Additional Diverse Ring Hetero Atom In The Hetero Ring Patents (Class 430/77)
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Patent number: 4965155Abstract: Disclosed is an organic photoconductive material for the electrophotography, which comprises a linear high-molecular-weight polymer having a rhodanine derivative of the following formula incorporated as a substituent: ##STR1## In this derivative group, a benzylidene group or the like is bonded to the 5-position of the rhodanine ring. A photosensitive material comprising a polymer having this rhodanine derivative group shows a photoconductivity to visible rays even without addition of a charge-generating pigment.Type: GrantFiled: December 2, 1988Date of Patent: October 23, 1990Assignee: Mita Industrial Co., Ltd.Inventors: Toshihiko Nishiguchi, Mika Yamamura
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Patent number: 4952472Abstract: Disclosed is an improved layered photoresponsive imaging member comprised of a supporting substrate, a vacuum evaporated photogenerator layer comprised of certain fractionaklly sublimed indigoid pigments such as 4,4,7,7'-tetrachlorothioindigo; and an aryl amine hole transport layer comprised of molecules of the following formula: ##STR1## dispersed in a resinous binder and wherein X is selected from the group consisting of halogen and alkyl.Type: GrantFiled: July 1, 1988Date of Patent: August 28, 1990Assignee: Xerox CorporationInventors: Giuseppa Baranyi, Ah-Mee Hor, Rafik O. Loutfy
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Patent number: 4939053Abstract: The present invention relates to a photosensitive member containing a specific azo compound for a charge generating agent, which is improved in photosensitive properties, in particular, sensitivity. The specific azo compound is represented by the formula (1): ##STR1## wherein A represents an aromatic hydrocarbon or a heterocyclic ring; R.sub.1 and R.sub.2 independently represent a hydrogen, a halogen atom, or an alkyl, aralkyl, aryl, condensed polycyclic ring or condensed heterocyclic ring; or R.sub.1 and R.sub.2 combinedly form a cyclic ring; n represents an integer from 1 to 4.Type: GrantFiled: February 10, 1988Date of Patent: July 3, 1990Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 4935322Abstract: The present invention relates to a photosensitive member containing a specific azo compound represented by the following general formula (I); ##STR1## wherein A is a bivalent atom-group which forms a hydrocarbon ring or a heterocyclic ring with carbon atom of carbonyl group; A may have a substituent; R.sub.1 and R.sub.2 are independently selected from the group consisting of hydrogen, an alkyl group, an alkoxy group, a halogen atom and a cyano group; Cp is a residual group of a coupler with a phenolic OH group, which is improved in photosensitive properties, in particular, sensitivity.Type: GrantFiled: January 6, 1989Date of Patent: June 19, 1990Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 4931349Abstract: An electrophotographic photoreceptor is provided with a photosensitive layer, which contains an azo compound having in the molecule thereof at least one azo group coupled with a coupler residuum represented by the following general formula (I): ##STR1## wherein X means a residuum capable of condensing with a benzene ring to form a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, Y denotes a hydrogen or halogen atom or alkyl or alkoxy group, and n stands for an integer of 0-3.Type: GrantFiled: December 1, 1987Date of Patent: June 5, 1990Assignee: Dainichiseika Color & Chemicals Mfg. Co.Inventors: Masaru Hasegawa, Osamu Suda, Hisao Kohno, Toshifumi Sekino, Tetsuhiro Umezaki, Norio Tanaka
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Patent number: 4921770Abstract: Disclosed herein is a photoreceptor for electrophotography comprising a conductive substrate and a photosensitive layer thereon containing an azo compound represented by the formula (I):A-N=N-D-N=N-B (I)wherein A represents a coupling component derived from the following formula (II): ##STR1## wherein Q represents a divalent group derived from an aromatic hydrocarbon which may have one or more substituents or a divalent group derived from a heterocyclic compound which may have one or more substituents, B represents a different coupling component having a phenolic hydroxyl group from said A, and D represents a divalent group in which the carbon atoms bonded to the azo groups are SP.sup.2 carbon atoms forming double bonds.Type: GrantFiled: August 4, 1988Date of Patent: May 1, 1990Inventors: Tetsuo Murayama, Shinji Aramaki
