Abstract: New electrophotographic elements contain electron-transport agents comprising certain chemical compounds, which are derivatives of certain substituted 9,10-anthraquinones in which the keto oxygens have been replaced by cyanoimino groups.

Abstract: An electrophotographic apparatus comprises at least a charging means, an imagewise exposure means with a laser beam having a spot diameter of 100 um or less, a developing means, a transferring means and a cleaning means arranged around an electrophotographic photosensitive member, and said electrophotographic photosensitive member comprises a charge generation material and a charge transport material comprising an organic photoconductive material and has a surface layer containing said charge transport material, wherein the absorption end of visible to UV spectroscopic absorption of the surface layer is substantially unchanged by exposure to nitric acid vapor for 10 minutes; an electrophotographic image forming process; and an electrophotographic photosensitive member.

Abstract: Novel squarylium compounds, a process for the production thereof as well as to a photoreceptor for electrophotography containing the squarylium compound are disclosed, said squarylium compounds being represented by formula (I) or (II): ##STR1## wherein X is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a hydroxyl group, an alkoxy group having 1 to 4 carbon atoms, or a halogen atom; Y is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms a hydroxyl group or an alkoxyl group having 1 to 4 carbon atoms.

Abstract: Unsymmetrical squaraine compounds such as substituted dialkylaminophenylalkoxyaryl squaraines, and imaging members comprised of the aforementioned squaraines.

Abstract: A photoconductor for electrophotography comprises a novel disazo compound as a charge generating substance. A disazo compound is represented by the following general formula: ##STR1## wherein, each of Ar.sub.1 and Ar.sub.2 stands for an aromatic hydrocarbon group or an aromatic heterocyclic group, both of which may have a substituent(s),each of R.sub.1 and R.sub.2 stands for an hydrogen atom or an alkyl group or an aryl group, a heterocyclic group which may have a substituent(s); andC.sub.p stands for a coupler residual group.

Abstract: A hydroxy arylamine compound is disclosed represented by the formula: ##STR1## wherein: m is 0 or 1,Z is selected from the group consisting of: ##STR2## n is 0 or 1, Ar is selected from the group consisting of: ##STR3## R is selected from the group consisting of --CH.sub.3, --C.sub.2 H.sub.5, --C.sub.3 H.sub.7, and --C.sub.4 H.sub.9,Ar' is selected from the group consisting of: ##STR4## X is selected from the group consisting of: ##STR5## s is 0, 1 or 2, the dihydroxy arylamine compound being free of any direct conjugation between the --OH groups and the nearest nitrogen atom through one or more aromatic rings. The dihydroxy arylamine compound may be employed in an electrophotographic imaging member and the member may be used in an electrophotographic imaging process.

Abstract: Disclosed are a photoconductive composition containing a new bisazo compound of the following formula (1) and an electrophotographic photoreceptor having a photosensitive layer which contains the bisazo compound of the formula (1): ##STR1## wherein Z, B.sub.1, B.sub.2, A, and L are defined hereinafter. The electrophotographic photoreceptor has both high sensitivity and high durability, and the sensitivity thereof is barely lowered even after repeated use.

Abstract: An electrophotographic photosensitive member has a photosensitive layer on an electroconductive support, characterized in that the photosensitive member contains an azo pigment having an organic residue represented by the formula (I).

Abstract: An electrophotographic photosensitive material is disclosed, wherein the electrophotographic photosensitive material comprises a photosensitive layer containing at least one thiophene compound selected from the group consisting of compounds having the general formulae (I) and (II): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, and R.sup.21, R.sup.22, R.sup.23, R.sup.24, R.sup.25 ; and R.sup.26 each represents a hydrogen or halogen atom or a hydroxy group, an alkyl group, a hydroxyalkyl group, an alkoxy group, an allyl group, a vinyl group, an acyl group, a formylalkyl group, an acyloxy group, an alkoxycarbonyl group, an aryl group, a cyano group, a nitro group, an amino group, an alkylamino group or an arylamino group and n is an integer of 1, 2, 3, 4 or 5.

