Abstract: The present invention provides an optical film including a copolymer that includes (a) an alkene monomer, (b) an acrylate monomer, and (c) at least one of an unsaturated organic acid monomer and an unsaturated acid anhydride monomer having one or more double bonds, a protective film for a polarizer film, and a polarizer plate and an image display device using the same.

Abstract: The present invention relates to an optical film comprising an aromatic based unit having chain having the hydroxy group containing portion and aromatic moiety; and a styrene-based unit comprising one or more styrene-based derivatives, and has absolute values of in-plane retardation (Rin) and thickness retardation (Rin) of 10 nm or less regardless of stretching, and a polarizing plate and an information technology apparatus including the same.

Abstract: The present invention relates to a transparent resin composition which comprises (a) a (meth)acrylate based unit comprising one or more (meth)acrylate based derivatives; (b) an aromatic based unit having a chain having the hydroxy group containing portion and an aromatic moiety and (c) a styrene-based unit comprising one or more styrene-based derivatives, and an optical film that is formed by using the same.

Abstract: A liquid toner composition and a preparation method utilize a colorant, an organosol, a charge control agent, a carrier liquid, a dispersion assistant agent, and a photoreactive catalyst, in which the dispersion assistant agent is a polymer including an unsaturated functional group to cause photopolymerization in a presence of the photoreactive catalyst, and the photoreactive catalyst produces a free radical through an irradiation of light, and initiates the photopolymerization of the dispersion assistant agent. According to embodiments of the present invention, the toner organosol rarely affects the physical properties required of the liquid toner, and an offset error in a fixing operation is removed, resulting in an improved quality of a printed image.

Abstract: A liquid toner for electrophotography and a method of preparing the liquid toner are disclosed. The liquid toner includes a carrier liquid, an organosol, a colorant, a charge controlling agent (CCA), and (meth)acrylic (co)polymer soluble in the carrier liquid. The liquid toner has a low solidification rate and good redispersion when left for a long period of time, especially at a high temperature for a long period of time, while maintaining the existing physical properties of a liquid toner, such as image density, at certain levels.

Abstract: A composition for an overcoat layer suitable for use in an organophotoreceptor for liquid toner, an organophotoreceptor manufactured by employing the composition and an electrophotographic imaging apparatus containing the organophotoreceptor. Since the organophotoreceptor can maintain higher charge potential and low residual or discharge potential, the lifetime of the organophotoreceptor can be extended. Also, since the organophotoreceptor has good solvent resistance and abrasion resistance, it can be advantageously used for liquid toner.

Abstract: A liquid ink composition includes a colorant, a charge control agent, an organosol, a carrier liquid, and a storage stabilizer. The storage stabilizer is a metal salt of a metal cation and an organic anion having 15 to 30 carbon atoms. The liquid ink composition is produced by a method of adding the storage stabilizer in an effective amount to improve the dispersibility and storage stability at high temperatures without deteriorating the electrical property and the optical density of the liquid ink composition. The storage stabilizer can be a metal salt of C15 to C30 alkyl carboxylate or a metal salt of a C15 to C30 alkyl sulfonate.

Abstract: A positively-charged electrophotographic organic photoreceptor includes an electrically conductive support, and a charge transport layer and a charge generating layer sequentially stacked on the electrically conductive support. The charge generating layer is formed by coating a charge generating layer forming composition that includes a fluorene compound, a charge generating material, a binder resin and an organic solvent on the charge transport layer, and drying. The organic photoreceptor has high sensitivity, while suppressing contamination of a charge generating layer during coating, and thicknesses of a charge transport layer and a charge generating layer may be adjusted. Also, the electrostatic properties of the organic photoreceptor, including charge potential and exposure potential, may be easily adjusted.

Abstract: A composition for an overcoat layer suitable for use in an organophotoreceptor for liquid toner, an organophotoreceptor manufactured by employing the composition and an electrophotographic imaging apparatus containing the organophotoreceptor. Since the organophotoreceptor can maintain higher charge potential and low residual or discharge potential, the lifetime of the organophotoreceptor can be extended. Also, since the organophotoreceptor has good solvent resistance and abrasion resistance, it can be advantageously used for liquid toner.

Abstract: A composition for an overcoat layer suitable for use in an organophotoreceptor for liquid toner, an organophotoreceptor manufactured by employing the composition and an electrophotographic imaging apparatus containing the organophotoreceptor. Since the organophotoreceptor can maintain higher charge potential and low residual or discharge potential, the lifetime of the organophotoreceptor can be extended. Also, since the organophotoreceptor has good solvent resistance and abrasion resistance, it can be advantageously used for liquid toner.

