Abstract: This invention relates to a photosensitive member having a photosensitive layer wherein the photosensitive layer comprises a charge generating material, a phthaloperinone compound represented by the general formula [I] or [I'] below, and/or naphthalimide represented by the general formula [II] or ]II'] below; ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are respectively a hydrogen atom, an alkyl group, an amino group, a hydroxy group, a halogen atom, a nitro group, or a cyano group; R.sub.6 is a hydrogen atom, an alkyl group or an aryl group; Z is a residual group forming a condensed aromatic cyclic ring with a benzene ring and Z may have a substitutent.

Abstract: This invention relates to a photosensitizer which is bound to a cellulose acetate polymer, a method of preparing the bound photosensitizer and a process for using the bound photosensitizer. The photosensitizers which may be used in the invention include rose bengal, rhodamine B, acridine orange, methylene blue and zinc phthalocyanine. The photosensitizer is attached to the cellulose acetate by reacting an acid group on the photosensitizer with a hydroxyl group. Finally, the bound photosensitizer may be used to oxidize undesirable oxidizable compounds present in a hydrocarbon or aqueous fraction. One specific example is the sweetening of kerosene which involves oxidizing the mercaptans contained in the kerosene.

Abstract: An electrophotographic printing plate comprising a conductive support having provided thereon a photoconductive insulating layer containing:(1) at least one organic photoconductive compound,(2) at least one sensitizer selected from the group consisting of compounds represented by formula (A-I), (A-II), (B), (C-I), (C-II), (C-III), (C-IV), (D) or (E); ##STR1## . (3) at least one amide compound selected from the group consisting of compounds represented by formula (I), (II), or (III); ##STR2## and (4) a binder resin soluble or dispersible in an alkaline solvent (wherein symbols in formulae are defined as in claim 1). The printing plate exhibits high sensitivity sufficient to respond to a laser light source and provides a printing plate free from background stains.

Abstract: A photoconductive material comprising a mixed crystal of at least two phthalocyanine compounds whose central substances are different from each other, the phthalocyanine compounds being represented by formula (I): ##STR1## wherein A represents a substance capable of bonding to the phthalocyanine ligand through a covalent bond or a coordinate bond. The photoconductive material exhibits stability to heat and light and sufficient sensitivity in the visible to near infrared region.

Abstract: A persistent photoconductive coating composition contains a persistent photoconductor, photoinitiator, an acetate or phenolic hydroxyl containing resin and ketone dispersed in an inert coherent matrix.

Abstract: Cyanine dyes, particularly indocyanine dyes, having at least 7 carbon atoms in the polymethine chain which may possess a fused cyclopentene or cyclohexene ring in the form of a tri-iodide salt exhibit a substantial reduction in the propensity to associate compared to dyes having the identical cation but different anion. The tri-iodide salts are particularly useful as sensitizers in organic photoconductor systems.

Abstract: An electrophotographic photosensitive member comprises a photosensitive layer containing an organic photoconductor provided on an electroconductive substrate, wherein said photosensitive layer contains a compound represented by the formula (1) shown below in an amount ranging from 0.1 to 10% by weight based on the total weight of the photosensitive layer added;Formula: ##STR1## wherein R represents ##STR2## X.sub.1, X.sub.2 and X.sub.3 each represent hydrogen atom or methyl group, X.sub.4 represents ##STR3## X.sub.5 represents hydrogen atom, an alkyl group or an alkenyl group.

Abstract: An electrophotographic recording material is disclosed that comprises an electrically conducting layer support being in particular suitable for the production of printing plates or printed circuits, and a photoconductive layer comprising an organic photoconductor, a phenolic resin as the binder, a sensitizer and customary additives. The binder employed is an optionally substituted polyvinylphenol which has a molecular weight (weight average) of preferably between 1,500 and 60,000. The polyvinylphenol may be halogenated, preferably brominated. Furthermore, an o-quinonediazide may be contained in the photoconductive layer. The recording material is distinguished by a high charging capacity, good photosensitivity and excellent solubility properties. It is suitable for the reproduction of fine image elements.

