Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, and a charge transport layer, where the charge generating layer includes a photogenerating material and a hydroxyl group-containing polymeric compound.

Abstract: An electrophotographic imaging member includes a substrate, a charge generating layer, and a charge transport layer, where the charge generating layer includes a photogenerating material, a film-forming polymer binder, and a glycol compound having two hydroxyl groups bonded to adjoining carbon atoms in the carbon chain.

Abstract: An organophotoreceptor and an electrophotographic imaging apparatus including the organophotoreceptor are provided. The organophotoreceptor provides an excellent image quality by preventing an optical fatigue and a thermal fatigue occurring when repeatedly used. The organophotoreceptor includes a conductive support, an undercoat comprising a metal oxide and antioxidant dispersed in a binder, a charge generation layer comprising a phthalocyanine-based pigment, and a charge transport layer.

Abstract: An imaging member including a substrate; thereover a charge generation layer comprising a thiophosphate; and at least one charge transport layer positioned on the charge generation layer.

Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the photogenerating layer contains a titanyl phthalocyanine prepared, for example, by dissolving a Type I titanyl phthalocyanine in a solution comprising a trihaloacetic acid and an alkylene halide; adding the mixture comprising the dissolved Type I titanyl phthalocyanine to a solution comprising an alcohol and an alkylene halide thereby precipitating a Type Y titanyl phthalocyanine; and treating the Type Y titanyl phthalocyanine with a monohalobenzene.

Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component wherein the at least one charge transport component is comprised of aryl amine molecules of the formula wherein X and Y are each independently alkyl, alkoxy, aryl, a halogen, and wherein the photogenerating layer contains a titanyl phthalocyanine prepared by dissolving a Type I titanyl phthalocyanine in a solution comprising a trihaloacetic acid and an alkylene halide; adding the mixture comprising the dissolved Type I titanyl phthalocyanine to a solution comprising an alcohol and an alkylene halide thereby precipitating a Type Y titanyl phthalocyanine; and treating the Type Y titanyl phthalocyanine with monohalobenzene.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one polyphenyl thioether of the formula wherein R1, R2, and R3 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, aryl, alkoxy, and halogen; n is a number of from about 1 to about 10; and a thiophosphate.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer, and wherein the at least one charge transport layer contains at least one thiophosphate, and wherein the thiophosphate is present in an amount of from about 0.005 to about 0.09 weight percent.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one polyphenyl ether of the formula wherein each R1, R2, and R3 is independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and n is from about 1 to about 10, and a thiophosphate.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, and wherein the at least one charge transport layer contains at least one thiophosphate.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one C-ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and the sum of n plus m (n+m) is from about 1 to about 10, and a thiophosphate.

Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer, at least one C-ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and the sum of n plus m (n+m) is from about 1 to about 10.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer of at least one charge transport component, at least one polyphenyl thioether of the formula wherein R1, R2, and R3 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen mixtures thereof, and n is a number of, for example, from about 1 to about 10.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer, and wherein said photogenerating layer contains at least one thiophosphate.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one polyphenyl ether of the formula wherein R1, R2, and R3 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and n is a suitable number of from about 1 to about 10.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer and at least one charge transport layer of at least one charge transport component, at least one C-ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and the sum of n plus m (n+m) is from about 1 to about 10, and an optional antioxidant; and wherein a thiophosphate is contained in the photogenerating layer.

Abstract: An imaging member containing an optional supporting substrate, a photogenerating layer, and at least one charge transport layer of at least one charge transport component, at least one polyphenyl ether of the formula wherein R1, R2, R3 and R4 are independently selected from the group consisting of hydrogen, alkyl, aryl, alkoxy, substituted alkyl, substituted aryl, substituted alkoxy, and halogen, and n is a number of from about 1 to about 10; and wherein a thiophosphate is contained in the photogenerating layer.

