Polycyclo Ring System Having The Hetero Ring As One Of The Cyclo Systems Patents (Class 430/78)
-
Patent number: 5300385Abstract: Certain chemical compounds, which are aromatic heterocyclic-substituted derivatives of 4H-thiopyran-1,1,-dioxide given by the formula (I) wherein Het is a substituted or unsubstituted heterocyclic ring system containing at least one 5-membered heterocyclic aromatic ring; and R is an alkyl, aralkyl, or cycloalkyl group of 1 to about 10 carbon atoms, or an aryl group of 6 to about 12 carbon atoms, or a substituted or unsubstituted heterocyclic ring system containing at least one 5-membered aromatic heterocyclic ring, are electron-transport agents. These compounds exhibit good speed and toe voltage properties in electrophotographic elements.Type: GrantFiled: November 16, 1992Date of Patent: April 5, 1994Assignee: Eastman Kodak CompanyInventors: Michael R. Detty, John A. Sinicropi, J. Robin Cowdery, Ralph H. Young
-
Patent number: 5298353Abstract: An electrophotographic photosensitive member has a conductive support and a photosensitive layer provided on the conductive support. The photosensitive layer contains an oxytitanium phthalocyanine having intense peaks at 9.0.degree., 14.2.degree., 23.9.degree. and 27.1.degree. in the Bragg angle (2.theta..+-.0.2.degree.) of CuK.alpha. characteristics X-ray diffraction or an oxytitanium phthalocyanine having intense peaks at 7.4.degree., 9.2.degree., 10.4.degree., 11.6.degree., 13.0.degree., 14.3.degree., 15.0.degree., 15.5.degree., 23.4.degree., 24.1.degree., 26.2.degree. and 27.2.degree. in the Bragg angle (2.theta..+-.0.2.degree.) of CuK.alpha. characteristics X-ray diffraction, and further contains a non-metallic phthalocyanine.Type: GrantFiled: March 11, 1993Date of Patent: March 29, 1994Assignee: Canon Kabushiki KaishaInventor: Hiroyuki Ohmori
-
Patent number: 5298617Abstract: Oxytitanium phthalocyanine hydrate crystal and an electrophotographic photoreceptor using said crystal are disclosed. The structural formula of the crystal is TiOPc(H.sub.2 O).sub.n wherein Pc represents a phthalocyanine residual group, and n represents from 0.15 to 1; and the elemental analysis values of C, H and N are as follows: C: 65.0 to 66.3%; H: 2.5 to 3.1%; and N: 18.5 to 19.3%.Type: GrantFiled: September 10, 1991Date of Patent: March 29, 1994Assignee: Fuji Xerox Co., Ltd.Inventors: Katsumi Nukada, Katsumi Daimon, Masakazu Iijima, Yasuo Sakaguchi, Hidemi Nukada, Akihiko Tokida
-
Patent number: 5294512Abstract: The photoreceptor comprises a light-sensitive layer on a conductive support or a conductive layer. The light-sensitive layer containes a pyrene compounds.Type: GrantFiled: February 22, 1993Date of Patent: March 15, 1994Assignee: Konica CorporationInventors: Tomoko Suzuki, Akira Kinoshita
-
Patent number: 5294510Abstract: A photosensitive member is disclosed, which comprises a photosensitive layer containing a fluorescent bleaching agent comprising a coumarin compound represented by the formula (I): ##STR1##Type: GrantFiled: June 13, 1991Date of Patent: March 15, 1994Assignee: Minolta Camera Kabushiki KaishaInventors: Hideaki Ueda, Shigeaki Tokutake, Kimiyuki Ito, Yuki Shimada
-
Patent number: 5292608Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.Type: GrantFiled: June 11, 1993Date of Patent: March 8, 1994Assignee: Fugi Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
-
Patent number: 5292602Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.Type: GrantFiled: June 11, 1993Date of Patent: March 8, 1994Assignee: Fugi Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
-
Patent number: 5292604Abstract: A phthalocyanine crystal of mixed pigments of oxytitanium phthalocyanine and a halogenated gallium phthalocyanine or a halogenated indium phthalocyanine is disclosed. The phthalocyanine crystal of mixed pigments is used as a charge generating material which provides an electrophotographic photoreceptor excellent in sensitivity, stability on repeated use, and environmental stability.Type: GrantFiled: June 16, 1992Date of Patent: March 8, 1994Assignee: Fuji Xerox Co., Ltd.Inventors: Katsumi Nukada, Akira Imai, Katsumi Daimon, Masakazu Iijima
-