Abstract: An electrophotographic printing plate comprising a conductive support having provided thereon a photoconductive insulating layer containing:(1) at least one organic photoconductive compound,(2) at least one sensitizer for said at least one organic photoconductive compound represented by formula (I); ##STR1## wherein Bu.sup.t represents a t-butyl group; R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group having from 1 to 5 carbon atoms, or a substituted or unsubstituted aryl group having from 6 to 18 carbon atoms; R.sub.3, R.sub.4, R.sub.5, and R.sub.6, which may be the same or different, each represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms, or a halogen atom; and Z.sup..crclbar. represents an anion; and (3) a binder resin soluble or dispersible in an alkaline solvent.

Abstract: An electrophotographic recording element comprising(A) an electrically conducting base and(B) at least one photoconductive layer consisting essentially of(b.sub.1) at least one binder,(b.sub.2) at least one sensitizer which on exposure of layer (B) generates charge carriers and which is selected from the group of the naphtholactam dyes of the general structure I ##STR1## where the indices and variables have specified meanings, (b.sub.3) at least one photoconductor which transports the generated charge carriers and optionally(b.sub.4) additives, and also novel naphtholactam dyes of the general formula I where R.sup.2 is substituted monocyclic 1,3-thiazolyl bonded to the naphtholactam structure via a carbon ring atom, the use of these novel naphtholactams I in electrophotographic and laser-optical recording elements and also novel reprographic processes and novel processes for producing offset printing plates and photoresists using the novel electrophotographic recording element.

Abstract: The invention relates to 4-chlorooxazole derivatives of the general formula I ##STR1## which carry an unsaturated group in the 2- or 5-position, e.g., the --CH.dbd.CH-- or --CH.dbd.CH--CH.dbd.CH-- group.In the formulaR.sub.1 is phenyl, which is optionally substituted in one or more positions by (C.sub.1 -C.sub.4)-alkoxy or di-(C.sub.1 -C.sub.4)-alkylamino radicals andR.sub.2 is phenyl, phenyloxazolyl, pyridyl, julolidin-9-yl, N-(C.sub.1 -C.sub.4 -alkyl)-carbazol-3-yl, coumarin-6-yl, or stilben-4-yl, which are optionally substituted in one or more positions by (C.sub.1 -C.sub.4)-alkyl, (C.sub.1-C.sub.4)-alkoxy, halogen-(C.sub.1 -C.sub.4)-alioxy, hydroxy, halogen, di-(C.sub.1 -C.sub.4)-alkylamino, or dibenzylamino radicals.The compounds are used as photoconductive substances.

Abstract: An electrophotographic plate for making a printing plate is provided. Said electrophotographic plate comprises an electrically conductive and hydrophilic base and a photoconductive layer provided thereon, said photoconductive layer containing an alkali and/or alcohol soluble polymer, a phtalocyanine pigment and a compound represented by the formula (I):(X).sub.n Y (I)where X represents thiobarbituric acid residue from which one hydrogen atom at 5-position has been eliminated and in which nitrogen atom in a ring may have a substituent; Y represents an n-valent substituted or unsubstituted alkylene or aralkylene residue; and n represents an integer of 2 to 4. This plate has high sensitivity and resolving power and from this plate a printing plate of high printing endurance and low printing strain can be made.

Abstract: A layered photoresponsive imaging member comprised of a supporting substrate; a photogenerator layer comprised of a mixture of first and second pigments; and an aryl amine hole transport layer, said mixture comprised of perylenes and phthalocyanines; polycyclic quinones and phthalocyanines; and perinones and phthalocyanines.