Abstract: An electrophotographic photosensitive material is disclosed, wherein the electrophotographic photosensitive material comprises a photosensitive layer containing at least one hydrazone compound selected from the group consisting of compounds having the general formulae (I) and (II): ##STR1## wherein R.sup.1 is a hydrogen or halogen atom or an alkyl group, an alkoxy group, a nitro group, an acyl group or an amino group and R2 and R3 each represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group; ##STR2## wherein R.sup.4 and R.sup.5 each represents a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group and X is a group of the formula ##STR3## in which R.sup.6 to R.sup.

Abstract: An electrophotographic photoconductor is disclosed which comprises an electroconductive support material and a photosensitive layer comprising at least one of the stilbene compounds of the formula ##STR1## wherein R.sup.1 represents hydrogen or ##STR2## R.sup.2 represents hydrogen, an alkyl group or a substituted or unsubstituted phenyl group; A represents ##STR3## when R.sup.1 is hydrogen; while, when R.sup.1 is ##STR4## A represents ##STR5## a 9-anthryl group or a substituted or unsubstituted N-alkylcarbazolyl group, wherein R.sup.3 represents hydrogen, an alkyl group, an alkoxy group, a halogen or a substituted amino group represented by ##STR6## in which R.sup.4 and R.sup.5 independently represent an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, and R.sup.4 and R.sup.5 may form a ring in combination, and m is an integer of 0 through 3 and n is an integer of 0 or 1, provided that, when R.sup.1 is hydrogen and n=0, A is ##STR7## in which R.sup.

Abstract: A layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and a hole transport layer comprised of novel bis(diarylamino)fluorenes of the formula: ##STR1## where R and R' are independently selected from the group consisting of hydrogen, alkyl, and substituted alkyl groups; and Ar and Ar' are independently selected from the group consisting of aryl and substituted aryl substituents.

Abstract: A photoconductive imaging member comprised of a supporting substrate; a photogenerating layer comprised of a bisazo compound of the formula ##STR1## wherein Cp is an azoic coupler selected from the group consisting of ##STR2## wherein Ar is an aromatic substituent; and a charge transport layer.

Abstract: A function separated type electrophotographic photosensitive member for infrared rays comprises a combination of a charge generation material and a charge transport material, wherein the electrophotographic photosensitive member for infrared rays contains as the charge generation material a disazo pigment represented by Formula (1).

Abstract: A photosensitive member for electrophotography comprises a photosensitive layer containing a trisazo pigment represented by the formula: ##STR1## wherein Ar.sub.1 is a pyridylene group capable of having a substituent; Ar.sub.2 and Ar.sub.3 are respectively a pyridylene group or an arylene group each capable of having a substituent; and A is a coupler residue having a phenolic OH group. Because the trisazo pigment has a characteristic central skeleton including the central nitrogen atom and an adjacent pyridylene group, the photosensitive member has a sensitivity region expanded to the near-infrared region and shows a stable charging characteristic during a continuous electrophotographic operation.

Abstract: The present invention relates to a photo sensitive member containing a specific azo compound for a charge generating agent, which is improved in photosensitive properties, in particular, sensitivity.

Abstract: Disclosed is an improved layered photoresponsive imaging member comprised of a supporting substrate; an imidazole perinone comprised of components with a mixture of cis and trans isomers of Formulas III, IV, and V, including trans indanthrene Brilliant Orange, cis indanthrene Bordeaux Red; bis(4,5-dimethyl)benzimidazole perinone and bis 2,3 naphthimidazole perinone, and an aryl amine hole transport layer comprised of molecules of the following formula: ##STR1## dispersed in a resinous binder and wherein X is selected from the group consisting of halogen and alkyl.

Abstract: Disclosed herein is a electrophotographic photoreceptor having high sensitivity and excellent durability. The photoreceptor has a photosensitive layer which contains an azo compound having the tetraphenylthiophene or tetraphenylthiophene-1,1-dioxide skeleton.