Patent number: 5288574Abstract: A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of titanyl phthalocyanine photogenerating pigments and thereover a charge transport layer, and wherein said photogenerating pigments are prepared by a process which comprises the formation of a slurry comprised of dihalotitanium phthalocyanine in a mixture comprised of a trihaloacetic acid and an alkylene chloride; adding the resultant slurry to a mixture of an aliphatic alcohol and water enabling hydrolysis whereby Type X oxytitanium phthalocyanine is obtained; separating the Type X oxytitanium phthalocyanine from the slurry; and thereafter subjecting the Type X oxytitanium phthalocyanine obtained to treatment with a halobenzene, followed by the separation of Type IV oxytitanium phthalocyanine photogenerating pigments.Type: GrantFiled: September 14, 1992Date of Patent: February 22, 1994Assignee: Xerox CorporationInventors: Denis Desilets, Trevor I. Martin, Cheng-Kuo Hsiao, Terry L. Bluhm
-
Patent number: 5286590Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.Type: GrantFiled: June 11, 1993Date of Patent: February 15, 1994Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
-
Patent number: 5286589Abstract: An electrophotographic photosensitive member has a photosensitive layer on an electroconductive support. The photosensitive layer comprises a compound having a structure represented by the general formula (1) or (2) as a charge-generating material: ##STR1## wherein A.sub.1 and A.sub.3 are respectively an alkyl radical, an aralkyl radical, an aromatic radical or a heterocyclic radical which may have a substituent; A.sub.2 is hydrogen atom, or an alkyl radical, an aralkyl radical, an aromatic radical, or a heterocyclic radical which may have a substituent; A.sub.1 and A.sub.2 may be the same with or different from each other; A.sub.1 and A.sub.2 may be linked together to form a ring; and n is an integer of 1, 2, or 3.Type: GrantFiled: November 12, 1992Date of Patent: February 15, 1994Assignee: Canon Kabushiki KaishaInventors: Shintetsu Go, Kazushi Iuchi, Toshie Miyaji, Hajime Miyazaki, Hideyuki Takai, Masakazu Matsumoto
-
Patent number: 5283146Abstract: A photoconductive phthalocyanine composition is disclosed, comprising (A) a photoconductive phthalocyanine composition comprising 100 parts by weight of an unsubstituted phthalocyanine derivative and from 0.001 to 5 parts by weight of a nitro- or halogen-substituted phthalocyanine derivative and (B) from 0.01 to 10 parts by weight, per 100 parts by weight of the photoconductive phthalocyanine composition (A), of a phthalocyanine derivative having at least 4 electron attracting groups. A photosensitive layer formed of the photoconductive phthalocyanine composition produces digital signals whether input light is digital or not. It is useful as not only a photoreceptor for digital recording system of electrophotography but a photoreceptor for analogue light input in conventional PPC to provide a high quality image with sharp edges.Type: GrantFiled: June 29, 1992Date of Patent: February 1, 1994Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Toyoshi Ohashi, Toshiaki Ishibashi, Junko Gouda, Akira Itsubo, Toshiyuki Koyama, Masatomi Ozawa, Katsutosi Iijima
-
Patent number: 5283145Abstract: Dichlorotin phthalocyanine crystals having distinct diffraction peaks at (i) 8.7.degree., 9.9.degree., 10.9.degree., 13.1.degree., 15.2.degree., 16.3.degree., 17.4.degree., 21.9.degree. and 25.5.degree., or (ii) 9.2.degree., 12.2.degree., 13.4.degree., 14.6.degree., 17.0.degree. and 25.3.degree. of the Bragg angle (2.theta..+-.0.2) to a CuK.alpha. characteristic X-ray; a method of preparing dichlorotin phthalocyanine crystals having the strongest diffraction peak at 28.2.degree. in the range of from 25.degree. to 30.degree. of the Bragg angle (2.theta..+-.0.2) in an X-ray diffraction spectrum; and an electrophotographic photoreceptor comprising an electroconductive support having thereon a light-sensitive layer containing the dichlorotin phthalocyanine crystals having distinct diffraction peaks at the particular angles or the dichlorotin phthalocyanine crystals prepared by the method.Type: GrantFiled: April 27, 1992Date of Patent: February 1, 1994Assignee: Fuji Xerox Co., Ltd.Inventors: Katsumi Nukada, Akira Imai, Yasuo Sakaguchi, Katsumi Daimon, Masakazu Iijima, Toru Ishii, Kiyokazu Mashimo
-