Abstract: There is disclosed an electrophotographic sensitive layer which is provided with a single-layer type sensitive layer containing a specific perylene type compound as an electric charge generating substance, a specific diamine derivative of the following general formula as an electric charge transferring substance, and a binding resin. ##STR1## wherein R.sup.5, R.sup.6, R.sup.7, and R.sup.

Abstract: Method and composition for a sulfonyl-containing styrene derivative of the general formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and denote hydrogen, optionally halogen-, hydroxyl-, cyano- or (C.sub.1 -C.sub.4 -alkoxy mono- or poly-substituted (C.sub.1 -C.sub.8)-alkyl or phenyl, R.sub.3 denotes hydrogen or a (C.sub.1 -C.sub.4)-alkyl or -alkoxy group, n is a number from 1 to 4 or R.sub.1, R.sub.2 and R.sub.3 together with the associated aminophenyl radical denote julolidinyl or N-(C.sub.1 -C.sub.3)-alkylcarbazol-3-yl, R.sub.4 and R.sub.5 denote hydrogen or the necessary valences for forming a condensation product with formamide derivatives, and R.sub.6 denotes a cyano group, or R.sub.4 denotes hydrogen and R.sub.5 and R.sub.6 together denote the grouping C.dbd.N--R.sub.7, with R.sub.7 being a benzoyl radical which is unsubstituted or substituted by (C.sub.1 -C.sub.4)-alkyl or -alkoxy groups, halogen, cyno, amino or mono- or di-(C.sub.1 -C.sub.

Abstract: Cyanine dyes, particularly indocyanine dyes, having at least 7 carbon atoms in the polymethine chain which may possess a fused cyclopentene or cyclohexene ring in the form of a tri-iodide salt exhibit a substantial reduction in the propensity to associate compared to dyes having the identical cation but different anion. The tri-iodide salts are particularly useful as sensitizers in organic photoconductor systems.

Abstract: Compounds which are useful as sensitizers of photoconductors, having the general formula: ##STR1## in which: like symbols represent identical substituents,at least 4 of R.sup.1 to R.sup.9 represent hydrogen atoms and the remaining R.sup.1 to R.sup.9 pairs of groups independently represent:(i) hydrogen, an alkyl group having from 1 to 18 carbon atoms, a substituted alkyl group, or an aryl or substituted aryl group,(ii) a halogen atom, a cyano group, a carboxy or alkoxycarbonyl group, a hydroxy group, an alkoxy group, a nitro group or a sulfonic acid group, providing that not more than two such groups (ii) are present in each ring,(iii) an acylamino group, a secondary acylamino group or a tertiary amino group in which the pendant substituent groups on the nitrogen atom are alkyl, aryl or aralkyl, providing not more than two such groups (iii) may be present in each benzocarbazole ring, and(iv) any two groups R.sup.1 to R.sup.

Abstract: The present invention provides a photosensitive member having a charge transporting layer containing a new enamine compound which has a specific substituent on the terminal carbon of the enamine bone, which give an excellent charge transportability.

Abstract: The present invention relates to a photosensitive member, which comprises enamine compounds having a specific substituent on the nitrogen atom constituting the enamine bone, and has an excellent charge transportability.

Abstract: An electrophotographic member has an electrophotographic substrate and a light receiving layer having (i) a 0.01 to 10 .mu.m thick charge injection inhibition layer, (ii) a 1 to 100 .mu.m thick photoconductive layer and (iii) a 0.003 to 30 .mu.m thick surface layer. The charge injection inhibition layer includes a polycrystal material containing silicon atoms as the main constituent, 30 to 5.times.10.sup.4 atomic ppm of a conductivity controlling element of Group III and Group V elements uniformly or nonuniformly distributed in the thickness direction and 1-40 atomic % of hydrogen atoms and/or halogen atoms. The photoconductive layer is an amorphous semiconductor material containing silicon atoms as the main constituent and 1-40 atomic % of hydrogen atoms and/or halogen atoms. The surface layer includes an amorphous material: A--(Si.sub.x C.sub.1-x).sub.y :H.sub.1-y wherein x is 0.1 to 0.99999 and y is 0.6 to 0.999.

