Abstract: A member including for example, a substrate, a charge generating layer, a charge transport layer comprising a poly(phenylsilsesquioxane), molecule, and a film forming binder.

Abstract: An electrophotographic photoconductor comprising at least an electroconductive support and a photoconductive layer which is formed on said electroconductive support, the outermost layer of the photoconductor contains particles comprising a polyorganosiloxane-containing phase which contains polyorganosiloxane and an organic polymer-containing phase which contains organic polymer without silicon and has a polyorganosiloxane content which is less than the polyorganosiloxane-containing phase, each phase being exposed at the top surface of the photoconductor.

Abstract: An electrophotographic photoreceptor that can sufficiently prevent occurrence of filming, whereby defects on an image can be sufficiently prevented, and an electrophotographic process cartridge and an electrophotographic apparatus using the electrophotographic photoreceptor are to be provided. The electrophotographic photoreceptor contains an electroconductive substrate having provided thereon a photosensitive layer, and an outermost layer of the photosensitive layer has a dynamic hardness of about from 13.0×109 to 100.0×109 N/m2. According to the invention, occurrence of flaws on the surface of the photoreceptor can be sufficiently prevented, and cracking of a member made in contact with the photoreceptor can also be sufficiently prevented. Therefore, occurrence of filming is sufficiently prevented, and occurrence of defects on an image is also sufficiently prevented.

Abstract: The present invention relates to a photosensitive member for electrophotography which comprises a electroconductive support and one or more layers that include a photosensitive layer formed on the surface of the electroconductive support, wherein the outermost layer comprises binder resin, fluororesin particles A and fluororesin particles B.

Abstract: Provided are a photoreceptor of an electophotographic system satisfactorily high in resistance to contamination with a developer or corona products and durability to a contact electrification unit or a cleaning blade and capable of preventing occurrence of film defects in the production, and a process cartridge and an image forming apparatus in which a good image quality can be obtained over a long period of time. The photoreceptor includes a conductive substrate and a silicon compound-containing layer located on the substrate and containing a cyclic siloxane compound and/or derivatives thereof. The cyclic siloxane compound has a cyclic structure containing a repeating unit represented by formula (1) wherein A1 and A2, which may be the same or different, each represent a monovalent organic group.

Abstract: The present invention aims to provide a photoconductor having improved wear resistance, and which has reduced foreign matter attached on the photoconductor surface. The electrophotographic photoconductor of the present invention is formed by sequentially disposing a photoconductive layer comprising at least one layer and a protective layer on an electroconductive support, and the protective layer comprises an acrylic resin and/or a methacrylic resin and a resin composition comprising an acryl-modified polyorganosiloxane compound which is dispersed in or compatible with the acrylic resin and/or the methacrylic resin.

Abstract: The invention provides an image forming apparatus comprising at least: an electrophotographic photoreceptor comprising at least a conductive substrate and a photosensitive layer provided on the conductive substrate; a charging device; an exposure device; a developing device; and a transfer device, wherein the exposure device is of a multi beam exposure system which has a surface emitting laser array having two or more light-emitting elements as an exposure light source and which scan the electrophotographic photoreceptor with plural light beams thereby forming electrostatic latent image, and wherein the outermost layer in the electrophotographic photoreceptor, positioned most distant from the conductive substrate, contains a silicon-containing resin containing at least a charge transporting compound or a characteristic group derived from a charge transporting compound, and having a structure in which bonds formed by crosslinking of an O atom with neighboring Si atoms are formed three dimensionally.

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: Electrophotographic photoreceptor having a photosensitive layer containing an amino compound selected from formulae 1 to 22 in the specification.

Abstract: An image formation method includes the steps of charging the surface of an electrophotographic photoconductor, exposing the charged photoconductor to a light image to form a latent electrostatic image on the photoconductor, developing the latent electrostatic image using a two-component developer containing a toner and a carrier to obtain a toner image, and transferring the toner image to an image receiving material directly or via an intermediate transfer member, with the photoconductor showing a surface friction coefficient of 0.40 or less, and the toner having toner particles with an average circularity of 0.930 or more.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor contains a resinous layer comprises a resin comprising an organic polymer component and a siloxane condensation product component, and fluorine atom-containing particles.