Abstract: Disclosed herein is an electrophotographic photoreceptor having high sensitivity and excellent durability. The photoreceptor has a photosensitive layer which contains at least one bisazo compound having the 2-phenyl-benzooxazole skeleton.

Abstract: An electrostatographic imagining member and an electrophotographic imaging process for using the imaging member are disclosed in which the imaging member comprises a substrate and at least one electroconductive layer, the imaging member comprising a polymeric arylamine compound represented by the formula: ##STR1## wherein: n is between about 5 and 5,000,m is 0 or 1,Z is selected from certain specified aromatic and fused ring groups,Ar is selected from certain specified aromatic groups,R is selected from certain specified alkyl groups,Ar' is selected from certain specified aromatic groups, andR' and R" are independently selected from certain specified alkylene groups.

Abstract: A transparent electrophotographic photoreceptor comprising a conductive support having provided thereon a photosensitive layer is disclosed, wherein said photosensitive layer contains a combination of at least one of specific hydrazone compounds and at least one of specific benzidine compounds as photoconductive substances. These photoconductive substances are prevented from crystallization and precipitation on the surface of the photoreceptor so that the photoreceptor exhibits satisfactory stability before and after image formation even when preserved for long periods of time or under a high temperature condition.

Abstract: In accordance with the present invention there is provided an organic compound having the formula selected from the group consisting of: ##STR1## wherein x is an integer from 0 to 2, y is an integer from 1 to 6, and z is an integer from 0 to 2; ##STR2## wherein L is aliphatic, alicyclic or aromatic and a is an integer from 2 to 6; and wherein G has the formula ##STR3## wherein n is an integer from 0 to 6 and Q.sub.1, Q.sub.2, Q.sub.3, Q.sub.5, Q.sub.6, and Q.sub.7, which may be the same or different, represent H or CH.sub.3, and Q.sub.4 represents H or CH.sub.3 when x and z are 0 or n is greater than 0, or Q.sub.4 represents CH.sub.3 when x or z are 1 or 2 and n is 0.The compounds, which exhibit unexpectedly high T.sub.g and unexpectedly high resistance to oxidation, are useful in electrophotographic elements.

Abstract: An electrophotographic photosensitive member comprises a photosensitive layer on a substrate, said photosensitive layer comprising a disazo pigment represented by the formula (1).

Abstract: A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.

Abstract: An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the following general formulae (1) to (5): ##STR1## wherein groups Ar are arylene groups and divalent heterocyclic groups, each of which may contain a substituent; n is 0 or 1; and group A is a coupler residue group having a phenolic OH group.

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: A photoconductive imaging member containing a supporting substrate, certain azo pigments of 2,7-bis(1'-azo-2'-hydroxy-3'-naphthanilide)naphthalene and the derivatives thereof, and a hole transport layer. The aforementioned disposable imaging members are particularly useful in electrostatographic imaging and printing apparatuses in that they enable high quality images of excellent resolution, and wherein the electrical properties of the resulting imaging members are substantially stable over extended time periods.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor contains a specific styryl dye in which the tertiary amino moiety is substituted with aryl groups and a specific organic photoconductive compound in which the nitrogen atoms are substituted with aryl groups. The photoreceptor exhibits high sensitivity and excellent preservation stability and heat stability.

Abstract: Novel squarylium compounds, a process for the production thereof as well as to a photoreceptor for electrophotography containing the squarylium compound are disclosed, said squarylium compounds being represented by formula (I): ##STR1## wherein R is a straight-chain alkyl group having 2 or more carbon atoms or --C.sub.2 H.sub.4 X, wherein X is a hydroxyl group, a halogen atom or the group --OR.sub.1 wherein R.sub.1 is an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted phenyl group.

Abstract: This invention relates to an electrophotographic photosensitive member utilizing a novel electrophotographic photosensitive material, more particularly to an electrophotographic photosensitive member endowed with high sensitivity as well as excellent potential stability during repeated copying by incorporating an azo pigment having a specific molecular structure in the photosensitive layer.

