Abstract: An electrophotographic photoconductor comprising a charge generation layer containing a charge generation material and a charge transfer layer containing a charge transfer material laminating in this order on a conductive support with an undercoat layer interposed between the charge generation layer and the conductive support, or comprising a monolayer type photosensitive layer containing a charge generation material and a charge transport material being formed on a conductive support with an undercoat layer interposed between the monolayer type photosensitive layer and the conductive support, wherein the charge transport layer or the monolayer type photosensitive layer contains, as a charge transfer material, a bisamine compound represented by the following general formula (I):

Abstract: An electrophotographic photoreceptor comprising a layered-type photosensitive layer in which a charge generating layer containing a charge generating material and a charge transporting layer containing a charge transporting material are stacked, formed on a conductive supporting member made of a conductive material, wherein the electrophotographic photoreceptor has high sensitive characteristics to a semiconductor laser beam having a wavelength ranging from 380 to 500 nm; the charge transporting layer of the layered-type photosensitive layer contains as the charge transporting material, a triarylamine dimer compound represented by the general formula (1): wherein Ar1 and Ar2 may be the same or different, and represent an unsubstituted or substituted arylene group or heterocyclic derivative bivalent group, Ar3 and Ar4 may be the same or different, and represent an unsubstituted or substituted aryl group or heterocyclic group, R1 and R2 may be the same or different, and represent an alkyl group, m and n rep

Abstract: There provides an electrophotographic photoreceptor using a novel amine compound which has an excellent effect of ozone resistance and can be used for providing an electrophotographic photoreceptor having no adverse effect on other characteristics, and an image forming apparatus including the photoreceptor. The aim is attained by an electrophotographic photoreceptor formed by stacking a single layer type photosensitive layer containing a charge generating material and a charge transporting material, or a layered photosensitive layer, in which a charge generation layer containing a charge generating material and a charge transporting layer containing a charge transporting material are stacked in this order, on a conductive substrate made of a conductive material, wherein the single layer type photosensitive layer or the charge transporting layer of the layered photosensitive layer contains a specific amine compound.

Abstract: An electrophotographic photoconductor comprising a charge generation layer containing a charge generation material and a charge transfer layer containing a charge transfer material laminating in this order on a conductive support with an undercoat layer interposed between the charge generation layer and the conductive support, or comprising a monolayer type photosensitive layer containing a charge generation material and a charge transport material being formed on a conductive support with an undercoat layer interposed between the monolayer type photosensitive layer and the conductive support, wherein the charge transport layer or the monolayer type photosensitive layer contains, as a charge transfer material, a bisamine compound represented by the following general formula (I):

Abstract: An electrophotographic photoconductor, comprising: a conductive support; and a photosensitive layer provided on the conductive support and containing a charge generation material and a charge transport material, the photosensitive layer containing, as the charge transport material, a compound represented by the following general formula (I): wherein Ar1 represents an optionally substituted arylene or bivalent heterocyclic group; Ar2s, which may be the same or different, each represent a hydrogen atom or an optionally substituted alkyl, aralkyl, aryl or monovalent heterocyclic group; R1 represents an optionally substituted alkyl group; R2s each represent a hydrogen atom or an optionally substituted alkyl group; R3 and R4s, which may be the same or different, each represent a hydrogen atom or an optionally substituted alkyl or alkoxy group; and n is 0 or 1.

Abstract: The present invention provides an electrophotographic photoconductor comprising an electroconductive substrate and a photosensitive layer provided on the electroconductive substrate, wherein the photosensitive layer comprises a charge-generating material and a charge-transporting material, the charge-transporting material comprising a compound represented by the general formula (1): wherein Ar1 and Ar2 each independently represent an optionally-substituted arylene or bivalent heterocyclic group; Ar3 and Ar4 each independently represent a hydrogen atom, or an optionally-substituted aryl or monovalent heterocyclic group, but are not simultaneously hydrogen atoms; or Ar3 and Ar4 may be taken together to form an optionally-substituted bivalent cyclic hydrocarbon or heterocyclic group; and n is 0 or 1.

