Radiation Sensitive Composition Or Product Containing Specified Antioxidant Patents (Class 430/970)
  • Publication number: 20040180280
    Abstract: A photoreceptor including a photosensitive layer including a specific diamine compound, or a photoreceptor including an electroconductive substrate; a photosensitive layer located overlying the electroconductive substrate; and optionally a protective layer located overlying the photosensitive layer, wherein an outermost layer of the photoreceptor includes a filler, an organic compound having an acid value of from 10 to 700 mgKOH/g and a specific diamine compound. An image forming method, an image forming apparatus and a process cartridge using the photoreceptor are also provided. A method for manufacturing the photoreceptor including the steps of preparing a coating liquid including the filler, the organic compound, the specific diamine compound and an antioxidant; and coating the coating liquid is also provided.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 16, 2004
    Inventors: Takaaki Ikegami, Tomoyuki Shimada, Yasuo Suzuki
  • Patent number: 6780554
    Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: August 24, 2004
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai
  • Publication number: 20040126687
    Abstract: An electrophotographic photoconductor having at least a photosensitive layer on a conductive support, wherein the electrophotographic photoconductor comprising, in the outermost layer thereof: a filler, an organic compound having an acid value of 10-400 mgKOH/g, and at least one of compounds represented by the following general formulas 1 and 2: 1
    Type: Application
    Filed: September 23, 2003
    Publication date: July 1, 2004
    Inventors: Takaaki Ikegami, Tomoyuki Shimada, Yasuo Suzuki, Nozomu Tamoto, Hidetoshi Kami
  • Publication number: 20040126689
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate, a photosensitive layer located overlying the electroconductive substrate, and optionally a protective layer overlying the photosensitive layer, wherein an outermost layer of the photoreceptor includes a filler, a binder resin and an organic compound having an acid value of from 10 to 700 mgKOH/g. The photosensitive layer can be the outermost layer. A coating liquid for an outermost layer of a photoreceptor including a filler, a binder resin, an organic compound having an acid value of from 10 to 700 mgKOH/g and plural organic solvents. A method for preparing a photoreceptor including forming a photosensitive layer, and coating the coating liquid on the photosensitive layer. An image forming method and apparatus and a process cartridge using the photoreceptor are also provided.
    Type: Application
    Filed: July 23, 2003
    Publication date: July 1, 2004
    Inventors: Nozomu Tamoto, Tetsuro Suzuki, Hiroshi Tamura, Tatsuya Niimi, Akihiko Matsuyama, Eiji Kurimoto, Hidetoshi Kami
  • Publication number: 20040121252
    Abstract: A single layered electrophotographic photoreceptor includes a photosensitive layer having having at least a charge generating material, a charge transport material and a binder on a conductive support, wherein the charge generating material is amorphous titanylphthalocyanine, and the photosensitive layer is a hindered phenol compound and/or hindered amine compound.
    Type: Application
    Filed: October 15, 2003
    Publication date: June 24, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventors: Saburo Yokota, Hwan-Koo Lee, Beam-Jun Kim, Kyung-Yol Yon
  • Publication number: 20040115545
    Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Anthony M. Horgan, Satchidanand Mishra, Robert C.U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland
  • Publication number: 20040115546
    Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai, Dale S. Renfer, Markus R. Silvestri
  • Publication number: 20040115547
    Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol.
    Type: Application
    Filed: December 16, 2002
    Publication date: June 17, 2004
    Applicant: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Colleen A. Helbig, Kent J. Evans, John F. Yanus, Karen S. Garland, Paul J. DeFeo, Anita P. Lynch, Kathleen M. Carmichael, Damodar M. Pai
  • Patent number: 6720121
    Abstract: An electrophotographic photoconductor and method of manufacturing thereof exhibits excellent characteristics of residual potential and repetition potential by containment of an additive of a compound. The electrophotographic photoconductor includes a conductive substrate and a photosensitive layer on the substrate, in which the photosensitive layer contains tri(4-nitrophenyl) phosphate.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: April 13, 2004
    Assignee: Fuji Electric Imaging Device Co. Ltd.