Patent number: 5283144Abstract: A photoreceptor includes a charge generating layer having: 1) a photogenerating pigment purified by sublimation at a pressure not greater than 10.sup.-3 Torr and subsequent condensation of the photogenerating pigment at a temperature less than about 100.degree. C.; and 2) a film-forming binder.Type: GrantFiled: September 2, 1992Date of Patent: February 1, 1994Assignee: Xerox CorporationInventors: Anthony T. Ward, George Liebermann, Ah-Mee Hor, Giuseppa Baranyi, Donald J. Teney
-
Patent number: 5281503Abstract: A photogenerating pigment has the formula: ##STR1## wherein A is the residual structure of an aromatic amine, p is an integer 1, 2, 3, 4, etc. depending on the amine structure, m is an integer 0, 1, 2, 3, or 4 and X may be selected from the group including but not limited to F, Cl, Br, NO.sub.2, CN, OH, NH.sub.2, OCH.sub.3, OCH.sub.2 CH.sub.3, CF.sub.3, alkyl and aromatic groups.Type: GrantFiled: April 17, 1992Date of Patent: January 25, 1994Assignee: Xerox CorporationInventors: Kock-Yee Law, Ihor W. Tarnawskyj
-
Patent number: 5275898Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein.Type: GrantFiled: February 10, 1993Date of Patent: January 4, 1994Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
-
Patent number: 5275899Abstract: Photoconductive compositions useful in the fabrication of digital, laser-imaged offset printing plates. The compositions comprise a mixture of (a) an infrared-sensitive organic photoconductor sensitive to light in the wavelength range of 700-9090 nm; (b) a visible light-sensitive organic photoconductor sensitive to light in the wavelength range of 400-700 nm; (c) an ultraviolet-sensitive organic photoconductor sensitive to light in the wavelength range of 300-400 nm; and (d) a binder.Type: GrantFiled: April 13, 1992Date of Patent: January 4, 1994Assignee: Sun Chemical CorporationInventors: Ken-ichi Shimazu, Jayanti S. Patel, Nishith V. Merchant
-
Patent number: 5274084Abstract: An azo compound represented by the following general formula IA and an electrophotographic photosensitive member comprising a photosensitive layer containing the azo compound: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different from each other and indicate a hydrogen atom, an alkyl group, an alkenyl group, a hydroxyl group, an alkoxy group, a carboxy group, an alkoxy carbonyl group, an acyl group, an aryl group, a halogen group or a cyano group, respectively; R.sup.14 indicates a hydrogen atom, a halogen group, an alkyl group, an alkoxy group, an aryl group, an amino group, a cyano group, a nitro group or a sulfoxide group; and A indicates a coupler residue having an acceptor property.Type: GrantFiled: November 24, 1992Date of Patent: December 28, 1993Assignee: Mita Industrial Co., Ltd.Inventors: Eiichi Miyamoto, Yasuyuki Hanatani, Hiroaki Iwasaki, Yasufumi Mizuta, Akihiko Kawahara
-
Patent number: 5270142Abstract: An ionographic imaging member having a conductive layer and a charge accepting layer, wherein the charge accepting layer is sufficiently photosensitive to provide erasure of residual charge in the member by exposure to light.Type: GrantFiled: June 27, 1990Date of Patent: December 14, 1993Assignee: Xerox CorporationInventor: Christopher Snelling
-
Patent number: 5270139Abstract: A new organophotoconductor comprising a conductive substrate, a charge generation layer and a charge transport layer wherein the charge generation layer comprises a bisazo compound and a squarylium compound as the charge generation material. The organophotoconductor exhibits high sensitivity, low residual potential and improved durability and reproducibility.Type: GrantFiled: July 2, 1992Date of Patent: December 14, 1993Assignee: Industrial Technology Research InstituteInventors: Feng-Wen Yeng, Jia-Ming Liu
-
Patent number: 5268246Abstract: An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon comprising a novel pyrene-ring-containing olefin compound having formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 each represent hydrogen or an alkyl group which may have a substituent; Y is an aliphatic hydrocarbon group which may have a substituent, a cyclic hydrocarbon group which may have a substituent, or an aromatic group which may have a substituent; n is an integer of 0 or 1, and m is an integer of 1 to 3, provided that when n is 0, m is 1, R.sup.1 is hydrogen, and Y is an aromatic group with a substituent ##STR2## R.sup.5 and R.sup.3 each represent hydrogen, and Y and R.sup.1 may be bonded to form a ring, a method of synthesizing the pyrene-ring-containing olefin compound and an intermediate therefor are disclosed.Type: GrantFiled: April 9, 1991Date of Patent: December 7, 1993Assignee: Ricoh Company, Ltd.Inventors: Tamotsu Aruga, Masaomi Sasaki, Tomoyuki Shimada, Hiroshi Adachi