Abstract: In an electrophotographic photoreceptor including a conductive substrate and a single layer type photosensitive layer, the aromatic polycarbonate is contained to a single layer type photosensitive layer, which aromatic polycarbonate includes a constituent unit represented by the following general formula (1) derived from a compound having a basic asymmetric bishydroxy enamine skeleton represented by the general formula: Accordingly, the electrophotographic photoreceptor is obtained which is excellent in charge transportability, mechanical strength, electric property, durability, etc. and can form good images for a long time.

Abstract: An electrophotographic photoreceptor comprising laminating a monolayer type photosensitive layer containing a charge generation material and a charge transport material or a laminate type photosensitive layer obtained by laminating a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order, on a conductive support, wherein the charge transport layer of the monolayer type photosensitive layer or laminate type photosensitive layer contains an enamine compound represented by the following formula (1).

Abstract: An electrophotographic photoreceptor of high durability capable of providing stable excellent electrical characteristics over a prolonged period of time, which electrophotographic photoreceptor excels in mechanical strength. A photosensitive layer (14) of an electrophotographic photoreceptor (1) includes a polyarylate resin having structural units, for example, those of formula (1) and an enamine compound represented by, for example, formula (2) The variables R1, R2, R3, R4, R7˜R10, X1, Ar1, Ar2, Ar3, Ar4, Ar5, R11, R12, R13, R14, a, m, and n are as defined in the specification. By virtue of these, the electrophotographic photoreceptor (1) of excellent mechanical strength and favorable electrical characteristics can be realized.

Abstract: A hydrazone compound capable of realizing an electrophotographic photoreceptor having good electric properties such as good sensitivity and light responsibility, good electric and mechanical durability and good environment stability, is provided. The hydrazone compound is represented by the following general formula (1). The compound is contained in the charge transporting layer of the electrophotographic photoreceptor.

Abstract: A method for producing a high-quality and low-cost laminate type electrophotographic photoreceptor having a coating film of uniform thickness with high efficiency is provided. In the electrophotographic photoreceptor having a laminated structure composed at least of two layers: a charge generating layer containing a charge generating substance and a charge transporting layer containing a charge transporting substance, the charge generating layer is formed by applying a coating solution for forming the charge generating layer onto the conductive support by an ink-jet coating method, and the charge transporting layer is formed by applying a coating solution for forming the charge transporting layer onto the charge generating layer by a roll coating method.

Abstract: An organic photoconductive material which is useful as a raw material compound for a variety of functional materials and makes it possible to implement an electrophotoconductor which is excellent in terms of the charge transporting performance, excellent in terms of dissolution in solvents and compatibility with resins, and excellent in terms of both the electrical properties and durability is provided. An example is an asymmetric bishydroxy compound which can be represented by the following structural formula (1aa). This compound is contained in a charge transforming layer 4 or a surface protective layer 5 of an electrophotoconductor 18. As a result, an electrophotoconductor 18 which is excellent in terms of the electrical properties and durability and can stably form high quality images without image defects such as black dots can be implemented.

Abstract: An object of the invention is to provide an electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance and capable of compatibilize the decrease of the size and the increase in the image forming speed of an electrophotographic apparatus. In a photosensitive layer of an electrophotographic photoreceptor, oxotitanium phthalocyanine having a crystal form showing a diffraction peak at a Bragg angle 2? (error: 2?±0.2°) of 27.2° in an X-ray diffraction spectrum is contained as a charge generating substance, and an enamine compound represented by the general formula for example, the structural formula (1-1) is contained as a charge transporting substance. Accordingly, the electrophotographic photoreceptor showing high responsivity even under a low temperature and low humidity circumstance is realized.

Abstract: The present invention provides an image forming apparatus provided with the highly sensitive electrophotographic photoreceptor comprising an enamine compound as a charge transport substance having a specific enamine structure; and provided with the semiconductor laser oscillating the laser beam with the oscillation wavelengths of from 390 nm to 500 nm inclusive in order to form an image having a high resolution for a long period of time.