    Inventors: Yoichi Nakamura, Koichi Aizawa, Teruo Sasaki, Kenichi Hara
  • Publication number: 20040063017
    Abstract: A single layered electrophotographic photoreceptor has a photoreceptor layer comprising polyester resin as a binder resin having biphenyl fluorene units in the main chain, and specific phenolic compounds as antioxidants. The electrophotographic photoreceptor according to the present invention enables obtaining a better image by suppressing a decrease in dark decay and charged electric potential due to repeated use and has an extended electrical lifetime.
    Type: Application
    Filed: July 14, 2003
    Publication date: April 1, 2004
    Applicant: SAMSUNG Electronics Co., Ltd
    Inventors: Hwan koo Lee, Saburu Yokota, Kyung-yol Yon, Beouj-jun Kim, Hae-ree Joo, Nam-Jeong Lee
  • Publication number: 20030235770
    Abstract: Charge transport layers comprise a charge transport compound and binder including styrene-acrylic resin. Dual layer photoconductors comprise a substrate, a charge transport layer as described, and a charge generation layer.
    Type: Application
    Filed: June 20, 2002
    Publication date: December 25, 2003
    Inventors: David Glenn Black, Ronald Harold Levin, Dat Quoc Nguyen, Bradford Lee Taylor, Vincent Wen-Hwa Ting, Franklin Dilworth Zartman
  • Publication number: 20030228534
    Abstract: This invention relates to an improved organophotoreceptor that includes an electrically conductive substrate having a surface and a photoconductive element on said surface of said electrically conductive substrate. The photoconductive element comprises a layer with a polymeric binder, an electron transport compound, and a light stabilizer. The layer can also comprise a charge generating compound and/or a charge transport compound.
    Type: Application
    Filed: April 28, 2003
    Publication date: December 11, 2003
    Inventor: Jiayi Zhu
  • Publication number: 20030215726
    Abstract: An electrophotographic photoreceptor includes an electroconductive substrate. A charge generation layer overlies the electroconductive substrate. A first charge transport layer overlying the charge generation layer includes a first charge transport material (D1) and a first binder resin (R1). A second charge transport layer overlying the first charge transport layer includes a filler, a second charge transport material (D2) and a second binder resin (R2). The first and second charge transport layers have a total thickness of from 5 to 25 &mgr;m. A weight ratio (D1/R1) of the first charge transport material (D1) to the first binder resin (R1) in the first charge transport layer is greater than a weight ratio (D2/R2) of the second charge transport material (D2) to the second binder resin (R2) in the second charge transport layer.
    Type: Application
    Filed: March 11, 2003
    Publication date: November 20, 2003
    Inventors: Akihiro Sugino, Ryohichi Kitajima, Yoshiaki Kawasaki, Takaaki Ikegami, Eiji Kurimoto
  • Publication number: 20030203298
    Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), 1
    Type: Application
    Filed: September 26, 2002
    Publication date: October 30, 2003
    Applicant: Hodogaya Chemical Co., Ltd.
    Inventors: Katsumi Abe, Chieko Inayoshi, Masaki Ohkubo, Mitsutoshi Anzai, Yasuo Murakami
  • Publication number: 20030194627
    Abstract: Electrophotographic photoreceptor having a photosensitive layer containing an amino compound selected from formulae 1 to 22 in the specification.
    Type: Application
    Filed: September 6, 2002
    Publication date: October 16, 2003
    Inventors: Takaaki Ikegami, Yasuo Suzuki, Tomoyuki Shimada, Nozomu Tamoto, Hidetoshi Kami
  • Publication number: 20030148201
    Abstract: Disclosed are a novel organic photoconductive material suitable as a charge-transporting material in a photosensitive layer of an electrophotographic photoreceptor or usable in various display devices, and an electrophotographic photoreceptor which uses the above organic photoconductive material in a photosensitive layer and which exhibits a high charge potential and high sensitivity and also exhibits little or almost no change in various properties in repeated use and can exhibit stabilized performances.
    Type: Application
    Filed: October 21, 2002
    Publication date: August 7, 2003
    Inventors: Tatsuya Kodera, Koichi Torizuka
  • Publication number: 20030134209
    Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor contains a resinous layer comprises a resin comprising an organic polymer component and a siloxane condensation product component, and flourine atom-containing particles.