Abstract: The present invention relates to a photosensitive member containing a specific hydrazone compound for a charge transporting agent, which is improved in sensitivity, chargeability, resistivity over repeated use and stability.

Abstract: A photosensitive member according to the present invention comprises an electrically conductive substrate and a photosensitive layer comprising a binder resin and a styryl compound dispersed therein and represented by the general formula (I), ##STR1## wherein R.sub.1, R.sub.3 and R.sub.5 each represent hydrogen or an alkyl, aryl, aralkyl or heterocyclic group, the aryl, aralkyl and heterocyclic groups having or not having a substituent, R.sub.2, R.sub.4 and R.sub.6 each represent a substituted or unsubstituted aryl, aralkyl or heterocyclic group, R.sub.1 and R.sub.2, R.sub.3 and R.sub.4, and R.sub.5 and R.sub.6 taken together form a ring, and R.sub.7, R.sub.8 and R.sub.9 each represent hydrogen or an alkyl, alkoxyl, aralkyl or aryl group.A photosensitive member of this structure exhibits high sensitivity, is outstanding in the ability to retain charges and in charge transporting ability and less prone to deterioration when repeatedly used.

Abstract: Disclosed is a photoreceptor for electrophotography comprised of a charge carrier generating material and charge transport material wherein one charge generating material is a metal phthalocyanine or a metal-free phthalocyanine. The layer containing the generator material also contains an organic amine.

Abstract: 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.

Abstract: Polyimide-electron donor charge transfer complexes, supported or unsupported, as photoconductive elements characterized by photoconductivities in excess of the sum of the individual photoconductivities of the polyimide and electron donor components.

Abstract: 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.

Abstract: An electrophotographic recording material comprising an electrically conductive base material and at least one photoconductive layer containing an organic photoconductor, a binder, and at least one sensitizing dye represented by the formula ##STR1## wherein n denotes 2 or 3 and X.sup.- denotes a monovalent anion. The sensitizing dye has a sensitization maximum between 650 and 840 nm.

Abstract: An electrophotographic recording material is disclosed comprising an electrically conductive support, a photoconductive layer and, optionally, an insulating barrier layer between the substrate and photoconductive layer. The photoconductive layer comprises at least one organic, n-type conducting pigment in a concentration between 10 and 50, preferably between 15 and 30, percent by weight, relative to the photoconductive layer weight, at least one electronically inert, carbonyl group-containing binder and an organic, p-type conducting photoconductor in a concentration from 0 to 20, preferably from 2 to 8 percent by weight, relative to the photoconductive layer weight. The n-type conducting pigment preferably comprises a compound selected from the trans-perinones, the perylene-tetracarboxylic acid diimides, and the condensed quinones.

Abstract: Disclosed are compounds of the formula ##STR1## wherein n is 1 or 2; R.sup.1 and R.sup.2 are alkyl or aralkyl; R.sup.3 is alkyl; when n is 1, R.sup.4 is alkyl, aralkyl, alkenyl, aralkenyl, aryl or a polyether radical having up to 10 ether groups; and when n is 2, R.sup.4 is alkylene, aralkylene, alkenylene, aralkenylene, arylene or a divalent polyether radical having up to 10 ether groups. The compounds are highly efficacious organic photoconductors for use in electrophotography, exhibiting improved pre-exposure fatigue resistance and blooming properties as compared with known photoconductors. Photoconductive elements containing these compounds are also described.