Abstract: Novel squarylium compounds, a process for the production thereof as well as to a photoreceptor for electrophotography containing the squarylium compound are disclosed, said squarylium compounds being represented by formula (I): ##STR1## wherein R is a straight-chain alkyl group having 2 or more carbon atoms or --C.sub.2 H.sub.4 X, wherein X is a hydroxyl group, a halogen atom or the group --OR.sub.1 wherein R.sub.1 is an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted phenyl group.

Abstract: A photoreceptor comprising a support and thereon a photosensitive layer containing an azo compound.

Abstract: An electrophotographic photosensitive member having a conductive substrate and a photosensitive layer, which is characterized in that the photosensitive layer comprises a binder and at least one hydrazone compound represented by the following general formula (1) or (2): ##STR1## In the formula; R.sub.11 and R.sub.12 independently of each other represent alkyl, aralkyl, or phenyl, each substituted or unsubstituted, or R.sub.11 and R.sub.12 form a 5- or 6-membered ring residue conjointly with the nitrogen atom to which they are bonded; R.sub.13 and R.sub.14 independently of each other represent alkyl or alkoxy; R.sub.15 and R.sub.16 independently of each other represent alkyl, aralkyl, or aryl, wherein the aralkyl and the aryl are substituted or unsubstituted; and n represents a integer of 0 or 1. ##STR2## In the formula; R.sub.21 and R.sub.22 independently of each other represent alkyl, aralkyl, or phenyl, each substituted or unsubstituted, or R.sub.21 and R.sub.

Abstract: Disclosed for incorporation in imaging members are novel aromatic ether compositions of the formula R--X--R.sub.1, wherein R and R.sub.1 are independently selected from arylamino and substituted arylamino groups, and X is selected from the group consisting of oxygen, sulfur, selenium, and tellurium. Also disclosed are photoresponsive imaging devices containing a photogenerating layer and in contact therewith a hole transport layer comprised of the aromatic ethers illustrated herein.

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: An electrophotographic material comprises a conductive support and a light-sensitive layer containing at least one of the azo compound of the formulas [I]-[III]:formula [I]:Cp.sub.1 --N.dbd.N--A--N.dbd.N--Cp.sub.2A represents a divalent residue which bonds through C atoms to N atoms which constitute azo and Cp.sub.1 is a group of by the formula: ##STR1## Z represents a substituted or unsubstituted carbocyclic aromatic ring, a substituted or unsubstituted heterocyclic aromatic ring or a unsaturated monocyclic hydrocarbon ring and R represents an aryl group containing one or two CF.sub.3 groups and Cp.sub.2 is a coupler residue different from said Cp.sub.1 and is selected from following formulas (a)-(f): ##STR2## Z.sup.1 and Z.sup.2 represent a substituted or unsubstituted aromatic hydrocarbon ring or substituted or unsubstituted hetero ring, R.sup.1 and R.sup.2 represent substituted or unsubstituted alkyl, aralkyl, aryl or hetero ring group, R.sup.3 represents an alkyl or carboxyl group or an ester thereof, R.

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: Novel squarium compounds which have a flat photosensitivity in the wide range from visible ray region to the near infrared ray region as a charge generator and which can be prepared by reacting squaric acid and an aniline derivative, and electrophotographic photoreceptors containing the squarium compounds are disclosed.

Abstract: Disclosed are unsymmetrical squaraine compounds of the following formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting of alkyl, aryl heterocyclic, benzyl, and halobenzyl; and X.sub.1, X.sub.2 and X.sub.3 are independently selected from the group consisting of hydrogen, alkyl, halogen, carboxy, and hydroxy; and photoresponsive imaging members having incorporated therein the aforementioned squaraine compounds.

Abstract: Disclosed are fluorinated squaraine compounds of the following formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are independently selected from the group consisting of alkyl, aryl, and heterocyclic substituents.

Abstract: Polymeric dyes having pendent chromophore groups which are selected from azo, tricyanovinyl, anthraquinone, methine, and indoaniline groups fall into two classes, [A] condensation polymers, and [B] polymers derived from copolymerized ethylenically-unsaturated monomers, the dyes being capable of undergoing thermoplastic deformation by a focused laser beam when in a layer of thickness in the range of 0.1 to 100 micrometers and having an absorptivity in the range of 10 to 250 Lg.sup.-1 cm.sup.-1. They are film-forming, thermally- and light-stable, and solvent-coatable. These compounds are useful as coloring and light-absorbing agents, particularly as the light-absorbing agents in thin optical recording layers.