    Type: Application
    Filed: July 10, 2002
    Publication date: July 17, 2003
    Inventor: Akihiko Itami
  • Publication number: 20030087171
    Abstract: The present invention relates to an organic photoreceptor unit that has a conductive base unit, a charge generating layer formed on the conductive base unit, a first charge transport layer that is formed on the charge generating layer and contains a first bonding resin and a first charge transport material, and a second charge transport layer that is formed on the first charge transport layer and contains a second bonding resin including denatured polycarbonate resin, fluorine resin particles and a second charge transport material, wherein the content of the second charge transport material relative to the second bonding resin is larger than the content of the first charge transport material relative to the first bonding resin.
    Type: Application
    Filed: August 23, 2002
    Publication date: May 8, 2003
    Applicant: Minolta Co., Ltd.
    Inventors: Shigeaki Tokutake, Keiichi Inagaki
  • Publication number: 20030073015
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate, a photosensitive layer located overlying the electroconductive substrate, and optionally a protective layer overlying the photosensitive layer, wherein an outermost layer of the photoreceptor includes a filler, a binder resin and an organic compound having an acid value of from 10 to 700 mgKOH/g. The photosensitive layer can be the outermost layer. A coating liquid for an outermost layer of a photoreceptor including a filler, a binder resin, an organic compound having an acid value of from 10 to 700 mgKOH/g and plural organic solvents. A method for preparing a photoreceptor including forming a. photosensitive layer, and coating the coating liquid on the photosensitive layer. An image forming method and apparatus and a process cartridge using the photoreceptor are also provided.
    Type: Application
    Filed: November 2, 2001
    Publication date: April 17, 2003
    Inventors: Nozomu Tamoto, Tetsuro Suzuki, Hiroshi Tamura, Tatsuya Niimi, Akihiko Matsuyama, Eiji Kurimoto, Hidetoshi Kami
  • Patent number: 6544702
    Abstract: Charge transport layers comprise a hydrazone charge transport compound, Savinyl® yellow and an antioxidant. Dual layer photoconductors comprise the charge transport layer in combination with a substrate and a charge generation layer.
    Type: Grant
    Filed: January 27, 1999
    Date of Patent: April 8, 2003
    Assignee: Lexmark International, Inc.
    Inventors: Gregory Walter Haggquist, Ronald Harold Levin, Scott Thomas Mosier
  • Patent number: 6489069
    Abstract: An electrophotographic image carrier is disclosed. The image carrier has a photoreceptor made from a photoreceptive layer and a resin layer. The resin layer is made of a siloxane resin having a cross-linked structure, and contains an anti-oxidant.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: December 3, 2002
    Assignee: Konica Corporation
    Inventors: Akihiko Itami, Takeo Oshiba, Tomoo Sakimura, Yohko Kitahara, Masahiko Kurachi, Kazuhisa Shida
  • Publication number: 20020122998
    Abstract: A photoconductor having a charge transport layer in illustrative embodiments of a polycarbonate binder, 30 to 60 percent by weight DEH hydrazone, 0.5 percent to 5 percent acetosol yellow, and 0.5 percent to 5 percent by weight of the butylated reaction product of p-cresol and dicyclopentadiene. The charge generation layer by type IV oxotitanium phthalocyanine in polyvinylbutyral, poly (methyl-phenyl) siloxane and polyhydroxystyrene. Light fatigue is largely eliminated while the physical and cost advantages of DEH are realized.
    Type: Application
    Filed: March 1, 2001
    Publication date: September 5, 2002
    Inventors: Mark Thomas Bellino, David Glenn Black, Gregory W. Haggquist, Ronald Harold Levin, Weimei Luo-Gheleta, Scott Thomas Mosier, Dat Quoc Nguyen, Bradford Lee Taylor, Franklin Dilworth Zartman
  • Patent number: 6432597
    Abstract: Azine derivatives or their combinations with hindered phenol antioxidant in the charge transport layer containing one or more triarylamines or a combination of one triarylamine and one hydrazone improve light fatigue of a photoreceptor, which results in stabilized print quality. The robust performance against light damage allows the shutter in a cartridge to be removed and the requirement for special protection procedure during inspection and handling to be simplified.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: August 13, 2002
    Assignee: Lexmark International, Inc.
