Abstract: An electrophotographic photoreceptor having an organic photosensitive layer at the surface layer is provided which can improve the wear resistance, durability and operation stability of the surface layer and can form images with no injury and unevenness in the density for a long period of time. The electrophotographic photoreceptor includes a conductive substrate, an undercoat layer, and a photosensitive layer having a charge generating layer and a charge transporting layer. In the photoreceptor, the photosensitive layer has a creep value CI? of 2.70% or more and an elastic ratio ?HU of 47% or more in a case where an indentation maximum load of 5 mN is loaded on the surface under a circumstance at a temperature of 25° C. and at a relatively humidity of 50%.

Abstract: A toner for electrophotography containing a resin binder and a colorant, wherein the resin binder contains a polyester in an amount higher than 50% by weight of the resin binder, wherein the polyester is obtained by polycondensing an alcohol component containing 60% by mol or more of an aliphatic diol having 3 to 10 carbon atoms and a carboxylic acid component comprising 80% by mol or more of an aromatic dicarboxylic acid compound, the polyester having an index of crystallinity of from 0.6 to 1.5, and a glass transition temperature of 0° C. or more and less than 40° C. The toner for electrophotography of the present invention can be used for, for example, developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, or the like.

Abstract: Layered double hydroxide salts as charge control agents in electrophotographic toners and developers, in powder coating materials, electret materials and in electrostatic separation processes of chargeable materials, such as polymers, wherein the double hydroxide salt contains monovalent and/or divalent, and also trivalent, metal cations, and also contains one or more organic anions A of the formula (I) X—R—Y??(1) wherein X is hydroxyl, carboxyl, sulfato or sulfo; Y is carboxyl, sulfato or sulfo, and R is an aliphatic, cycloaliphatic, heterocycloaliphatic, olefinic, cycloolefinic. heterocycloolefinic, aromatic, heteroaromatic, araliphatic or heteroaraliphatic radical having a total of at least 8 carbon atoms which can be substituted by one or several substituents from the group hydroxyl, amino, halogen, C1-C22-alkyl, C1-C22-alkoxy, —C1-C22-alkylene-(CO)—O—(CH2CH2O)0-50-alkyl,—C1-C22-alkylene-(CO)—O—(CH2H2O)0-50-haloalkyl, carboxy, sulfo, nitro or cyano.

Abstract: A toner is provided containing a parent particulate material, which contains; a first colorant, a second colorant, and a binder resin, wherein the first colorant contains an organic pigment having a primary particle diameter distribution with a median diameter of from 0.08 to 0.12 ?m, and the second colorant contains an organic pigment having a primary particle diameter distribution with a median diameter of from 0.01 to 0.

Abstract: A metal complex dye is disclosed, containing a dye as a ligand represented by the following formula (1). A color toner and a color filter containing the metal complex dye are also disclosed.

Abstract: An imaging member including an optional supporting substrate, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and an overcoating layer in contact with and contiguous to the charge transport, and which overcoating is comprised of an acrylated polyol, a polyalkylene glycol, a crosslinking agent, a hydroxy functionalized siloxane and a charge transport component.

Abstract: An electrophotographic imaging member includes a substrate, an optional intermediate (undercoat) layer, a photogenerating layer, which can be a single layer of include separate charge generating and charge transport layers, and an optional overcoating layer, wherein the photogenerating layer or a sub-layer thereof include a carbon nanotube material.

Abstract: The present invention relates to a process for preparing a toner for electrophotography comprising a crystalline polyester and a colorant, wherein the colorant is added in at least one of the neutralizing step, the emulsifying step, and the aggregating step and a process for preparing a toner for electrophotography comprising a crystalline polyester and a colorant, wherein the colorant is added in at least one of the neutralizing and emulsifying step, and the aggregating step. The toner obtained according to the process of the present invention can be suitably used, for example, in development of a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method, or the like.

Abstract: An imaging member with a unique overcoat composition adapted for forming protective, scratch-resistant overcoats is disclosed. The overcoat composition comprises a binder component that includes particular proportions of a acrylated polyol and propylene glycol. The overcoat composition also comprises a transport agent and a crosslinking agent.

Abstract: A layered double hydroxide salt as a charge control agent in electrophotographic toners and developers, in powder coating materials, electret materials and in electrostatic separation processes of chargeable materials, such as polymers, wherein the double hydroxide salt contains monovalent and/or divalent, and also trivalent, metal cations, and also contains organic anions A of the formulae (I) to (XXX) set forth in the specification.

Abstract: A polyester resin for toner, wherein an acid component of the polyester comprises (1) disproportionated rosin and (2) terephthalic acid and/or isophthalic acid, an alcohol component of the polyester comprises (3) glycidyl ester of tertiary fatty acid and (4) an aliphatic diol containing from 2 to 10 carbon atoms, and a cross-linking component of the polyester comprises a polycarboxylic acid having three or more carboxyl groups and/or a polyol having three or more hydroxyl groups, with the molar ratio of the acid component (1) to the acid component (2), (1)/(2), being from 0.2 to 0.6 and the molar ratio of the alcohol component (3) to the alcohol component (4), (3)/(4), being from 0.05 to 0.4. A toner for developing an electrostatic charge image contains the polyester resin for a toner (binder resin), a colorant and a charge control agent. Further, the invention also relates to an image-forming method using the toner for developing an electrostatic charge image.