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 compounds are described that have a multiple number of hydrazone-bridged (N,N-disubstituted)arylamine groups connected by a central bridging group.

Abstract: The present invention provides an electrophotographic photosensitive member capable of maintaining high transfer efficiency without causing large transfer current for a long-term use, obtaining an excellent image, and achieving those effects especially when being applied to a color electrophotographic apparatus. The invention also provides a process cartridge and an electrophotographic apparatus each having such a photosensitive member. The present invention includes an electrophotographic photosensitive member having a photosensitive layer on a support, a surface layer containing diorganopolysiloxane having specific repeating structure units &agr; and &bgr;, and having a weight-average molecular weight of 1,000 to 1,000,000; in which a content of the diorganopolysiloxane in the surface layer is 0.01 to 20% by weight based on the entire weight of the surface layer (except in the case where the surface layer contains fluorine atom-containing resin particles).

Abstract: Disclosed are polymers which include tertiary aryl amine moieties that can function as hole transport agents and which also have reactive silane groups thereon capable of being condensed to a silsesquioxane composition, as well as the silsesquioxane compositions prepared therefrom. The silsesquioxanes can be coated onto substrates to form abrasion-resistant layers having hole transport properties useful in devices that require charge transport properties, such as light-emitting diodes and organic electrophotographic elements such as photoreceptors or photoconductors. Also disclosed are electrophotographic elements which comprise an electrically conducting layer, a charge generating layer overlying the electrically conducting layer, and a charge transport layer overlying the electrically conducting layer. The charge transport layer, which can be an overcoat overlying the charge generating layer, comprises the condensed reaction product of the disclosed polymers.

Abstract: An electrophotographic photoreceptor comprising a conductive support and a photosensitive layer disposed on the conductive support, wherein the photosensitive layer comprises a silicon compound-containing layer containing a silicon compound, and the silicon compound-containing layer further contains a resin, and wherein the photosensitive layer has a peak area in the region of −40 to 0 ppm (S1) and a peak area in the region of −100 to −50 ppm (S2) in a 29Si-NMR spectrum satisfying the following equation (1):

Abstract: An image forming method, a process cartridge, and an image forming apparatus are provided, with which an electrophotographic image that has superior image quality, superior fixing ability and remains good even in a hot and humid environment is obtainable. The image forming method includes: developing, with a developing agent, an electrostatic latent image formed on a surface of a photoreceptor to form a toner image; transferring the toner image onto an image receiving member to form a transfer image; and fixing the transferred image onto the image receiving member to form an image, wherein the photoreceptor includes a layer that contains a siloxane compound having charge-transferability and a crosslinking structure, with a compound having acid-adsorbing ability being supplied to the surface of the photoreceptor. The process cartridge and the image forming apparatus are used in the image forming method.

Abstract: An image forming apparatus comprising: an electrophotographic photoreceptor having an electrically-conductive support and a photosensitive layer provided on said support; an electrostatic charging unit for electrostatically charging said electrophotographic photoreceptor; an exposing unit for exposing said electrostatically charged electrophotographic photoreceptor to light to form an electrostatic latent image; a developing unit for developing said electrostatic latent image with a toner to form a toner image; a transferring unit for transferring said toner image onto a transferring medium; and a cleaning device for removing a toner left on said electrophotographic photoreceptor after the transfer of said toner image, wherein said image forming apparatus is capable of performing image formation at a processing speed of not lower than 150 mm/s, wherein said electrophotographic photoreceptor comprises a surface layer containing a siloxane-based resin having charge-transporting properties and a crosslinked stru

Abstract: An electrophotographic photoconductor having a layer of a crosslinked resin obtained by reacting an epoxy group-containing amine compound having a charge transferability-imparting group with at least one silicon compound selected from an epoxy ring-free alkoxysilane compound, an epoxy ring-free silanol compound, an epoxy ring-containing alkoxysilane compound and an epoxy ring-containing silanol compound.