    Inventors: Gregory Walter Haggquist, Ronald Harold Levin, Weimei Luo, Scott Thomas Mosier
  • Publication number: 20020076631
    Abstract: A photoreceptor for forming an electrostatic latent image is disclosed. The photoreceptor comprises a photosensitive layer and a resin layer wherein a resin of the resin layer comprises an organic polymer component, siloxane component and charge transportable component.
    Type: Application
    Filed: October 15, 2001
    Publication date: June 20, 2002
    Inventors: Akihiko Itami, Satoshi Uchino, Fumitaka Mochizuki, Kazuhisa Shida, Takeo Ohshiba
  • Patent number: 6399262
    Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a photosensitive layer provided on an electrically conductive support which has a sealed alumite film, a surface layer of said electrophotographic photoreceptor comprises a hardenable siloxane resin having charge transportability or a hardenable siloxane resin comprising a partial structure having charge transportability.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: June 4, 2002
    Assignee: Konica Corporation
    Inventors: Takeo Oshiba, Akihiko Itami, Tomoo Sakimura, Yohko Kitahara, Masahiko Kurachi, Kazuhisa Shida
  • Publication number: 20010053490
    Abstract: An electrophotographic photoconductor a substrate and a photosensitive layer on the substrate. The photosensitive layer contains charge generation substance, charge transport substance and a binder resin. The binder resin has a dispersion d1=Mz/Mw of at least 1.6, or a polydispersity d2=Mw/Mn of at least 2.0, each of d1 and d2 being an indicator of a range of molecular weight distribution converted to polystyrene standard, wherein Mz, Mw and Mn are a z-average molecular weight, a weight-average molecular weight, and a number-average molecular weight of the binder resin, respectively. The resulting electrophotographic photoconductor minimizes film abrasion and filming, allowing the photoconductor to possess stable characteristics in repeated use over long periods.
    Type: Application
    Filed: March 15, 2001
    Publication date: December 20, 2001
    Inventors: Yoshimasa Tomiuchi, Hiroaki Yokouchi
  • Publication number: 20010051307
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate; a charge generation layer overlying the substrate; a charge transport layer formed overlying the substrate and including a charge transport material, a polycarbonate resin, an antioxidant having the following formula (1): 1
    Type: Application
    Filed: April 4, 2001
    Publication date: December 13, 2001
    Applicant: Ricoh Company Limited
    Inventors: Hiroshi Ikuno, Narihito Kojima, Eiji Kurimoto
  • Patent number: 6322940
    Abstract: An object of the invention is to implement a photoreceptor having high sensitivity and faithfully realizing high-density recording. An electrophotographic photoreceptor used for an image forming apparatus for forming a latent image at a resolution of 1200 dpi or more by exposing an object to light and visualizing the latent image with a reversal development system using a toner having an average particle size of 6 &mgr;m or less, which comprises an electrically conductive support, and a photosensitive layer composed of a charge generating layer formed on the electrically conductive support, and a charge transport layer formed on the charge generating layer, having a thickness of 20 &mgr;m or less.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: November 27, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Satoshi Nishigaki, Hiroshi Sugimura
  • Publication number: 20010044060
    Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a resin layer comprising a siloxane resin formed by hardening a compound represented by Formula 1, 2 or 3, or a hydrolyzed product which has a structural unit having a charge transportation ability, and a ratio M1/M2 of the sum of the amount in moles M1 of the compound represented by Formula 1 and that represented by Formula 2 to the amount in moles of the compound represented by Formula 3 is within the range of from 0.01 to 1.
    Type: Application
    Filed: March 19, 2001
    Publication date: November 22, 2001
    Inventors: Kazuhisa Shida, Satoshi Uchino, Akihiko Itami
  • Publication number: 20010031410
    Abstract: An electrophotographic photoconductor has a conductive substrate and a photosensitive layer on the substrate.
    Type: Application
    Filed: February 27, 2001
    Publication date: October 18, 2001
    Inventors: Motohiro Takeshima, Osamu Nabeta
  • Publication number: 20010031412
    Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a difference in ionization potential between the photosensitive layer and the hardenable resinous layer of not more than 0.4 eV, and a response time T10 defined in the specification is not more than 0.25 second. An image forming method and apparatus employing the photoreceptor are also disclosed.
