Patent application number | Description | Published |
20090123176 | POLYVINYL ACETAL RESIN, ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - The present invention relates to a polyvinyl acetal resin having a specific repeating structural unit, an electrophotographic photosensitive member using the polyvinyl acetal resin, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member. | 05-14-2009 |
20090208247 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member is provided in which both a potential variation over a long time period and a potential variation within a short time period are suppressed. A method of producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are also provided. In the electrophotographic photosensitive member, an intermediate layer is a layer formed by coating and drying a coating liquid for an intermediate layer, containing an acidic titania sol and an organic resin, and the acidic titania sol is an acidic sol containing anatase-type titanium oxide crystal particles having an average primary particle diameter of 3 nm or more and 9 nm or less. | 08-20-2009 |
20110045390 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member having a support and a photosensitive layer formed on the support, wherein the photosensitive layer contains a boron complex which is a product of the reaction of a compound having a phenolic hydroxyl group and a carbonyl group with a boron halide. Also disclosed are a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member. | 02-24-2011 |
20110076614 | METHOD OF DRYING ORGANIC PIGMENT, METHOD OF PROCESSING PHTHALOCYANINE PIGMENT, AND METHOD OF MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - A method of drying an organic pigment is provided which includes an under-depressurization microwave drying step of irradiating the organic pigment with microwaves under depressurization and drying the organic pigment. A method of processing a phthalocyanine pigment and a method of manufacturing an electrophotographic photosensitive member are also provided each of which utilizes the drying method. | 03-31-2011 |
20110129768 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING THE SAME, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - According to aspects of the present invention, an electrophotographic photosensitive member includes a surface layer comprising a cured resin obtained by polymerizing a compound having at least one polymerizable functional group. Aspects of the present invention provide an electrophotographic photosensitive member whose surface layer comprises a compound (urea derivative) having a certain structure, a method for producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus including the electrophotographic photosensitive member. | 06-02-2011 |
20110293323 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member is provided in which both a long-term potential variation and a short-term potential variation are suppressed, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are also provided. The intermediate layer of the electrophotographic photosensitive member includes an organic resin and rutile-type titanium oxide crystal particles which contain tin and have an average primary particle diameter of 3 nm or more and 9 nm or less. | 12-01-2011 |
20110300474 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS, AND PROCESS FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - An electrophotographic photosensitive member having a surface layer containing a polymeric product obtained by polymerizing a specific adamantane compound, a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member, and a process for producing the electrophotographic photosensitive member. | 12-08-2011 |
20120003576 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - The charge generation layer of an electrophotographic photosensitive member is made to contain a specific amine compound in order to provide an electrophotographic photosensitive member that can output images that are practically free from an image flaw or have less image flaws attributable to a ghost phenomenon under low temperature and low humidity environment and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member. | 01-05-2012 |
20120033994 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member is provided in which both a long-term potential variation and a short-term potential variation are suppressed, a method for producing the electrophotographic photosensitive member, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are also provided. An intermediate layer of the electrophotographic photosensitive member is formed by applying a coating liquid for the intermediate layer, which contains an organic resin and a rutile-type acidic titania sol containing tin, and drying the applied coating liquid. | 02-09-2012 |
20120301177 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, AND UREA COMPOUND - An electrophotographic photosensitive member that includes the outermost surface layer formed by curing a mixture of a charge transporting substance having a chain-polymerizable functional group and a urea compound represented by the following formula (1) or (2), and a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member. | 11-29-2012 |
20120301178 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member having a surface layer that contains a polymer produced by the polymerization of a compound having a chain-polymerizable functional group. The compound having a chain-polymerizable functional group is a compound represented by the formula (1). | 11-29-2012 |
20120301179 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member has a surface layer that contains a urea compound having two or more urea moieties. Each of the urea moieties has a carbonyl group and two nitrogen atoms. Each of the two nitrogen atoms connects to an alkyl group and a substituted or unsubstituted aryl group or a substituted or unsubstituted arylene group. | 11-29-2012 |
20130137020 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member includes a support and a photosensitive layer. The electrophotographic photosensitive member includes a surface layer that contains a polymer produced by the polymerization of a compound having a chain-polymerizable functional group. The compound having a chain-polymerizable functional group is a compound represented by the following formula (1). | 05-30-2013 |
20130137021 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member has a surface layer that contains a polymer produced by the polymerization of a charge transporting substance having two or more methacryloyloxy groups per molecule. The surface layer contains a quinone derivative at a concentration of 5 ppm or more and 1500 ppm or less of the total mass of the polymer. The quinone derivative is a compound represented by the following formula (1) or a compound represented by the following formula (2) or both. | 05-30-2013 |
20130137023 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - In order to provide an electrophotographic photosensitive member with which a ghost is suppressed even under a low temperature and low humidity environment, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member, the electrophotographic photosensitive member has a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer and comprising a charge generating material and a hole transporting material, wherein the undercoat layer comprises a particular amine compound. | 05-30-2013 |
20130137024 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - In an electrophotographic photosensitive member having a surface layer containing a polymer obtainable by polymerization of a compound having a chain-polymerizable functional group, the compound having a chain-polymerizable functional group includes a compound represented by formula (1). | 05-30-2013 |