Abstract: The present invention aims to provide a photoconductor having improved wear resistance, and which has reduced foreign matter attached on the photoconductor surface.

Abstract: A member including for example, a substrate, a charge generating layer, a charge transport layer comprising a poly(phenylsilsesquioxane), molecule, and a film forming binder.

Abstract: Provided are a photoreceptor of an electophotographic system satisfactorily high in resistance to contamination with a developer or corona products and durability to a contact electrification unit or a cleaning blade and capable of preventing occurrence of film defects in the production, and a process cartridge and an image forming apparatus in which a good image quality can be obtained over a long period of time. The photoreceptor includes a conductive substrate and a silicon compound-containing layer located on the substrate and containing a cyclic siloxane compound and/or derivatives thereof.

Abstract: Electrophotographic photoreceptor having a photosensitive layer containing an amino compound selected from formulae 1 to 22 in the specification.

Abstract: An image forming method, a process cartridge, and an image forming apparatus are provided, with which an electrophotographic image that has superior image quality, superior fixing ability and remains good even in a hot and humid environment is obtainable. The image forming method includes: 0developing, with a developing agent, an electrostatic latent image formed on a surface of a photoreceptor to form a toner, image; transferring the toner image onto an image receiving member to form a transfer image; and fixing the transferred image onto the image receiving member to form an image, wherein the photoreceptor includes a layer that contains a siloxane compound having charge-transferability and a crosslinking structure, with a compound having acid-adsorbing ability being supplied to the surface of the photoreceptor. The process cartridge and the image forming apparatus are used in the image forming method.

Abstract: An electrophotographic photoreceptor with excellent wear resistance and high durability, and an image formation method having a high toner transferring efficiency and capable of providing images with high quality. The image formation method features a developing step of forming a toner image by developing an electrostatic latent image formed on the surface of a latent image carrier by a developer containing at least a toner, a transferring step of forming a transferred image by transferring the toner image formed on the surface of the latent image carrier to the surface of an object recording medium, and a fixing step of fixing the toner image transferred on the surface of the object recording medium. The latent image carrier has a surface layer containing a cross-linked resin having charge transporting property, and the toner is a toner containing at least a binder resin of mainly a crystalline resin and a coloring agent.

Abstract: An apparatus for forming an image is provided that can sufficiently prevent occurrence of nibbled images without any damage of the photoreceptor and the intermediate transfer body, whereby good image quality can be stably obtained for a long period of time. In an apparatus for forming an image having an intermediate transfer body, the surface of the photoreceptor has a dynamic hardness of 8×109 N/m2 or more, and the surface of the intermediate transfer body has a dynamic hardness larger than that of the surface of the photoreceptor, and a difference between the dynamic hardness of the surface of the photoreceptor and the dynamic hardness of the surface of the intermediate transfer material is 2×1010 N/m2 or less.

Abstract: An electrostatic image forming apparatus is disclosed. The image forming apparatus contains a toner used in the developing means having saturated moisture content at a temperature of 30° C. and a relative humidity of 80% of within the range of from 0.1 to 2.0% by weight, and the photoreceptor contains a siloxane resin having an electric charge transfer ability and a crosslinked structure in the surface layer.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor contains a resinous layer comprises a resin comprising an organic polymer component and a siloxane condensation product component, and flourine atom-containing particles.

Abstract: An apparatus for forming an image that can stably provide an image for a long period of time is provided by using an electrophotographic photoreceptor having, as the outermost layer, a hard film containing one or more of a charge transporting organic silicon compound.

Abstract: An organophotoreceptor that includes:

Abstract: A photoreceptor for forming an electrostatic latent image is disclosed. The photoreceptor comprises a photosensitive layer and a resin layer wherein a resin of the resin layer comprises an organic polymer component, siloxane component and charge transportable component.

