant, .delta., of 0.2 or more;R.sub.3, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 each represents a hydrogen atom, an alkyl group or a substituted alkyl group containing from 1 to 5 carbon atoms in the alkyl moiety;R.sub.4 and R.sub.5 each represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group;X.sup..crclbar. represents an anion; andn represents an integer of 1 or 2.
摘要:
A photosensitive composition is provided comprising at least one azo compound represented by formula (1) ##STR1## wherein A.sup.1 represents a substituted or unsubstituted carbocyclic or heterocyclic aromatic ring; X represents an atomic group forming a substituted or unsubstituted carbocyclic or heterocyclic aromatic ring upon condensation with benzene rings; Ar represents a carbocyclic or heterocyclic aromatic ring substituted by at least one perfluoroalkyl group (groups other than perfluoroalkyl group may also be present); and n represents an integer of 3, 4, 5, or 6.
摘要:
An electrophotographic photoreceptor which has an electrophotographic photoreceptive layer containing as a charge generating material a particular organic compound having the general formula described hereinafter in this disclosure in a combination with a charge transporting material. The compounds improve upon the sensitivity, durability and selectivity to photosensitive wavelengths of photoreceptors. Furthermore, the photoreceptors can be easily manufactured.
摘要:
Disazo compounds as well as the compositions an electrophotographic light-sensitive materials utilizing them are disclosed. The disazo compounds are represented by the general formula (I): ##STR1## wherein the substituents within the general formula (I) are defined within the specification. By utilizing the specifically disclosed disazo compounds the electrophotographic light-sensitive material has high sensitivity and high durability.