Abstract: The photoconductor includes a conductive support, a photosensitive layer, and a protective layer. The protective layer is a polymer of a radical-polymerizable composition containing a perfluoropolyether compound including a radical-polymerizable functional group, a radical-polymerizable monomer including a radical-polymerizable functional group, and an inorganic fine particle including a radical-polymerizable functional group. The radical-polymerizable functional group of the perfluoropolyether compound is different from the radical-polymerizable functional group of the radical-polymerizable monomer and identical to the radical-polymerizable functional group of the inorganic fine particle.

Abstract: An electrophotographic photoreceptor includes: a conductive support; a photosensitive layer disposed on the conductive support; and a protective layer disposed on the photosensitive layer, wherein the protective layer is formed of a polymerized and cured product of a radically polymerizable composition containing a radically polymerizable monomer, a perfluoropolyether compound having a radically polymerizable group, and metal oxide fine particles having a radically polymerizable group.

Abstract: Provided is an image bearing member for electrophotography, the image bearing member being excellent in abrasion resistance, scratch resistance, and toner releasability, and being capable of preventing the occurrence of image defects due to cleaning failure for a long period. The image bearing member for electrophotography according to the present invention includes a surface layer formed of a polymerization-cured product of a radical polymerizable composition. The radical polymerizable composition contains a radical polymerizable perfluoropolyether compound (radical polymerizable PFPE), and the ratio of the average number of fluorine atoms to the average number of radical polymerizable functional groups in the radical polymerizable PFPE is 2.0 to 20.0.

Abstract: An electrophotographic image support includes: a conductive support; a photosensitive layer disposed on the conductive support; and a protective layer disposed on the photosensitive layer, the protective layer being formed of a polymerized cured product of a radically polymerizable composition containing a radically polymerizable monomer and a perfluoropolyether compound having a radically polymerizable functional group, the perfluoropolyether compound having the radically polymerizable functional group being represented by the following formula (1): [Chemical Formula 1] (B)l-A-CF2O(CF2CF2O)m(CF2O)nCF2-A-(B)l??(1) wherein A represents a linking group having a molecular weight of 100 or more and 400 or less, B represents a radically polymerizable functional group, l represents an integer of 2 or more, and m and n each represent an integer of 0 or more, wherein m+n?1.

Abstract: An electrophotographic photoreceptor includes: a conductive support; a photosensitive layer disposed on the conductive support; and a protective layer disposed on the photosensitive layer, wherein the protective layer is formed of a polymerized and cured product of a radically polymerizable composition containing a radically polymerizable monomer, a perfluoropolyether compound having a radically polymerizable group, and metal oxide fine particles having a radically polymerizable group.

Abstract: An electrostatic image developing toner which is capable of obtaining highly chromatic full-color images of bright color without causing perceived color contamination and exhibits superior lightfastness is disclosed, wherein the toner comprises a binding resin and a colorant, and the colorant is tetraazaporphyrin or phthalocyanine compounds such as a compound represented by the following formula:

Abstract: An object of the present invention is to form a high density electrostatic latent image on an organic photoreceptor via image exposure using a semiconductor laser or a light-emitting diode of an oscillation wavelength of 350-500 nm; and to provide an organic photoreceptor exhibiting improved sensitivity and repetition characteristics or improved dot reproducibility deterioration, and an image forming apparatus employing the organic photoreceptor. In an organic photoreceptor having a charge generating layer and a charge transporting layer on a conductive support, an organic photoreceptor wherein a charge generating layer incorporates a binder resin and a Br substituted pyranthrone-based compound and the spectral spectrum of the charge generating layer has maximum absorption values each in the region of 430-445 nm, 500-510 nm, and 530-545 nm.

Abstract: An electrophotographic photoreceptor is disclosed, comprising on or over an electrically conductive support a photosensitive layer containing a charge generation material and a charge transfer material, wherein the charge generation material is comprised of two or more compounds represented by the following formula wherein X and Y are each an alkyl group or a halogen atom, n is an integer of 1 to 6 and m is an integer of 0 to 6, and wherein the compounds differ in at least one of m and n of the formula.

Abstract: Disclosed is a toner comprising a resin and a colorant, wherein the colorant comprises a compound represented by formula (I) and a compound represented by formula (II).

Abstract: An electrophotographic photoreceptor having a photosensitive layer on a conductive support, wherein the photosensitive layer comprises a pigment containing an adduct of titanyl phthalocyanine and 2,3-butanediol, and a ratio of an absorbance at a wavelength of 780 nm of the photosensitive layer (referred to as Abs780) divided by an absorbance at a wavelength of 700 nm of the photosensitive layer (referred to as Abs700) is 0.8 to 1.1, the ratio being referred to as Abs780/Abs700, and Abs780 and Abs700 each being calculated from a relative reflectance spectrum of the electrophotographic photoreceptor, wherein the relative reflectance spectrum is determined using an aluminum conductive support using a reflectance spectrum of the aluminum conductive support as a base line.