Abstract: The present invention relates to an organic photoreceptor unit that has a conductive base unit, a charge generating layer formed on the conductive base unit, a first charge transport layer that is formed on the charge generating layer and contains a first bonding resin and a first charge transport material, and a second charge transport layer that is formed on the first charge transport layer and contains a second bonding resin including denatured polycarbonate resin, fluorine resin particles and a second charge transport material, wherein the content of the second charge transport material relative to the second bonding resin is larger than the content of the first charge transport material relative to the first bonding resin.

Abstract: An electrophotographic photoconductor comprising at least an electroconductive support and a photoconductive layer which is formed on said electroconductive support, the outermost layer of the photoconductor contains particles comprising a polyorganosiloxane-containing phase which contains polyorganosiloxane and an organic polymer-containing phase which contains organic polymer without silicon and has a polyorganosiloxane content which is less than the polyorganosiloxane-containing phase, each phase being exposed at the top surface of the photoconductor.

Abstract: An electrophotographic photoreceptor that can sufficiently prevent occurrence of filming, whereby defects on an image can be sufficiently prevented, and an electrophotographic process cartridge and an electrophotographic apparatus using the electrophotographic photoreceptor are to be provided. The electrophotographic photoreceptor contains an electroconductive substrate having provided thereon a photosensitive layer, and an outermost layer of the photosensitive layer has a dynamic hardness of about from 13.0×109 to 100.0×109 N/m2. According to the invention, occurrence of flaws on the surface of the photoreceptor can be sufficiently prevented, and cracking of a member made in contact with the photoreceptor can also be sufficiently prevented. Therefore, occurrence of filming is sufficiently prevented, and occurrence of defects on an image is also sufficiently prevented.

Abstract: A function separated laminated electrophotography photosensitive body is equipped with at least a charge generating layer and a charge transport layer on top of a conductive substrate. A contact angle &thgr; of pure water on the charge transport layer satisfies the equation &thgr;>=94°. The resulting organic electrophotography photosensitive body prevents contamination of the photosensitive body surface resulting from component migration from the developing roller and achieves a stable image quality.

Abstract: An image forming method is disclosed. The method comprises processes in which a latent image on an electrophotographic photoreceptor is developed employing a developer material, and after transferring the visualized toner image to a recording material, the remaining toner on said photoreceptor is removed employing an elastic body cleaning blade. The electrophotographic photoreceptor comprises a surface layer containing a charge transportable polysiloxane hardenable resin, and said developer material comprises a fatty acid metal salt.

Abstract: An electrophotographic element comprises: an electrically conducting layer, a charge generating layer overlying the electrically conducting layer, and a charge transport layer overlying the electrically conducting layer. The charge transport layer, which can be an overcoat overlying the charge generating layer, comprises the reaction product in an aqueous medium of a mixture comprising a silsesquioxane polymer and a hole transport compound that comprises a tertiary arylamine containing at least one alcoholic or one phenolic hydroxy substituent.

Abstract: A photoconductive imaging member containing an optional supporting substrate, a photogenerating layer, a charge transport layer, and an overcoating layer comprised of a crosslinked composite polysiloxane-silica generated from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) in the presence of silica particles and water wherein A, B, D, and F represent the segments of the polymer backbone; E is a hole transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d each represent mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to about 1; R is alkyl, substituted alkyl, aryl, or substituted aryl, and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halide, cyano, and amino, subject to the provision that two of R1, R2, and R3 are each independently selected from th

Abstract: An electrophotographic image carrier is disclosed. The image carrier has a photoreceptor made from a photoreceptive layer and a resin layer. The resin layer is made of a siloxane resin having a cross-linked structure, and contains an anti-oxidant.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a resin layer comprising a siloxane resin formed by hardening a compound represented by Formula 1, 2 or 3, or a hydrolyzed product which has a structural unit having a charge transportation ability, and a ratio M1/M2 of the sum of the amount in moles M1 of the compound represented by Formula 1 and that represented by Formula 2 to the amount in moles of the compound represented by Formula 3 is within the range of from 0.01 to 1.