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Patent number: 4913997Abstract: This provides an electrophotographic photoreceptor high in durability and sensitivity which comprises an electroconductive support and, provided thereon, a photosensitive layer containing an azo pigment represented by the formula [I]: ##STR1## wherein A represents an aryl group, a heterocyclic group or an alkyl group, Z represents a hydrogen atom, --B or --CH.dbd.CH--B wherein B represents an aryl group, a heterocyclic group or an alkyl group and Cp represents a coupler residue.Type: GrantFiled: January 12, 1989Date of Patent: April 3, 1990Assignee: Mitsubishi Paper Mills LimitedInventors: Kazuhiro Emoto, Kozo Haino
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Patent number: 4892799Abstract: The invention relates to 4-chlorooxazole derivatives of the general formula I ##STR1## which carry an unsaturated group in the 2- or 5-position, e.g., the --CH.dbd.CH-- or --CH.dbd.CH--CH.dbd.CH-- group.In the formulaR.sub.1 is phenyl, which is optionally substituted in one or more positions by (C.sub.1 -C.sub.4)-alkoxy or di-(C.sub.1 -C.sub.4)-alkylamino radicals andR.sub.2 is phenyl, phenyloxazolyl, pyridyl, julolidin-9-yl, N-(C.sub.1 -C.sub.4 -alkyl)-carbazol-3-yl, coumarin-6-yl, or stilben-4-yl, which are optionally substituted in one or more positions by (C.sub.1 -C.sub.4)-alkyl, (C.sub.1-C.sub.4)-alkoxy, halogen-(C.sub.1 -C.sub.4)-alioxy, hydroxy, halogen, di-(C.sub.1 -C.sub.4)-alkylamino, or dibenzylamino radicals.The compounds are used as photoconductive substances.Type: GrantFiled: March 1, 1988Date of Patent: January 9, 1990Assignee: Hoechst AktiengesellschaftInventors: Rainer Wingen, Dieter Guenther, Juergen Lingnau
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Patent number: 4885369Abstract: A photoconductive material for use in electrophotography comprising a rhodanine derivative and a halogen-containing polymer. The marked feature of the invention is to use a compound of the following formula ##STR1## wherein X represents ##STR2## and R represents a substituent such as an alkyl, aryl or amino group.Type: GrantFiled: November 30, 1988Date of Patent: December 5, 1989Assignee: Mita Industrial Co., Ltd.Inventors: Toshiyuki Uryu, Toshihiko Nishiguchi
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Patent number: 4880718Abstract: An electrophotographic recording element comprising(A) an electrically conducting base and(B) at least one photoconductive layer consisting essentially of(b.sub.1) at least one binder,(b.sub.2) at least one sensitizer which on exposure of layer (B) generates charge carriers and which is selected from the group of the isoindolenine dyes of the general structure I ##STR1## where the index and the variables have specified meanings, (b.sub.3) at least one index and the variables have specified the generated charge carriers and optionally(b.sub.4) additives,is useful for reprographic purposes, for producing printing plates, in particular offset plates, and for producing photoresists.Type: GrantFiled: November 22, 1988Date of Patent: November 14, 1989Assignee: BASF AktiengesellschaftInventors: Reinhold J. Leyrer, Peter Neumann
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Patent number: 4871636Abstract: A photoconductor for electrophotography comprises a novel azo compound as a charge generating substance. An azo compound is represented by the following general formula: ##STR1## wherein, X.sub.1 stands for an alkyl group which may have a substituent(s) or a phenyl group which may have a substituent(s), X.sub.2 stands for a hydrogen atom, a cyano group, a carbamoyl group, an ester group, an acetyl group or a propyonyl group, each of X.sub.3 and X.sub.4 stands for a hydrogen atom, a halogen atom, a nitro group, an alkoxy group or an alkyo group which may have a substituent(s), and D stands for a substituent.Type: GrantFiled: December 21, 1988Date of Patent: October 3, 1989Assignee: Fuji Electric Co., Ltd.Inventors: Yoshimasa Hattori, Noboru Furusho