Abstract: 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.

Abstract: An improved process for the preparation of mixed squaraine compositions which comprises reacting squaric acid, an aromatic amine, and a fluoroaniline, in the presence of an aliphatic alcohol, and an optional azeotropic substance.

Abstract: An unsymmetrical squaraine composition, process for synthesizing the unsymmetrical squaraine composition, devices containing the unsymmetrical squaraine composition, and methods of using the devices. The process for synthesizing the unsymmetrical squaraine composition comprises forming a mixture comprising squaric acid, a long chain primary alcohol, a first tertiary amine, and a second tertiary aromatic amine different from the first tertiary aromatic amine, and heating the mixture in vacuo below the boiling points of the primary alcohol, the first tertiary amine and the second tertiary aromatic amine to form an unsymmetrical squaraine composition. The novel unsymmetrical squaraine composition synthesized by this process may be used in electrostatographic imaging members comprising a supporting substrate and a photoconductive layer comprising the novel unsymmetrical squaraine composition. These electrostatographic imaging members may be utilized in an electrostatographic imaging processes.

Abstract: Styryl derivatives of the formula ##STR1## an electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer comprising at least one styryl derivative of the same formula are disclosed, in which R.sup.1 is selected from the group consisting of an alkyl group, a substituted alkyl group, an aryl group and substituted aryl group; R.sup.2 is selected from the group consisting of hydrogen, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; and Ar represents an aryl group or a substituted aryl group.

Abstract: An electrophotographic photosensitive material has a photosensitive layer formed on an electroconductive substrate, with the photosensitive layer containing a polymeric binder and an organic photoconductor represented by the following formulaA--CH.dbd.CH).sub.n CH.dbd.NNHYwherein A is selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 14 carbon atoms, an aryl group having 6 to 20 carbon atoms and a heterocyclic residue of a 3- to 30- membered ring,wherein n is 1 or 2,Y is selected from the group consisting of --SO.sub.2 R', ##STR1## wherein R' is selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 14 carbon atoms, an aryl group having 6 to 20 carbon atoms and a heterocyclic residue of a 3- to 30- membered ring, and R.sup.2 and R.sup.3, R.sup.4 and R.sup.5, either form a ring together with the nitrogen atom to which R.sup.2 and R.sup.3, R.sup.4 and R.sup.5 are bonded and in this case R.sup.

Abstract: Styrene derivatives of the formula ##STR1## and an electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer comprising at least one styrene derivatives of the same formula are disclosed, in which Ar represents an unsubstituted of substituted phenyl group or an unsubstituted or substituted styryl group, R represents hydrogen, a lower alkyl group or an unsubstituted or substituted phenyl group, and A is selected from the group consisting of ##STR2## wherein R.sup.1 represents a lower alkyl group or a lower alkoxy group, R.sup.2 and R.sup.3 each represent a lower alkyl group, an aralkyl group, or an unsubstituted or substituted phenyl group.

Abstract: An electrophotographic light-sensitive material is described, comprising, provided on an electrically conductive support, a light-sensitive layer containing at least one hydrazone compound selected from particular groups of hydrazone compounds.

Abstract: 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.

Abstract: An electrophotographic imaging member comprising a substrate, a ground plane layer comprising a titanium metal layer contiguous to the substrate, a charge blocking layer contiguous to the titanium layer, a charge generating binder layer and a charge transport layer. This photoreceptor may be prepared by providing a substrate in a vacuum zone, sputtering a layer of titanium metal on the substrate in the absence of oxygen to deposit a titanium metal layer, applying a charge blocking layer, applying a charge generating binder layer and applying a charge charge transport layer. If desired, an adhesive layer may be interposed between the charge blocking layer and the photoconductive insulating layer.