-
Patent number: 5266430Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.Type: GrantFiled: November 30, 1992Date of Patent: November 30, 1993Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
-
Patent number: 5252417Abstract: A novel titanyl phthalocyanine crystal showing X-ray diffraction peaks at Bragg angles (2.theta..+-.0.2) of 27.2.degree., 24.0.degree., 18.0.degree., 14.3.degree., and 9.5.degree. and an electrophotographic photoreceptor containing the same as a charge generating layer are disclosed. The photoreceptor exhibits high photosensitivity and durability.Type: GrantFiled: March 19, 1991Date of Patent: October 12, 1993Assignee: Fuji Xerox Co., Ltd.Inventors: Akihiko Tokida, Yasuo Sakaguchi, Hidemi Nukada, Kohichi Yamamoto, Katsumi Daimon
-
Patent number: 5248580Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a ladder polymer selected from the group consisting of those represented by the following formulas: ##STR1## and mixtures thereof, wherein n represents the number of segments, and a charge transport layer.Type: GrantFiled: March 2, 1992Date of Patent: September 28, 1993Assignees: Xerox Corporation, University of RochesterInventors: Milan Stolka, Martin A. Abkowitz, Beng S. Ong, Samson A. Jenekhe
-
Patent number: 5240797Abstract: Thin film devices including a film of a functional organic material, inorganic material or mixtures which are either insoluble or sparingly soluble in water, and deposited by electroplating. Particles of the functional material are dispersed in a micelle solution of a surfactant which is oxidizable and reducible by electrolysis in a colloidal state. Thin film devices prepared include color filters, optical recording media, electrochemical photoreceptors, nonlinear switching elements, and other devices requiring thin films of materials which are substantially insoluble in water.Type: GrantFiled: June 13, 1991Date of Patent: August 31, 1993Assignee: Seiko Epson CorporationInventors: Fumiaki Matsushima, Mitsuro Atobe, Yoshihiro Ono, Yasuto Nose
-
Patent number: 5238766Abstract: The invention provides a coating composition comprising a coating solution of a polymeric binder and an organic solvent having a gamma.sub.c hydrogen bonding parameter value greater than 9.0, the coating solution having dispersed therein a titanyl fluorophthalocyanine pigment which has been acid-pasted or salt-milled to increase its photosensitivity and then has been brought into contact with an organic solvent having a gamma.sub.c hydrogen bonding parameter value less than 8.0 to preserve its increased photosensitivity, prior to the pigment's being dispersed in the coating solution.Type: GrantFiled: February 13, 1992Date of Patent: August 24, 1993Assignee: Eastman Kodak CompanyInventors: Michel F. Molaire, Robert J. Patti
-
Patent number: 5238764Abstract: The invention provides an electrophotographic element comprising an electrically conductive substrate and a photoconductive layer, wherein the photoconductive layer has been formed from a coating solution of a polymeric binder and an organic solvent having a gamma.sub.c hydrogen bonding parameter value greater than 9.0, the coating solution having dispersed therein a titanyl fluorophthalocyanine pigment which has been acid-pasted or salt-milled to increase its photosensitivity and then has been brought into contact with an organic solvent having a gamma.sub.c hydrogen bonding parameter value less than 8.0 to preserve its increased photosensitivity, prior to the pigment's being dispersed in the coating solution.Type: GrantFiled: February 13, 1992Date of Patent: August 24, 1993Assignee: Eastman Kodak CompanyInventors: Michel F. Molaire, Robert J. Patti
-