20130137025 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD OF PRODUCING PHTHALOCYANINE CRYSTAL, METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND PHTHALOCYANINE CRYSTAL - Provided is an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support, in which the photosensitive layer includes a phthalocyanine crystal containing a compound satisfying the following formulae (A) and (B) in itself: 8.9≦δP≦10.7 (A) and −3.2≦L≦−1.5 (B) (in the formula (A), δP represents a polar term of Hansen Solubility Parameters, and in the formula (B), L represents an energy level (eV) of an LUMO (lowest unoccupied molecular orbital) obtained as a result of structural optimization calculation based on density functional calculation B3LYP/6-31G). | 05-30-2013 |
20130137026 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member includes a support, a charge-generating layer disposed on the support, and a charge-transporting layer disposed on the charge-generating layer, in which the charge-generating layer contains a charge-generating substance and a compound represented by the formula (1). A process cartridge includes the electrophotographic photosensitive member described above. An electrophotographic apparatus includes the electrophotographic photosensitive member described above. | 05-30-2013 |
20130137032 | METHOD OF PRODUCING GALLIUM PHTHALOCYANINE CRYSTAL AND METHOD OF PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER USING THE METHOD OF PRODUCING GALLIUM PHTHALOCYANINE CRYSTAL - Provided is a method of producing an electrophotographic photosensitive member having improved sensitivity and capable of outputting an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The method of producing a gallium phthalocyanine crystal includes subjecting a gallium phthalocyanine and a specific amine compound, which are added to a solvent, to a milling treatment to perform crystal transformation of the gallium phthalocyanine. In addition, the gallium phthalocyanine crystal is used in the photosensitive layer of the electrophotographic photosensitive member. | 05-30-2013 |
20140065530 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - A photosensitive layer of an electrophotographic photosensitive member includes a phthalocyanine pigment and a specific dicyanoethylene compound. Alternatively, the photosensitive layer and/or an undercoat layer of the electrophotographic photosensitive member include a specific dicyanoethylene compound, and the photosensitive layer includes the phthalocyanine pigment. | 03-06-2014 |
20140065531 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - A charge-generating layer of an electrophotographic photosensitive member includes a phthalocyanine pigment and a specific tricyanoethylene compound. Alternatively, the charge-generating layer and/or an undercoat layer of the electrophotographic photosensitive member includes a specific tricyanoethylene compound, and the charge-generating layer includes the phthalocyanine pigment. | 03-06-2014 |
20140106269 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PRODUCTION METHOD FOR ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS, AND PARTICLE HAVING COMPOUND ADSORBED THERETO - Provided is an electrophotographic photosensitive member including a surface layer containing particles which include: silica particles; and a compound-A adsorbed to each of the silica particles, in which the silica particles have a volume average particle diameter of 0.1 μm or more and 4 μm or less, and a specific surface area of 400 m | 04-17-2014 |
20140141362 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member includes a support, an undercoat layer formed on the support, and a photosensitive layer which is formed on the undercoat layer and contains a charge generating substance and a hole transporting substance. The undercoat layer contains a specific amine compound, titanium oxide crystal particles having an average primary particle diameter of 3 nm or more and 15 nm or less and an organic resin. | 05-22-2014 |
20140141363 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support. A surface layer of the electrophotographic photosensitive member contains a polymerized product of a composition that contains a charge transporting compound having a particular group (chain polymerizable functional group). | 05-22-2014 |
20140141364 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - An electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support. A surface layer of the electrophotographic photosensitive member contains a polymerized product of a composition that contains a charge transporting compound having a particular group (polymerizable functional group). | 05-22-2014 |
20140170540 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - The photosensitive layer of an electrophotographic photosensitive member contains (a) a gallium phthalocyanine crystal, (b) a specific amine compound and (c) a specific polyvinylacetal resin. | 06-19-2014 |
20140170541 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - Provided is an electrophotographic photosensitive member including a charge-generating layer that includes: an amine compound represented by the formula (1) and a gallium phthalocyanine crystal, or a gallium phthalocyanine crystal containing the amine compound represented by the formula (1); and an arene compound, in which the arene compound includes at least one compound selected from the group consisting of a compound represented by the formula (2) and a compound represented by the formula (3). | 06-19-2014 |
20140170542 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS AND PHTHALOCYANINE CRYSTAL - The photosensitive layer of an electrophotographic photosensitive member contains a phthalocyanine crystal in which a compound represented by the following formula (1) is contained: | 06-19-2014 |
20140170543 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS AND PHTHALOCYANINE CRYSTAL - An electrophotographic photosensitive member includes a support and a charge generating layer and a charge transporting layer formed on the support. The charge generating layer contains a specific amine compound. | 06-19-2014 |
20140212801 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS - A photosensitive layer or a charge generation layer of an electrophotographic photosensitive member contains a gallium phthalocyanine and a particular diamine compound such as 1,2-diaminoethane or 1,3-diaminopropane. The content of the particular diamine compound in the photosensitive layer or the charge generation layer is from 10 ppm to 1,000 ppm (mass ratio) based on the gallium phthalocyanine. | 07-31-2014 |
20140212804 | SOLUTION OF GALLIUM PHTHALOCYANINE METHOD FOR PREPARING THE SAME METHOD FOR PRODUCING GALLIUM PHTHALOCYANINE CRYSTAL METHOD FOR PURIFYING COMPOSITION CONTAINING GALLIUM PHTHALOCYANINE AND METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER - A solution of a gallium phthalocyanine contains a compound of formula (1) and a gallium phthalocyanine of formula (2), | 07-31-2014 |
20140308606 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, ELECTROPHOTOGRAPHIC APPARATUS, AND GALLIUM PHTHALOCYANINE CRYSTAL - Provided is an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member that can output an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support, in which the photosensitive layer includes a gallium phthalocyanine crystal containing a specific amine compound in itself. | 10-16-2014 |
20140363759 | ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS - In order to provide an electrophotographic photosensitive member with which a ghost is suppressed even under a low temperature and low humidity environment, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member, the electrophotographic photosensitive member has a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer and comprising a charge generating material and a hole transporting material, wherein the undercoat layer comprises a particular amine compound. | 12-11-2014 |