摘要:
An electrophotographic photoconductor include an conductive substrate; an undercoat layer provided on the conductive substrate; and a photosensitive layer having charge-generation and charge-transport functions provided on the undercoat layer. The undercoat layer includes a polyamide resin and methylhydrogenpolysiloxane-treated titanium dioxide and preferably styrene-maleic acid half-ester copolymer. The photoconductor can be produced by the steps of: dispersing a polyamide resin and methylhydrogenpolysiloxane-treated titanium dioxide and preferably styrene-maleic acid half-ester copolymer in a mixture solvent of an alcohol-type solvent and a halogenated hydrocarbon-type solvent, thereby preparing a coating liquid for an undercoat layer; applying the coating liquid onto a conductive substrate, thereby providing an undercoat layer on the substrate; and forming a photosensitive layer on the undercoat layer.
摘要:
An organic photosensitive member for electrophotography is provided which comprises a photosensitive layer 3 formed on an electroconductive substrate 1 via an undercoating layer 2, the photosensitive layer 3 comprising a charge generating layer 4 and a charge transporting layer 5, wherein the undercoating layer 2 consists essentially of 12/6/66 copolymeric polyamide expressed by the general formula (I) ##STR1## and a styrene/maleic acid half ester copolymer. By providing such an undercoating layer, it becomes possible to obtain a photosensitive member having excellent electrophotographic characteristics, involving minimal changes in these characteristics during repeated use, and giving a high quality image stably.
摘要:
In an electrophotographic photoconductor wherein an intermediate layer and a photosensitive layer are successively formed on a conductive substrate, a conductive boron polymer is used for forming the intermediate layer.
摘要:
An electrophotographic photoconductor includes an electroconductive substrate and a photosensitive layer which is provided on the electroconductive substrate and which includes a charge generating agent, a hole charge transporting agent, and antioxidant composed of at least two antioxidant materials. In a second embodiment, the electrophotographic photoconductor includes an electroconductive substrate and a photosensitive layer which is provided on the electroconductive substrate and which includes a charge generating layer containing a charge generating agent and a charge transporting layer containing a hole charge transporting agent, and antioxidant composed of at least two antioxidant materials.
摘要:
An intermediate layer having fine hydrophobic silica particles is positioned between a substrate and a photosensitive layer. The fine hydrophobic silica particles preferably have a primary particle-averaged particle size of not more than 50 nm and desirably the surface of the fine hydrophobic silica particles is alkyl-silylated or treated with silicone.
摘要:
A photosensitive member for electrophotography has a photosensitive layer provided on a photoconductive substrate. The photosensitive layer contains at least one of indole derivatives represented by a chemical formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are members selected from a group consisting of hydrogen atom and alkyl, aralkyl, allyl and alkoxy groups having 1-9 carbon atoms (but R.sub.1 and R.sub.2 do not stand for hydrogen atoms at the same time); R.sub.3 is a member selected from a group consisting of hydrogen and halogen atoms and alkyl and alkoxy groups having 1-3 carbon atoms; X is a member selected from a group consisting of alkylen, allylen, carbonyl, sulfonyl, sulfinyl and sulfide groups and oxygen atom; and n stands for an integer of 0 or 1.
摘要:
An electrophotographic photoreceptor has a conductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer contains one compound which is selected from the group of the compounds represented by the formulae (I), (II), (III), (IV), and (V). Therefore, the electrophotographic photoreceptor shows stable characteristics, good durability, and long span of life in repeat use.
摘要:
A photoconductor for electrophotography includes an electroconductive substrate; and a photosensitive layer provided on the electroconductive substrate and composed of an intermediate layer, a charge generation layer, and a charge transfer layer laminated in this order, wherein the intermediate layer is a doped layer and is composed of a cured layer of a copolycondensate between an amino resin and a phenolic resin hat has been subjected to doping with at least one dopant.
摘要:
The photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer may be a monolayer or function-separated laminate type one which comprise a charge generating layer and a charge transporting layer laminated one on another. The charge generating layer contains a specified benzidine compound represented by general formula (I) below as the charge transporting substance. ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are the same or different, each represent independently an aryl group, an alkylaryl group, an alkoxyaryl group or a halogenated aryl group provided that R.sub.1 and R.sub.2, or R.sub.3 and R.sub.4, or both combine and form a condensed aromatic group with the nitrogen atom to which they are bonded, respectively; R.sub.5 and R.sub.6 each represent independently a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom.
摘要:
An inverted-lamination organic positive-photoconductor for electrophotography comprises a conductive substrate, a charge transport layer on the conductive substrate, a charge generation layer on the charge transport layer, a surface protection layer on the charge generation layer, with the surface protection layer containing a polyaniline compound which includes being doped with a protonic acid selected from a sulfonic acid, a carboxylic acid, an organophosphoric acid, or a potential compound, wherein the potential compound is a compound that reacts to form one of a sulfonic acid, a carboxylic acid, or an organophosphoric acid.