Abstract: The present invention relates to a toner for electrostatic image development, obtainable by a process including the steps of: (I) melt-kneading a raw material mixture containing a resin binder, a releasing agent, and a colorant, cooling the melt-kneaded mixture, and pulverizing the cooled mixture; and (II) further pulverizing a pulverized product obtained in the step (I) in the presence of an external additive containing a negatively chargeable inorganic oxide subjected to hydrophobic treatment and a positively chargeable inorganic oxide subjected to hydrophobic treatment, and classifying the pulverized product; and a process for preparing the toner.

Abstract: A photoconductive imaging including at least a substrate, a charge generating layer, a charge transport layer, and an overcoat layer. The overcoat layer includes a crosslinked product of at least a phenolic resin and a phenol compound.

Abstract: An electrophotographic photoconductor that is excellent in the stability of image quality and can realize high durability is provided. In an electrophotographic photoconductor in which an underlying layer, a photoconductive layer, and a crosslinked-type charge transportation layer are stacked on an electrically conductive support in order, the underlying layer is composed of at least two layers being a layer containing an inorganic pigment and a layer including no inorganic pigment, and the crosslinked-type charge transportation layer is formed by curing, at least, a three-or-more-functional radical-polymerizable monomer having no charge transporting structure and a radical-polymerizable compound having one-functional charge transporting structure.

Abstract: An image forming process using an electrostatic latent image carrier containing a support and a photoconductive layer including: a charge generating layer, a charge transportable layer, and a cross-linked charge transportable layer which are disposed on the support in this order and the cross-linked charge transportable layer comprises a compound produced by the reaction between a trifunctional or more functional radical-polymerizable compound having no charge transportable structure, and a monofunctional radical-polymerizable compound having a charge transportable structure, and a toner produced in the form of particles by producing an adhesive base material through reacting a compound having an active hydrogen group with a polymer which can be reacted with the above-noted compound having an active hydrogen group in an aqueous medium.

Abstract: An image forming method comprising: developing a latent image formed on a cylindrical electrophotographic photoreceptor having a cylindricity of 5 to 40 ?m, with a developer comprising toner in which a ratio Dv50/Dp50 of a 50% volume particle diameter Dv50 to a 50% number particle diameter Dp50 is 1.0 to 1.15, a ratio Dv75/Dp75 of a cumulative 75% volume particle diameter from the largest volume particle diameter Dv75, to a cumulative 75% number particle diameter from the largest number particle diameter Dp75, is 1.0 to 1.20, and the number of toner particles having a particle diameter of 0.7×Dp50 or less is 10 percent by number or less, to form a toner image; and transferring the toner image from the photoreceptor to an intermediate transferring member, is disclosed.

Abstract: Binders containing metal oxide nanoparticles and a co-resin of phenolic resin and aminoplast resin, and electrophotographic imaging member undercoat layer containing the binders.

Abstract: An object of the invention is to provide a highly reliable electrophotographic photoreceptor having high sensitivity, excellent in light responsivity, not suffering from lowering of such characteristics even when it is used under a low temperature circumstance or in a high speed electrophotographic process, and with less fatigue degradation upon repetitive use. In a photosensitive layer of an electrophotoreceptor, an enamine compound represented by the following general formula (1), for example, the following structural formula is contained as a charge transporting substance, and further at least one of an antioxidant and a light stabilizer is contained. Accordingly, an electrophotographic photoreceptor excellent in sensitivity and light responsivity in various environments, and with less fatigue degradation upon repetitive use is realized.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula: where n is an integer between 1 and 10, inclusive; R1 comprises a functional group selected from the group consisting of a reactive ring group, an ethylenically unsaturated group, a reactive polar group, a hydrazone group, and an azine group; R2, R3, R4, R5, and R6 comprise, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, a heterocyclic group, or a part of a ring group; X is a bond or a linking group; and Q is O, S, or NR where R is H, an alkyl group, an acyl group, an alkenyl group, an alkynyl group, a heterocyclic group, or an aromatic group; and (b) a charge generating compound.

Abstract: A printing method comprising: forming a first image utilizing a liquid toner comprising carrier liquid and pigmented polymer particles having a first color; transferring the first image to an intermediate transfer member, forming at least one additional image utilizing a liquid toner comprising at least one carrier liquid and pigmented polymer particles having a second color, different from the first color, transferring the at least one additional image to the intermediate transfer member overlaid on the first image, to form a composite image on the intermediate transfer member; and further transferring the composite image to a further substrate, wherein said polymer particles in said first liquid toner and in at least one of said additional liquid toners have different compositions, aside from colorants, the differences in composition including at least one of different polymers or blends of polymers, different amounts or types of plasticizers, different amounts of solvated liquid and different compositions