Patent number: 5229237Abstract: An electrophotographic photosensitive member is produced by coating an electroconductive substrate with a compound represented by formula (1) shown below and a compound represented by formula (2) shown below respectively by spray-coating through separate spraying means to form a photosensitive layer containing the compounds represented by the formulae (1) and (2) respectively on the electroconductive substrate: ##STR1## In the above formulae (1) an (2), Ar.sub.1 and Ar.sub.2 independently denote an aromatic hydrocarbon ring which may have a substituent, a heterocyclic aromatic ring which may have a substituent, or a ring assembly formed by bonding the aromatic rings directly or through an aromatic or non-aromatic bonding group; and R.sub.1 -R.sub.5 independently denote hydrogen atom, halogen atom, alkyl group, alkoxy group, nitro group or cyano group.Type: GrantFiled: April 10, 1991Date of Patent: July 20, 1993Assignee: Canon Kabushiki KaishaInventors: Yoichi Kawamorita, Hisao Maruyama, Kazushige Nakamura
-
Patent number: 5227271Abstract: An electrophotographic photosensitive member, comprising: an electroconductive support and a photosensitive layer disposed on the electroconductive support, wherein the photosensitive layer comprises (i) oxytitanium phthalocyanine having a crystal form characterized by main peaks specified by Bragg angles (2.theta..+-.0.2 degree) of 9.0 degrees, 14.2 degrees, 23.9 degrees and 27.1 degrees in X-ray diffraction pattern based on CuK.alpha. characteristic X-rays, and (ii) a fluorene compound represented by the following formula (I): ##STR1## wherein Ar.sup.1 and Ar.sup.2 independently denote aryl group optionally having a substituent; R.sup.1 and R.sup.2 independently denote alkyl group optionally having a substituent, aralkyl group optionally having a substituent or aryl group optionally having a substituent; and R.sup.3 denotes hydrogen atom, alkyl group optionally having a substituent, alkoxy group optionally having a substituent, hydroxyl group or halogen atom.Type: GrantFiled: October 22, 1991Date of Patent: July 13, 1993Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Akihiro Senoo, Takakazu Tanaka
-
Patent number: 5225551Abstract: An imaging member comprised of a supporting substrate, a photogenerating layer comprised of a titanyl phthalocyanine of the type selected from the group consisting of Type IV, Type X, Type Z-1, and Type Z-2, prepared by the process which comprises dissolving a titanyl phthalocyanine in a solution of trifluoroacetic acid and methylene chloride; adding the resultant solution to a solvent or solvent mixture that will enable precipitation; and separating the product titanyl phthalocyanine from the solution followed by an optional washing, and a charge transport layer.Type: GrantFiled: October 5, 1992Date of Patent: July 6, 1993Assignee: Xerox CorporationInventors: James M. Duff, James D. Mayo, Cheng-Kuo Hsiao, Ah-Mee Hor, Terry L. Bluhm, Gordon K. Hamer, Peter M. Kazmaier
-
Patent number: 5219689Abstract: The invention provides an electrophotographic photoreceptor of high sensitivity and high endurance which comprises a conductive support and a light-sensitive layer which contains at least one bis-azo compound selected from the group consisting of those represented by the following formulas (I)-(II): ##STR1## wherein n represents 0, 1, or 3; R.sup.1 represents a halogen atom, a hydroxyl group, or an alkyl, aralkyl, aryl, hyterocyclic or alkoxy group which may have a substituent and when n is 2 or 3, R.sup.1 may be identical or different; R.sup.2 represents a hydrogen atom, a halogen atom, a cyano group, or an ester, alkyl, aralkyl or aryl group which may have a substituent; R.sup.3 represents an alkyl, aralkyl, aryl or heterocyclic group which may have a substituent; Ar represents an arylene which may have a substituent; and A.sup.1 and A.sup.2 each represents an aryl or heterocyclic group which has a hydroxyl group and may be identical or different.Type: GrantFiled: August 8, 1991Date of Patent: June 15, 1993Assignee: Mitsubishi Paper Mills LimitedInventors: Akira Itoh, Hideki Nagamura
-
Patent number: 5215840Abstract: An electrophotographic photoreceptor and a method for producing the same are disclosed, in which stability of coating solution of a photoreceptive layer is improved. The photoreceptor comprises a conductive support having thereon a photoreceptive layer containing a binder, a titanylphthalocyanine which has a peak in X-ray diffraction spectrum thereof by Cu-K.alpha. ray at a Bragg angle 2.theta. of 27.2.degree..+-.0.2.degree., and a phthalocyanine derivative formed by reaction of phthalocyanine and a titanium compound represented by the following formula I or II; ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each a group capable of releasing upon reaction with said phthalocyanine.Type: GrantFiled: November 15, 1991Date of Patent: June 1, 1993Assignee: Konica CorporationInventors: Akihiko Itami, Akira Kinoshita, Kazumasa Watanabe