Abstract: An electrophotoconductive element which may be irradiated with laser light having a wavelength (?) of about 350-500 nm which contains titanylphthalocyanine (TiOPC), which may be polymorphic. The electrophotoconductive element may therefore include an electroconductive support, a charge generation layer containing TiOPC, a charge transport layer and a source of laser light having a wavelength of about 350-500 nm. The charge transport layer may also exhibit light transmitting properties over the indicated laser wavelengths.

Abstract: An image forming apparatus having an image bearing member having a substrate and a photosensitive layer having a charge generating layer and a charge transport layer, a charging device for uniformly charging the surface of the image bearing member, an irradiating device having a light source for irradiating the image bearing member to form a latent electrostatic image thereon, a developing device for developing the latent electrostatic image, a transfer device for transferring the developed image to a recording medium and a cleaning device for cleaning the surface of the image bearing member, wherein the charge transport layer contains a charge transport material represented by the following chemical formula, the light source emits light having a wavelength not less than 600 nm and the image bearing member is not irradiated with light having a wavelength less than 600 nm, wherein R1 and R2 independently denote a hydrogen atom, a substituted or non-substituted alkyl group, a substituted or non-substitute

Abstract: An imaging member is disclosed with a charge transport layer comprising a dimethyl terphenyl diamine having the structure of Formula (I): wherein n is an integer from 0 to about 18. The resulting imaging member has enhanced performance properties.

Abstract: An electrophotographic photoreceptor including a photosensitive layer which includes a titanyl phthalocyanine crystal having a major absorption peak at a wavelength of 780 nm±10 nm and a minor absorption peak having an intensity of ¾ or less of the major absorption peak at 690 nm±10 nm in the visible-infrared absorption spectrum and a distyryl compound having a predetermined structure. An electrophotographic image forming apparatus employing the electrophotographic photoreceptor is also provided. The electrophotographic photoreceptor and the electrophotographic image forming apparatus have good photosensitivity and charging properties and good stability over repeated charging obtained by using an optimum combination of a new crystal type of a highly photosensitive titanyl phthalocyanine and a distyryl compound which is a charge transporting material that is compatible with the titanyl phthalocyanine.

Abstract: A titanyl phthalocyanine crystal having an X-ray diffraction spectrum having a plurality of diffraction peaks in which a maximum diffraction peak is observed at a Bragg (2 ?) angle of 27.2°±0.2° and a diffraction peak is observed at a lowest Bragg (2?) angle of 7.3°±0.2° when a specific X-ray of Cu—K? having a wavelength of 1.514 ? irradiates the titanyl phthalocyanine crystal. A photoreceptor having a photosensitive layer including the titanyl phthalocyanine crystal is also provided.

Abstract: The present invention provides an organic electrophotographic photo-receptor having a conductive substrate and a photosensitive layer laid on the conductive substrate, wherein the photosensitive layer contains at least one ?-oxo bridged heterometal compound as a charge generating material. The organic electrophotographic photo-receptor has high photo-sensitivity, high stability, excellent durability on sensitivity and on electric potential, and has excellent organic photo-conductive property.

Abstract: A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile.

Abstract: A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, allyl glycidyl ether, hydroxy containing polymer.

Abstract: In a process for forming a nanoparticulate crystalline titanium phthalocyanine pigment composition, a titanium phthalocyanine pigment is contacted with substantially pure 1,1,2-trichloroethane (TCE) under conditions effective to convert the titanium phthalocyanine pigment to the nanoparticulate crystalline composition.

Abstract: An amorphous mixture consisting essentially of TiOFPc and TiOPc and containing more than 75 weight percent of substantially chlorine-free TiOPc is produced by forming a mixture of crude crystalline TiOFPc and crude crystalline, substantially chlorine-free TiOPc that contains less than 80 weight percent TiOPc, treating the mixture under conditions effective to form a substantially amorphous mixture of TiOFPc and TiOPc containing less than 75 weight percent TiOPc, which is then treated with water, and dried. A further amount of crude crystalline, substantially chlorine-free TiOPc sufficient to form a new mixture containing more than 75 weight percent of substantially chlorine-free TiOPc is added, and the new mixture is converted to a substantially amorphous mixture of TiOFPc and TiOPc. A nanoparticulate cocrystalline composition is obtained by forming a slurry in an organic solvent of the dried substantially amorphous mixture, and wet milling the slurry to form the cocrystalline composition.