Abstract: A electrophotographic photoreceptor comprising a monolayered photosensitive layer containing a charge generation material and a charge transport material or a multilayered photosensitive layer obtained by laying a charge generation layer containing a charge generation material and a charge transport layer containing a charge transport material in this order or in reverse order, on a conductive support, wherein the monolayered photosensitive layer or the charge transport layer of the multilayered photosensitive layer contains, as the charge transport material, an enamine compound represented by the formula (I): wherein Ar1 and Ar2, which may be the same or different, respectively represent an aryl group which may have a substituent or a monovalent heterocyclic residue which may have a substituent; R1 and R2, which may be the same or different, respectively represent a hydrogen atom, a halogen atom, an alkyl group which may have a substituent or an alkoxy group which may have a substituent; and R3 represe

Abstract: There is provided an organic photoconductive material that can realize an electrophotographic photoreceptor which is not only excellent in charge transporting ability but also excellent in solubility in a solvent and compatibility with a resin and moreover, which is excellent in both electric properties and durability, and the organic photoconductive material that is useful also as a raw material compound for various types of functional materials. An asymmetric bis-hydroxyenamine compound represented by the following structural formula (1aa) is provided. The compound is allowed to be contained in a charge transporting layer or a surface protective layer of an electrophotographic photoreceptor. This leads realization of the electrophotographic photoreceptor which is excellent in electric properties and durability and can stably form an image of high quality being free of an image defect such as a black spot.

Abstract: A charge transporting substance having three stilbene structures or butadiene structures in a molecule, represented by the following general formula is used as an organic photoconductive material. An electrophotographic photoconductor is prepared by causing a photosensitive layer which is disposed on a conductive support, to contain the organic photoconductive material in order to dispose the photoconductor to an image forming apparatus.

Abstract: An electrophotographic photoreceptor having excellent electric characteristics such as sensitivity characteristic and light responsiveness with an excellent life duration of abrasion resistance so that no flaw and density unevenness are generated on to-be-formed images for a long period of time, is provided. In an electrophotographic photoreceptor (1), an enamine compound represented by the following general formula (1), for example, an enamine compound represented by the following structural formula (1-1) is contained in a charge transporting layer (6), and a creep value (CIT) in a case where a maximum indentation load of 30 mN is put on a surface for 5 seconds under circumstances of temperature of 25° C. and relative humidity of 50%, is set to 2.70% or more and 5.00% or less, and a plastic deformation hardness value (Hplast) of the surface is set to 220 N/mm2 or more and 275 N/mm2 or less.

Abstract: An amine compound represented by the general formula (1), which is incorporated as a charge-transporting substance to a charge-transporting layer of an electrophotographic photoreceptor: (in which Ar1, Ar2 and Ar3 each represents an optionally-substituted aryl group, or an optionally-substituted monovalent heterocyclic ring residue. Ar4 represents an optionally-substituted arylene group, or an optionally-substituted bivalent heterocyclic ring residue. R1 represents an optionally-substituted alkyl group, an optionally-substituted aryl group, an optionally-substituted monovalent heterocyclic ring residue, or an optionally-substituted aralkyl group. R2 and R3 each represents a hydrogen atom, an optionally-substituted alkyl group, an optionally-substituted aryl group, an optionally-substituted monovalent heterocyclic ring residue, or an optionally-substituted aralkyl group. n represents an integer of 1 or 2.

Abstract: A method of forming an electrophotographic photoreceptor capable of forming a smooth coating film free of pinholes, bubbles, surface unevenness, etc. in a short time as a coating film for forming a photosensitive layer is provided. The method includes heating and drying a coating film formed by coating a coating solution containing ingredients of the photosensitive layer and a solvent medium containing 30% by weight or more of a solvent having a relative evaporation rate of less than 1.7 represented by the following formula (1) in an air stream at a temperature of 50° C. or higher and 130° C. or lower supplied from a blowing nozzle, by a far infrared ray heating method and an induction heating method, by using, for example, a drying apparatus, thereby manufacturing the electrophotographic photoreceptor: (relative evaporation rate)=(time for evaporating n-butyl acetate)/(time for evaporating solvent)??(1).