-
Patent number: 5214141Abstract: The present invention relates to an azomethine compound represented by formula (I): ##STR1## wherein X represents a 5- or 6-membered cyclic amino group, R represents an aromatic group, and Ar represents an aromatic group having an aliphatic amino group in the para-position. The azomethine compounds disclosed are useful yellow dyes for photography, for various optical filters, for ink jet, for heat transfer printing, and for printing.Type: GrantFiled: December 31, 1991Date of Patent: May 25, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Masuji Motoki, Naoki Saito, Takayoshi Kamio, Mitsugu Tanaka, Seiji Ichijima
-
Patent number: 5213929Abstract: A new composition of titanyl phthalocyanine is provided. This composition has in its infrared absorption spectrum characteristically strong absorptions at absorption wavenumbers (in unit of cm.sup.-1) of 1490.+-.2, 1415.+-.2, 1332.+-.2, 1119.+-.2, 1072.+-.2, 1060.+-.2, 961.+-.2, 893.+-.2, 780.+-.2, 751.+-.2 and 730.+-.2, and has an extremely high solvent stability and dispersibility, and a large photoelectric conversion efficiency. The new form of composition can be obtained by adding to titanyl phthalocyanine, compounds of other phthalocyanines or naphthalocyanines as additives, and treating the amorphous composition of the mixture to crystallize the composition. By applying an appropriate binder, with the novel composition crystals as a charge generation agent, on a substrate, it is possible to obtain an electrophotographic photosensitive material that has a charge generation layer with an extremely high dispersibility and an extremely large photoelectric conversion efficiency.Type: GrantFiled: June 6, 1990Date of Patent: May 25, 1993Assignee: NEC CorporationInventors: Shigemasa Takano, Yoshikazu Mimura, Naoyuki Matsui, Tomohisa Gotoh, Mitsuo Usuba
-
Patent number: 5206103Abstract: A photoresponsive imaging member comprised of a photogenerating layer, and a charge transport layer comprised of a mixture of a biphenyl diamine and a polysilylene.Type: GrantFiled: January 14, 1991Date of Patent: April 27, 1993Assignee: Xerox CorporationInventors: Milan Stolka, Martin A. Abkowitz
-
Patent number: 5204200Abstract: There is disclosed a laminated organic photosensitive material which comprises an electroconductive support, an undercoat, a charge producing layer and a charge transporting layer in sequence wherein the undercoat is composed of an alcohol soluble polyamide resin and wherein the charge producing layer contains X-type nonmetal phthalocyanine as a charge producing substance and a mixture of a vinyl chloride-etyhylene copolymer in an amount of 40-95% by weight and a vinyl chloride-vinyl acetate-maleic acid copolymer in an amount of 5-60% by weight based on the mixture as a binder resin for the layer.Type: GrantFiled: February 7, 1991Date of Patent: April 20, 1993Assignee: Bando Chemical Industries, Ltd.Inventors: Tomokazu Kobata, Yosuke Matsui
-
Patent number: 5202207Abstract: An electrophotographic photosensitive member comprises an electroconductive support and a photosensitive layer formed on the support.Type: GrantFiled: March 28, 1991Date of Patent: April 13, 1993Assignee: Canon Kabushiki KaishaInventors: Tetsuro Kanemaru, Shin Nagahara, Akihiro Senoo
-
Patent number: 5198318Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The one type of the bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.Type: GrantFiled: November 27, 1991Date of Patent: March 30, 1993Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Masayo Amano, Noboru Furusho
-
Patent number: 5194354Abstract: There are disclosed low crystalline oxytitanium phthalocyanines which have characteristic strong peaks at specific angles of Bragg angle 2.theta..+-.0.2.degree.. Using the low crystalline oxytitanium phthalocyanines, it is easy to obtain oxytitanium phthalocyanines having novel crystal forms. Electrophotographic photosensitive member containing the oxytitanium phthalocyanines having novel crystal forms have a very high photosensitivity to beams of long wavelength, a ver high potential stability as well as excellent durability in repetitive use.Type: GrantFiled: July 23, 1990Date of Patent: March 16, 1993Assignee: Canon Kabushiki KaishaInventors: Hideyuki Takai, Kazushi Iuchi, Itaru Yamazaki, Hajime Miyazaki