Abstract: The photoconductor of an electrophotographic recording material comprising an electrically conductive support, an optional insulating interlayer, and a photoconductive single layer containing a binder, a dye or pigment sensitizer and a pyrimido[5',4':5,6]pyrido[1,2-a]benzimidazole charge transporting compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and are hydrogen or an R.sub.3,R.sub.4 N group; R.sub.3 and R.sub.4 are identical or different and are (C.sub.1 to C.sub.4)-alkyl, hydroxy-(C.sub.1 to C.sub.4)-alkyl, phenyl or benzyl which are unsubstituted or (C.sub.1 to C.sub.4)-alkyl-substituted, or, together with the N atom to which they are bonded, are an imidazolyl or triazolyl group; and R.sub.5 is a benzothiazole, a benzoxazole or a benzimidazole group, is photosensitive in the visible range around 430 to 500 nm and can be sensitized for the longer-wavelength region with dyes.

Abstract: An electrophotographic photosensitive material is disclosed, containing (1) an organic photoconductive substance, and (2) at least one of a specific type of pyrylium compound, and, optionally (3) at least one of a specific type of amide compound. The material exhibits high sensitivity in a wavelength region of a semi-conductor laser and is stable to heat and humidity.

Abstract: In an electrophotographic recording material comprising an electrically conductive base material and at least one photoconductive layer containing a photoconductor, a binder and at least three sensitizing dyes of which at least two are 3,3'-dimethylindolenine compounds, such as bis-(3,3'-dimethylindolenyl)-trimethinecyanines and -pentamethinecyanines, having a sensitizing action in different wavelength regions, it is possible to sensitize various organic and inorganic photoconductors within the range from about 400 to 700 nm.

Abstract: A hydrazone compound useful in phthalocyanine photoreceptors to provide them with excellent sensitivity and repeat stability and low residual voltage invention has the following formula: ##STR1## wherein X and Y independently represent a hydrogen atom, a lower alkyl, methoxy or ethoxy group, Z represents a lower alkyl, benzyl, hydroxyl, lower alkoxy, phenoxy or benzyloxy group, Z' represents a hydrogen atom, an alkyl group or an alkoxy group, and R represents a lower alkyl group, an aryl group which may have a substituent, or a benzyl group.

Abstract: Novel 4H-tellurin compounds are disclosed. The compounds are useful as electron-accepting sensitizers for electron-donating photoconductive-compositions.

Abstract: Photoconductive films contain specified azulenium salt compounds. Electrophotographic photosensitive members are provided with a photoconductive film containing at least one of the specified azulenium salt compounds.

Abstract: 2- or 2,3-substituted 5,6,11,12-tetraseleneotetracene or -tetrathiotetracene of the formula ##STR1## in which X is S or Se, R is alkoxy, hydroxyalkoxy, aryloxy, cycloalkoxy, aralkoxy, --OH, --NH.sub.2, --Cl, --Br or substituted amino and Y is hydrogen or --COR. The compounds can be bonded as side groups to polymers. The polymers and the compounds combine with electron acceptors to form charge transfer complexes which can be used as electrically conductive layers.

Abstract: An electrophotographic recording material is described which comprises an electrically conductive support and a photoconductive layer comprising a photoconductor, a binder, and at least one bis-benzothiazole-pentamethine-cyanine having a particular structure. The aforementioned recording material displays a sensitization peak in the range between about 680 nm and 710 nm, and can be processed under visual control using bright safelights.

Abstract: Disclosed is a light-sensitive member for electrophotography, having a charge generating phase formed by coating a dispersion comprising a charge generating substance, which contains in said charge generating phase an amine in an amount of 20-fold moles or less per mole of said charge generating substance and the solvent. Also disclosed are useful methods for the preparation of such a light-sensitive member.

Abstract: Photoconductive organic polymers useful in the preparation of photodetectors and photoconductive devices comprise a transrich polyphenylacetylene. The photoconductive properties may be further enhanced by the addition of an electron-acceptor dopant, and sensitized to selected spectral regions by the addition of a selected dye.

Abstract: A photosensitive composition for electrophotography comprising polyvinyl carbazole, a charge-generating organic pigment, and as a sensitizing agent a silicone oil, thereby enhancing the sensitivity of the resulting photosensitive layer and improving the aging characteristic thereof.