    Type: Application
    Filed: March 7, 2001
    Publication date: October 18, 2001
    Inventors: Akihiko Itami, Takeo Oshiba
  • Patent number: 6291120
    Abstract: An object of the invention is to obtain an electrophotographic photoreceptor having high sensitivity, high image quality, high stability and high resolution. A charge generating layer of the electrophotographic photoreceptor contains, as a charge generating substance, a crystalline titanyl phthalocyanine composition exhibiting, in an X-ray diffraction spectrum of a CuK&agr; characteristic X-ray (wavelength: 1.5418 Å), at least four diffraction peaks at Bragg angles (2&thgr;±0.2°) of 10.0° or lower, and a diffraction peak at a Bragg angle of 27.2° having an intensity smaller than the maximum diffraction intensity of the four diffraction peaks, or a lowly crystalline titanyl phthalocyanine composition exhibiting a diffraction peak having the maximum diffraction intensity at a Bragg angle (2&thgr;±0.2°) of 27.3°. A charge transporting layer of the electrophotographic photoreceptor contains, as a charge transporting substance, a bisamine compound.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: September 18, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Satoshi Nishigaki, Takatsugu Obata, Akihiro Kondo
  • Publication number: 20010016296
    Abstract: A photoreceptor including an electroconductive substrate and a photosensitive layer which is formed on the electroconductive substrate and which includes a charge generation material, wherein the charge generation material comprises an organic pigment and wherein the photosensitive layer further includes at least one ion selected from the group consisting of K+, Na+, NO3−, HCOO−, NO2−, Cl−, Br−, and NH4+ or one or more water-soluble inorganic salts.
    Type: Application
    Filed: December 13, 2000
    Publication date: August 23, 2001
    Applicant: Ricoh Company Limited
    Inventors: Takashi Rokutanzono, Tamotsu Aruga, Tatsuya Niimi, Yoshiaki Kawasaki
  • Publication number: 20010006755
    Abstract: A cylindrical electrophotoreceptor is disclosed. The layer thickness decreasing amount &Dgr;Hd (in &mgr;m) is 0≦&Dgr;Hd<5×10−6 per rotation and residual potential variation amount per cm2 is 0≦&Dgr;Vr<100 (in V) for 1 A of an electric current generated by charging and exposure.
    Type: Application
    Filed: December 13, 2000
    Publication date: July 5, 2001
    Inventors: Akihiko Itami, Hideo Yoshizawa, Masao Asano
  • Patent number: 6200714
    Abstract: An electrophotographic photoconductor includes a phosphinate additive in a photosensitive film that improves the stability of the coating liquid for the photosensitive film. The electrophotographic photoconductor includes an electrically conductive substrate and a photosensitive film on the substrate. The photosensitive film contains a charge generation agent and a phosphinate compound. The photoconductor may be of either a monolayer or a laminate construction. In the case of a laminate type photoconductor, the phosphinate compound is incorporated into the charge transport layer. A method of making an electrophotographic photoconductor adds a phosphinate additive to the coating liquid for a photosensitive film to improve stability of the coating liquid. The method involves producing a coating liquid containing a phosphinate compound and coating a conductive substrate with the coating liquid to form a photosensitive film.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: March 13, 2001
    Assignee: Fuji Electric Imaging Device Co., Ltd.
    Inventors: Yoichi Nakamura, Teruo Sasaki, Kenichi Hara, Hideki Kina, Akira Ootani
  • Patent number: 6168893
    Abstract: There is provided an electrophotographic photoconductor whose stability has been improved by incorporating an aryloxydiarylphosphine compound into a layer having a charge transport material. There is also provided a method for producing an electrophotographic photoconductor, which can improve the stability of a coating liquid for formation of a photosensitive layer by incorporating the aryloxydiarylphosphine compound into the coating liquid.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: January 2, 2001
    Assignee: Fuji Electric Imaging Device Co., Ltd.
    Inventors: Yoichi Nakamura, Shinjirou Suzuki, Hideki Kina, Akira Ootani