-
Patent number: 5192632Abstract: An electrophotographic photosensitive member has an electroconductive support and a photosensitive layer formed thereon. The photosensitive layer contains a compound represented by the general formula (1) below: ##STR1## wherein Z.sub.1 and Z.sub.2 are each independently a hydrogen atom, an alkyl group, a halogen atom, an alkoxy group, a nitro group, a cyano group, or a trifluoromethyl group; A.sub.1 and A.sub.2 are each a coupler residue having a phenolic hydroxyl group, which may be the same or different; and n is an integer of 1 or 2.Type: GrantFiled: July 29, 1991Date of Patent: March 9, 1993Assignee: Canon Kabushiki KaishaInventors: Satomi Ohmura, Yoshio Kashizaki
-
Patent number: 5190839Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor contains in a light sensitive layer thereof a titanylphthalocyanine having specific crystalline characteristics as defined in the specification and a polycyclic quinone pigment or a bisazo pigment as defined in the specification. The photoreceptor has a high sensitivity over a broad wavelength region, especially near-infrared range. It is suitably used for a laser printer.Type: GrantFiled: June 29, 1990Date of Patent: March 2, 1993Assignee: Konica CorporationInventors: Yoshihide Fujimaki, Hajime Tadokoro, Yasuhiro Oda, Hiroshi Yoshioka
-
Patent number: 5189156Abstract: A process for the preparation of titanyl phthalocyanine which comprises the reaction of a titanium tetraalkoxide and diiminoisoindolene in the presence of a halonaphthalene solvent; dissolving the resulting Type I titanyl phthalocyanine in a haloacetic acid and an alkylene halide; adding the resulting mixture slowly to a cold alcohol solution; and thereafter isolating the resulting Type X titanyl phthalocyanine with an average volume particle size diameter of from about 0.02 to about 0.5 micron.Type: GrantFiled: April 1, 1991Date of Patent: February 23, 1993Assignee: Xerox CorporationInventors: James D. Mayo, Sandra J. Gardner
-
Patent number: 5189155Abstract: A process for the preparation of titanyl phthalocyanine Type I which comprises the reaction of titanium tetraalkoxide and diminoisoindolene in the presence of a halonaphthalene solvent.Type: GrantFiled: April 11, 1991Date of Patent: February 23, 1993Assignee: Xerox CorporationInventors: James D. Mayo, Terry L. Bluhm, Cheng K. Hsiao, Trevor I. Martin, Ah-Mee Hor
-
Patent number: 5182382Abstract: A process for the preparation of titanyl phthalocyanine Type X which comprises dissolving titanyl phthalocyanine Type I in a solution of trifluoroacetic acid and methylene chloride; adding the resultant solution to a solvent enabling precipitation of Type X titanyl phthalocyanine; separating the titanyl phthalocyanine Type X from the solution; followed by a first washing with an organic solvent and a second washing with water; and thereafter a solvent treatment with fluorobenzene.Type: GrantFiled: May 28, 1991Date of Patent: January 26, 1993Assignee: Xerox CorporationInventors: James D. Mayo, James M. Duff, Terry L. Bluhm, Cheng K. Hsiao
-
Patent number: 5178981Abstract: A photoconductor for electrophotography includes an electroconductive substrate; and a photosensitive layer formed on the substrate. The photosensitive layer includes a charge generating substance consisting essentially of at least one polycyclic compound represent by general formula (I) and at least one azo compound represented by general formula (II). ##STR1## wherein X is selected from the group consisting of a hydrogen atom, a halogen atom and a cyano group and n is an integer of 0 to 4; ##STR2## wherein R is selected from the group consisting of a hydrogen atom, a halogen atom and a substituted or unsubstituted alkyl group and alkoxy group, Z1 is selected from the group consisting of a substituted or unsubstituted alkyl group, aryl group and aromatic heterocyclic group, Z.sub.2 is selected from the group consisting of a hydrogen atom, a cyano group, a carbomoyl group, a carboxyl group, an ester group and an acyl group, each of Z.sub.3 and Z.sub.Type: GrantFiled: February 27, 1991Date of Patent: January 12, 1993Assignee: Fuji Electric Co., Ltd.Inventors: Yoshimasa Hattori, Yoshinobu Sugata, Masami Kuroda, Noboru Furusho
-