Abstract: An article having improved electrostatic charge transfer properties. The improvement in charge transfer properties results from subjecting a layer of photoconductive-insulative material or dielectric material on the charge donor or a layer of dielectric material on the charge receptor, or both layers, to plasma treatment process to provide an oxygen-enriched surface to the photoconductive-insulative layer and/or the dielectric layer.

Abstract: A photoconductive composition comprises a photoconductor and a sensitizer. The sensitizer has the formula ##STR1## wherein R represents alkyl; R1 represents H, alkyl or aryl; R2 represents the atoms required to complete a hetero or carboxyclic ring; A.sup.- represents an anion; and n represents the valency of the anion. The composition is sensitive to both laser light sources and tungsten light sources and is useful in electrophotographic reproduction.

Abstract: An electrophotographic process involving charging and exposing to light a radiation sensitive organic thin film comprising a compound which has at least one nucleus of an azulenium salt.

Abstract: An electrophotographic plate comprising an electroconductive layer, a charge generating layer and a charge transport layer and containing a silane coupling agent at least in the charge generating layer or in the charge transport layer, or at the interface of the charge generating layer and the charge transport layer shows small dark decay, little light fatigue and high sensitivity.

Abstract: The present invention discloses an electrophotographic recording material comprising an electrically conductive support and at least one photoconductive layer which comprises an organic photoconductor, for example, oxazole derivatives or oxadiazole derivatives, a sensitizing dye, a binder, and customary additives. The sensitizing dye contained in the photoconductive layer comprises a compound corresponding to the general formula ##STR1## wherein R is chlorine or bromine,m is 1 or 2,R.sub.1 is an alkyl group having from 1 to 3 carbon atoms,R.sub.2 is --(CH.sub.2).sub.n --SO.sub.3 H or --(CH.sub.2).sub.2 --COOH,R.sub.3 is --(CH.sub.2).sub.n --SO.sub.3 -- or --(CH.sub.2).sub.2 --COO-- andn is 3 or 4.

Abstract: An electroconductive porous film is described comprising a porous film substrate having deposited thereon an electroconductive organic polymer containing an electron acceptor as a doptant, substantially comprising a linear polymer having as a main repeating unit thereof a quinonediimine structure represented by formula (III). ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, each represents a hydrogen atom or an alkyl group.

Abstract: An electrophotographic recording material consists of (A) an electrically conductive base and (B) a photoconductor layer containing (a) a polymeric binder, which either is itself capable of transporting charge carriers or contains charge carrier-transporting compounds, and (b) sensitizers, with or without (c) other additives conventionally used in photoconductor layers.Compounds (c), used according to the invention are compounds of the formula ##STR1## where R.sup.1 is H or C.sub.1 -C.sub.8 -alkyl, R.sup.2 is C.sub.1 -C.sub.8 -alkyl, Hal is Cl or Br and n is an integer from 2 to 6. The compounds (IV) are present as a molecular-disperse solution in the polymer matrix.The recording materials are highly photosensitive over the entire visible range of light, and are therefore very useful for reprographic purposes.

Abstract: Electrophotographic recording materials which comprise an electrically conductive base, charge carrier-producing compounds or sensitizers, charge carrier-transporting compounds and added metal-1,3-diketone complexes and possess high photosensitivity and low conductivity in the dark are used for reprographic purposes and for the production of electrophotographic printing plates, in particular offset printing plates.

Abstract: Phosphorous diketonate electron accepting compounds are disclosed for use as sensitizers in electron donating photoconductive compositions. Methine dyes having a phosphorous diketonate component and a method of making same are also disclosed.

Abstract: An electrophotographic photosensitive member constructed with a layer comprising an electron acceptor and a layer comprising an electron donor, both layers being supported by an electrically conductive substrate with themselves superposed upon each other to form a thin layer of charge-transfer complex at the interface between the two layers.