Abstract: An electrophotographic image forming apparatus comprising: an electrophotographic photoreceptor comprising: an electroconductive substrate; a charge generation layer; and a charge transport layer in this order, a charger; an irradiator; an image developer; and a transferer applying an electric current not less than 65 ?A to the electrophotographic photoreceptor, wherein the charge generation layer comprises titanylphthalocyanine crystals having a CuK? 1.542 ? X-ray diffraction spectrum having plural diffraction peaks, wherein a maximum diffraction peak is observed at a Bragg (2 ?) angle of 27.2°; main peaks are observed at 9.4°, 9.6° and 24.0°; and a minimum diffraction peak is observed at 7.3°; and no diffraction peak is observed at an angle greater than 7.3° and less than 9.4°, wherein said angles may vary by ±0.2° and the minimum interval where no peak is observed between required peaks at 7.3 and 9.4 is 2.0 degrees absolute or more.

Abstract: A photoconductive imaging member comprised of a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is generated from a solution of a metal alkyloxide, an amino alkylsilane, an aminoalkoxy silane or an aminoalkyl alkoxy silane, a polymer binder, and an organic solvent.

Abstract: An electrophotographic article having a complex of charge generating material and at least one transfer material selected from the group consisting of electron transfer material and hole transfer material is formed by admixing the charge generating material, at least one transfer material, and an organic binder in a solvent to form a coatable dispersion comprising a complex of charge generating material and said at least one transfer material; and coating said coatable dispersion onto a conductive substrate to form a charge transfer layer on the electrophotoconductive article. A novel S-form titanyl oxyphthalocyanine is also preferred, the novel form displaying major peaks of Bragg's 2theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5±0.2 degrees, 9.7±0.2 degrees, 11.7±0.2 degrees, 13.5±0.2 degrees, (optionally at 21±0.2 degrees and/or 23.5±0.2 degrees,) 24.1±0.2 degrees, 26.4±0.2 degrees, and 27.3±0.2 degrees group.

Abstract: In a process for forming a self-dispersing crystalline phthalocyanine pigment composition of monodisperse nanoparticles, a mixture containing titanyl fluorophthalocyanines, unsubstituted titanyl phthalocyanine, and an organic monomeric dispersant but substantially free of organic solvents or inorganic salts is dry milled, thereby forming a substantially amorphous phthalocyanine pigment composition. The substantially amorphous composition is contacted with an organic solvent having a hydrogen bonding parameter gammac lower than about 8, thereby forming a self-dispersing cocrystalline phthalocyanine pigment composition of monodisperse nanoparticles containing titanyl fluorophthalocyanines and titanyl phthalocyanine, which can be used to form the charge generation layer of an electrophotographic element.

Abstract: A process for forming a cocrystalline mixture of titanyl phthalocyanine (TiOPc) and titanyl fluorophthalocyanine (TiOFPc) includes: dry milling a mixture of crude TiOPc and crude TiOFPc, thereby forming an amorphous pigment mixture of TiOPc and TiOFPc; and heating the amorphous pigment mixture at a temperature effective to form a cocrystalline composition comprising titanyl phthalocyanine (TiOPc) and titanyl fluorophthalocyanine (TiOFPc), the cocrystalline composition being characterized by an X-ray diffraction spectrum exhibiting intensity peaks at 7.2°, 12.9°, 16.3°, 22.3°, 24.6°, 26.2°, and 28.8° with respect to X-rays of Cu K?at a wavelength of 1.54 1 ? of the Bragg angle 2?.

Abstract: An electrophotographic photoconductor includes a photosensitive layer on a conductive substrate. The photosensitive layer contains a pigment that consists of crystallites composed of molecules having a titanylphthalocyanine structure, wherein a crystallite diameter of the pigment is not smaller than 20 nm and a primary particle diameter of the pigment is not larger than 500 nm.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.