Patent number: 5168022Abstract: In a process for preparing a photoconductive pigment having a small particle size, a polymorph of a pigment is produced by a conversion process wherein a seed amount of the desired polymorph of the pigment and a larger amount of another polymorph of the pigment are subjected to a liquid jet interaction process.Type: GrantFiled: December 31, 1990Date of Patent: December 1, 1992Assignee: Xerox CorporationInventors: Eric B. Wasmund, T. Edward Petroff
-
Patent number: 5168025Abstract: An electrophotographic photoreceptor comprising an electrically conductive support and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the formula (I): ##STR1## wherein each of Ar.sup.1 and Ar.sup.2 which may be the same or different, is an arylene group which may have substituents, each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which may be the same or different, is an alkyl group which may have substituents, an aryl group which may have substituents, or a heterocyclic group which may have substituents, provided that R.sup.1 may, together with R.sup.2 or Ar.sup.1, form a ring containing the adjacent nitrogen atom, and R.sup.3 may, together with R.sup.4 or Ar.sup.2, form a ring containing the adjacent nitrogen atom, each of R.sup.5, R.sup.6, R.sup.7 and R.sup.Type: GrantFiled: September 11, 1991Date of Patent: December 1, 1992Assignee: Mitsubishi Kasei CorporationInventors: Hitoshi Ono, Atsuo Saita
-
Patent number: 5166025Abstract: An electrophotographic plate-making quality matrix plate provided on an electroconductive substrate thereof with a photosensitive layer formed of an alkali-soluble binder resin containing an organic photoelectroconductive compound, which matric plate is characterized by the fact that said organic photoelectroconductive compound is a zinc phthalocyanine represented by the general formula I: ##STR1## wherein R is a --SZ group (where Z is a phenyl group, a phenyl group substituted with an alkyl group of 1 to 5 carbon atoms, or a naphthyl group), and said binder resin is a copolymer obtained by polymerizing a monomer mixture comprising (a) at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, (b) at least one copolymerizable unsaturated carboxylic acid, (c) at least one styrene compound, and (d) at least one compound selected from among acrylic esters other than said hydroxyalkyl acryaltes of (a).Type: GrantFiled: June 6, 1991Date of Patent: November 24, 1992Assignee: Nippon Shokubai Co., Ltd.Inventors: Osamu Kaieda, Kiyoshi Masuda, Hideki Ito, Takashi Yodoshi
-
Patent number: 5166339Abstract: Disclosed are various titanyl phthalocyanine polymorphs such as Type I, Type II, Type III, Type IV, Type Z-1, Type Z-2, and Type X, which phthalocyanines can be prepared by dissolving a titanyl phthalocyanine in a solution of trifluoroacetic acid and a chlorinated hydrocarbon. There is then added to the resulting solution a solvent that will enable precipitation of the titanyl phthalocyanine. Subsequently, the titanyl phthalocyanine product can be separated from the solution by, for example, filtration and the product titanyl phthalocyanine obtained can be washed to remove any residual solvent.Type: GrantFiled: June 4, 1990Date of Patent: November 24, 1992Assignee: Xerox CorporationInventors: James M. Duff, James D. Mayo, Cheng-Kuo Hsiao, Ah-Mee Hor, Terry L. Bluhm, Gordon K. Hamer, Peter M. Kazmaier
-
Patent number: 5158848Abstract: A photoconductor for electrophotography comprises a substrate and a photosensitive layer formed thereon and including a novel hydrazone compound as a charge transporting substance. The hydrazone compound is represented by the following general formula: ##STR1## Wherein, A is selected from the residual group consisting of an aromatic residual group, a condensed polycyclic residual group, and a heterocyclic residual group, which groups may be or not may be substituted, R.sub.1 is selected from the atom or group consisting of any one of a hydrogen atom, a halogen atom, an alkyl group, an acyl group or a dialkylamino group, and each of R.sub.2 and R.sub.3 is selected from the group consisting of an alkyl group, an aryl group, an alkenyl group, an aralkyl group and a thenyl group, which groups may be or not may be substituted.Type: GrantFiled: January 15, 1991Date of Patent: October 27, 1992Assignee: Fuji Electric Co., Ltd.Inventors: Masami Kuroda, Yoshinobu Sugata, Noboru Furusho