Abstract: A double-layered positively-charged organic photoreceptor t does not suffer from contamination caused by charge transport compounds that dissolve out during coating of a charge generating layer, and in which the charge generating layer and a charge transport layer have suitable interfacial properties for effective charge transfer. The composition that forms a charge transport layer on an electroconductive support contains a first charge transport compound that is soluble in an acetate solvent, a second charge transport compound that is insoluble in an acetate solvent, a binder resin, and an organic solvent. The method of manufacturing the photoreceptor includes: coating a surface of an electroconductive support with the charge transport layer forming composition and drying the surface to form a charge transport layer; and coating a surface of the charge transport layer with a charge generating layer forming composition and drying the surface to form a charge generating layer.

Abstract: A composition forms an overcoat layer for an organic photoreceptor by combining an organic silane compound, an acrylic polymer, polyvinyl butyral and a solvent. The organic photoreceptor has increased electrical and mechanical properties, leading to improved life characteristics. Also, unlike when a single material of either acrylic polymer or silsesquioxane is used in forming an overcoat layer, when the composition of the present invention is used, it is not necessary to coat a primer or an adhesive layer, thereby simplifying a coating process and reducing the cost required in forming additive layers.

Abstract: A multi-layered electrophotographic positively charged organic photoconductor includes a conductive substrate, a charge transport layer formed on the conductive substrate, and a charge generating layer formed on the charge transport layer. A composition to form the charge transport layer includes at least one hole transport material, a binder resin and an organic solvent, and a composition to form the charge generating layer includes a charge generating material, a binder resin, an organic solvent and a hole transport material. An organic photoconductor has improved static electrical properties by controlling interfacial conditions of the charge transport layer and the charge generating layer. The charge generating layer may be readily coated on the charge transport layer. In addition, the organic photoconductor has excellent electric properties such as an improved sensitivity and a low discharge voltage.

Abstract: A composition for an overcoat layer suitable for use in an organophotoreceptor for liquid toner, an organophotoreceptor manufactured by employing the composition and an electrophotographic imaging apparatus containing the organophotoreceptor. Since the organophotoreceptor can maintain higher charge potential and low residual or discharge potential, the lifetime of the organophotoreceptor can be extended. Also, since the organophotoreceptor has good solvent resistance and abrasion resistance, it can be advantageously used for liquid toner.

Abstract: A single layered electrophotographic photoreceptor includes a photosensitive layer having at least a charge generating material, a hole transporting material, an electron transporting material, and a binder on a conductive support. The photosensitive layer includes a peculiar charge transfer complex (CT-complex) formed by the hole transporting material and the electron transporting material.

Abstract: A composition for a charge generating layer of a positively-charged electrophotographic organophotoreceptor and a method of manufacturing same. The charge generating layer composition for the positively-charged electrophotographic organophotoreceptor, which has a charge transport layer and a charge generating layer sequentially coated on a conductive support, includes a charge generating material, a binder, and an organic solvent containing an alcoholic solvent and an acetate solvent in a ratio from 1:9 to 5:5 by weight.

Abstract: A liquid toner composition and a preparation method utilize a colorant, an organosol, a charge control agent, a carrier liquid, a dispersion assistant agent, and a photoreactive catalyst, in which the dispersion assistant agent is a polymer including an unsaturated functional group to cause photopolymerization in a presence of the photoreactive catalyst, and the photoreactive catalyst produces a free radical through an irradiation of light, and initiates the photopolymerization of the dispersion assistant agent. According to embodiments of the present invention, the toner organosol rarely affects the physical properties required of the liquid toner, and an offset error in a fixing operation is removed, resulting in an improved quality of a printed image.

Abstract: A double-layered positively-charged organic photoreceptor has a charge transport layer with effective adhesion to an electroconductive support and effective resistance against dissolving when in contact with a hydrocarbon-based solvent of a wet developer. Therefore, the double-layered positively-charged organic photoreceptor requires neither anodizing on the electroconductive support nor an additional adhesive layer, and is compatible with wet developing methods. The double-layered positively-charged organic photoreceptor includes: an electroconductive support; a charge transport layer formed on a surface of the electroconductive support and including a charge transport material for transporting holes, a polycarbonate-based first binder resin, and a second binder resin of a polyester copolymer with a biphenylfluorene group; and a charge generating layer formed on the surface of the charge transport layer.

Abstract: A composition forms an overcoat layer of an organophotoreceptor, the composition including polyaminoether and a solvent, and an organophotoreceptor employing the overcoat layer formed from the composition. The polyaminoether is represented by Formula 1: wherein n is an integer from 10 to 400.

Abstract: A liquid toner for electrophotography and a method of preparing the liquid toner are disclosed. The liquid toner includes a carrier liquid, an organosol, a colorant, a charge controlling agent (CCA), and (meth)acrylic (co)polymer soluble in the carrier liquid. The liquid toner has a low solidification rate and good redispersion when left for a long period of time, especially at a high temperature for a long period of time, while maintaining the existing physical properties of a liquid toner, such as image density, at certain levels.