Abstract: The subject application provides for a composition crystal comprising a phthalocyanine compound and an asymmetric phthalocyanine wherein a part of benzene ring in phthalocyanine structure is substituted with naphthalene ring, pyridine or pyrazine ring, is stable against crystal transfer such as agglomeration, precipitation, crystal growth, crystal habit transfer and crystal electric potential, and has good electric properties such as good sensitivity. When this composition crystal is used as a charge generation material in an electrophotographic receptor, the electrophotographic photoreceptor shows good sensitivity and good image quality without noise.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a metallic component and an electron transport component.

Abstract: In an electrophotographic apparatus including an electrophotographic photosensitive member around which a charger, an exposure device, a developing device and a transfer device are provided in this order and not having any charge elimination device between the transfer device and the charger the electrophotographic photosensitive member includes a support and a charge generation layer provided thereon containing a phthalocyanine compound and a charge transport layer, and has a light-area dark attenuation rate A and a dark-area dark attenuation rate B which satisfy the following expression (1): 1.0≦light-area dark attenuation rate A/dark-area dark attenuation rate B≦1.7  (1).

Abstract: A photoconductive imaging member containing a hole blocking layer, a photogenerating layer, a charge transport layer, and thereover an overcoat layer comprised of a polymer with a low dielectric constant and charge transport molecules.

Abstract: An electrophotographic photoconductor includes an electroconductive substrate, a charge generation layer, and a charge transport layer formed by using a halogen-free solvent, arranged in this order, in which the charge generation layer contains a charge generation material having an average particle diameter smaller than a surface roughness of a plane where the electroconductive substrate is arranged, and a polyvinyl acetal resin having a ratio Mw/Mn of a weight-average molecular weight Mw to a number-average molecular weight Mn is 2.2 or more.

Abstract: A crystalline phase of titanyl oxyphthalocyanine, referred to herein as the S-phase, has an internal blend of lattice arrangements is provided by treatment of the gamma-form of titanyl oxyphthalocyanine. The S-phase is a truly new phase, and not a mixture of particles of various phases (e.g., combinations of the beta-phase and the gamma-phase), with internal lattice distributions of atoms and molecules forming a new, non-continuous, non-uniform lattice structure. The x-ray spectrum shows a blend of diffraction peaks, having peaks that have previously been distinctly present only collectively among various crystalline forms of titanyl oxyphthalocyanine, but can now be provided in a single crystalline form. The visible spectra show significant absorption differences. The novel S-form titanyl oxyphthalocyanine is also used in a photoconductor displaying major peaks of Bragg's 2 theta angle to the CuK-alpha characteristic X-ray (wavelength 1.541 Angstrom) at least at 9.5±0.2 degrees, 9.7±0.

Abstract: The present invention intends to provide a TPD derivative being excellent in electric properties as a compound due to its extremely less content of impurities (TPD analogues) as well as being excellent in film-forming property due to its low crystallinity.

Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): 1

Abstract: A photoconductive imaging member containing a photogenerating layer, a charge transport layer, or a plurality of charge transport layers, and which charge transport, especially the top charge transport layer contains a vinyl containing organic compound.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a metallic component and an electron transport component.

Abstract: A photoconductive imaging member including an optional supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said layer includes a charge transport component and a polysiloxane.

Abstract: Charge transport layers comprise a charge transport compound and binder including styrene-acrylic resin. Dual layer photoconductors comprise a substrate, a charge transport layer as described, and a charge generation layer.

Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and a charge transport layer containing a binder and a compound containing at least two (methyl)acrylates.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.

Abstract: A photoconductive imaging member containing a hole blocking layer, a photogenerating layer, a charge transport layer, and thereover an overcoat layer comprised of a polymer With a low dielectric constant and charge transport molecules.

Abstract: A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, allyl glycidyl ether, hydroxy containing polymer.