Abstract: To provide an electrophotographic image forming method, an electro-photographic image forming apparatus, and a processing cartridge and an electrophotographic photoreceptor to be used therein, by which an electrophotographic image with a high image quality can be stably obtained in a condition of high temperature and high humidity. In an electrophotographic image forming method including cleaning a toner remained on a photoreceptor by a brush roller and an elastic rubber blade after transferring a toner image formed on the photoreceptor to an image receiving material, wherein the photoreceptor has a resin layer comprising a siloxane resin having an electric charge transportable structural unit and a cross-linked structure, the thickness of the single filament and the density of the filament of the brush roller are each from 3 denier to 30 denier and from 4.5×102 to 15.

Abstract: A substituted tetraphenylporphyrin silicon complex is represented by the general formula (I): wherein R1, R2, R3, R4, and R5 independently denote a hydrogen atom, an alkyl group, an alkoxy group, or a polyalkyleneoxy group, providing that the case in which R1-R5 invariably denote a hydrogen atom is excluded, and X and Y independently denote a hydroxyl group, an alkoxy group of C1-C3, or a halogen atom is disclosed. This invention embraces a substituted tetraphenylporphyrin silicon complex, polysiloxane, polysilane, liquid crystal material, photoconducting element, and photo-functional chaarge transfer material.

Abstract: An image forming method is disclosed. The method comprises processes in which a latent image on an electrophotographic photoreceptor is developed employing a developer material, and after transferring the visualized toner image to a recording material, the remaining toner on said photoreceptor is removed employing an elastic body cleaning blade. The electrophotographic photoreceptor comprises a surface layer containing a large transportable polysiloxane hardenable resin, and said developer material comprises a fatty acid metal salt.

Abstract: A photoreceptor for forming an electrostatic latent image is disclosed. The photoreceptor comprises a photosensitive layer and a resin layer wherein a resin of the resin layer comprises an organic polymer component, siloxane component and charge transportable component.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a resin layer &bgr; obtained by hardening at least one of an organic silicon compound having a hydroxyl group or a hydrolizable group and condensation compound thereof, and a compound represented by formula(1), A(Q)k  (1) wherein A represents a group containing an aromatic group or a heterocyclic group, Q represents a group containing at least one of a hydroxy group, an amino group, and a mercapto group, and k represents an integer not less than 2, and wherein said organic silicon compound is three-dimensionally cross-linked.

Abstract: The present invention provides an electrophotographic photosensative member surface layer containing diorganopolysiloxane having, as substitutes, a perfluoro group, and a group having a substituted or unsubstituted polystyrene chain, a closed terminal and a degree of polymerization of 3 or more. The present invention also provides a process cartridge having the electrophotographic photosensative member, and a electrophotographic apparatus.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a photosensitive layer provided on an electrically conductive support which has a sealed alumite film, a surface layer of said electrophotographic photoreceptor comprises a hardenable siloxane resin having charge transportability or a hardenable siloxane resin comprising a partial structure having charge transportability.

Abstract: The present invention provides an electrophotographic photosensitive member having a surface layer containing diorganopolysiloxane having, as substituents, a perfluoro group, and a group having a substituted or unsubstituted polystyrene chain, a closed terminal and a degree of polymerization of 3 or more. The present invention also provides a process cartridge having the electrophotographic photosensitive member, and an electrophotographic apparatus.

Abstract: An image formation method includes the steps of charging the surface of an electrophotographic photoconductor, exposing the charged photoconductor to a light image to form a latent electrostatic image on the photoconductor, developing the latent electrostatic image using a two-component developer containing a toner and a carrier to obtain a toner image, and transferring the toner image to an image receiving material directly or via an intermediate transfer member, with the photoconductor showing a surface friction coefficient of 0.40 or less, and the toner having toner particles with an average circularity of 0.930 or more.

Abstract: A process for producing an electrophotographic photoreceptor, which includes contacting a solution containing at least one of optically functional organosilicon compounds represented by formula (I) F—[D—A]b  (I) with a solid catalyst for reaction, then separating the solid catalyst to form an optically functional coating solution, and coating and curing the optically functional coating solution to form a cured film, an electrophotographic photoreceptor having at least one layer made of the cured film produced by this process, and an image-forming apparatus having the same.