Abstract: An electrophotographic toner containing a resin and a colorant is disclosed. The colorant is represented by the formula in the formula, M1 is a silicon atom (Si), a germanium atom (Ge) and a tin atom (Sn); Z is independently a chlorine atom, a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, or an aryloxy group having 6 to 8 carbon atoms; and A1, A2, A3 and A4 are each independently an atomic group defined in the specification.

Abstract: Disclosed is an electrophotographic photoreceptor comprising on or over an electrically conductive support a photosensitive layer containing a pyranthrone compound represented by the following formula and the pyranthrone compound has a crystal structure exhibiting a CuK? X-ray diffraction spectrum having peaks at angles (2?±0.2°) of 12.3°, 20.5°, 25.3° and 28.3°.

Abstract: An organic photoreceptor having a photosensitive layer on a conductive support is disclosed, in which the photosensitive layer contains a pigment containing an adduct of titanyl phthalocyanine and at least either of (2R,3R)-2,3-butanediol and (2S,3S)-2,3-butanediol, the spectrum of the photosensitive layer has the absorption maximum value in the region of 750 to 780 nm, and the ratio of the absorbance at 780 nm (Abs 780) to the absorbance at 750 nm (Abs 750) (Abs 780/Abs 750, a value obtained by correcting the absorbance at 1000 nm as 0) is 0.6 to 1.0.

Abstract: A photoelectric conversion element is disclosed, comprising a compound represented by the following formula between a pair of opposed electrodes: wherein Ar1, AR2 and Ar3 are each a substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group, x is an organic residue having an acidic group and n is an integer of 2 to 8. A solar cell comprising the photoelectric conversion element is also disclosed.

Abstract: An object of the invention is to provide an image forming apparatus and process cartridge both employing the organic photoreceptor by improving an abrasion resistance of the organic photoreceptor up to the same level as an amorphous silicone photoreceptor, the image blur and image flow problem liable to generate in high temperature and high moisture condition, and to provide an organic photoreceptor capable of obtaining a precise and a high quality dot image by short wavelength laser exposure. Provided is an organic photoreceptor having a conductive substrate, provided thereon at least a photo receiving layer and a protective layer in this order, wherein the protective layer comprises at least a resin layer obtained by a reaction between a chain polymerizable compound having a charge transportable structure represented by Formula (1) and a chain polymerizable compound without having a charge transportable structure.

Abstract: An electrophotographic photoreceptor is disclosed, comprising on or over an electrically conductive support a photosensitive layer containing a charge generation material and a charge transfer material, wherein the charge generation material is comprised of two or more compounds represented by the following formula wherein X and Y are each an alkyl group or a halogen atom, n is an integer of 1 to 6 and m is an integer of 0 to 6, and wherein the compounds differ in at least one of m and n of the formula.

Abstract: A mixture of bisamine compounds comprising a bisamine compound represented by Formula (1) and a bisamine compound represented by Formula (2): A-X-A??Formula (1) A-X—B??Formula (2) wherein, A and B represent a different substituted amino group represented by Formula (3), X represents a bivalent linkage group: wherein, each of Ara and Arb independently represents an aryl group which may have a substituted group, and Arc represents an arylene group which may have a substituted group, and Ara, Arb and Arc may be combined to form a ring structure.

Abstract: An object of the present invention is to form a high density electrostatic latent image on an organic photoreceptor via image exposure using a semiconductor laser or a light-emitting diode of an oscillation wavelength of 350-500 nm; and to provide an organic photoreceptor exhibiting improved sensitivity and repetition characteristics or improved dot reproducibility deterioration, and an image forming apparatus employing the organic photoreceptor. In an organic photoreceptor having a charge generating layer and a charge transporting layer on a conductive support, an organic photoreceptor wherein a charge generating layer incorporates a binder resin and a Br substituted pyranthrone-based compound and the spectral spectrum of the charge generating layer has maximum absorption values each in the region of 430-445 nm, 500-510 nm, and 530-545 nm.

Abstract: Disclosed is an electrophotographic photoreceptor comprising on or over an electrically conductive support a photosensitive layer containing a pyranthrone compound represented by the following formula and the pyranthrone compound has a crystal structure exhibiting a CuK? X-ray diffraction spectrum having peaks at angles (2?±0.2°) of 16.9°, 18.7° and 20.6°.

Abstract: An electrophotographic toner containing a resin and a colorant is disclosed. The colorant is represented by the formula in the formula, M1 is a silicon atom (Si), a germanium atom (Ge) and a tin atom (Sn); Z is independently a chlorine atom, a hydroxy group, an alkoxy group having 1 to 8 carbon atoms, or an aryloxy group having 6 to 8 carbon atoms; and A1, A2, A3 and A4 are each independently an atomic group defined in the specification.