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Patent number: 4871637Abstract: Disclosed are a photoconductive composition containing a new bisazo compound of the following formula (1) and an electrophotographic photoreceptor having a photosensitive layer which contains the bisazo compound of the formula (1): ##STR1## wherein Z, B.sub.1, B.sub.2, A, and L are defined hereinafter. The electrophotographic photoreceptor has both high sensitivity and high durability, and the sensitivity thereof is barely lowered even after repeated use.Type: GrantFiled: September 19, 1988Date of Patent: October 3, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsugi Kitatani, Satoshi Hoshi
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Patent number: 4871633Abstract: The present invention uses an azo pigment having in the center of an N-oxide heterocyclic structure as a photoelectrical charge-generating material. The pigments are excellent in dispersion stability in a dispersed solution, and enable the provision of a photosensitive member excellent in sensitivity properties.Type: GrantFiled: November 24, 1987Date of Patent: October 3, 1989Assignees: Minolta Camera Kabushiki Kaisha, Osaka Municipal GovernmentInventors: Masakazu Takata, Takamasa Ueda, Kimiyuki Ito, Tsuneaki Hirashima, Souichi Yamamoto, Yoshio Ishino, Toshinobu Ohno
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Patent number: 4868079Abstract: An electrophotoconductor is disclosed, comprising a conductive support having provided thereon a photoconductive layer comprising a resin binder having dispersed therein an anthanthrone compound, a phthalocyanine compound, and an oxadiazole compound. The electrophotoconductor exhibits high sensitivity in the wavelength region of from 760 to 850 nm and high negative charge retention and is suitable for use in a recording device using a semiconductor laser as a light source.Type: GrantFiled: April 13, 1988Date of Patent: September 19, 1989Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Nguyen C. Khe, Masanobu Nakamura, Midori Fukawatase, Kenji Takahashi
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Patent number: 4865935Abstract: The present invention relates to a photosensitive member containing a specific azo compound for a charge generating agent, which is improved in photosensitive properties, in particular, sensitivity.Type: GrantFiled: February 10, 1988Date of Patent: September 12, 1989Assignee: Minolta Camera Kabushiki KaishaInventor: Hideaki Ueda
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Patent number: 4851315Abstract: A photoconductive film includes at least one kind of bis-azo pigments and exhibits a high sensitivity. The film may be used as an electrophotographic light-sensitive element.Type: GrantFiled: March 17, 1988Date of Patent: July 25, 1989Assignee: Alps Electric Co., Ltd.Inventors: Katsunori Fujio, Setsuo Ishibashi
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Patent number: 4830944Abstract: A function separated type electrophotographic photosensitive member for infrared rays comprises a combination of a charge generation material and a charge transport material, wherein the electrophotographic photosensitive member for infrared rays contains as the charge generation material a disazo pigment represented by Formula (1).Type: GrantFiled: December 19, 1986Date of Patent: May 16, 1989Assignee: Canon Kabushiki KaishaInventors: Shoji Umehara, Masakazu Matsumoto, Takao Takiguchi, Shozo Ishikawa
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Patent number: 4808507Abstract: Disclosed herein is an electrophotographic photoreceptor having high sensitivity and excellent durability. The photoreceptor has a photosensitive layer which contains at least one bisazo compound having the 2-phenyl-benzooxazole skeleton.Type: GrantFiled: August 28, 1987Date of Patent: February 28, 1989Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Yasuyuki Yamada, Hisato Itoh, Tsutomu Nishizawa, Akihiro Yamaguchi
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Patent number: 4800145Abstract: An organic photoconductor suitable for use in electro-reprography comprising an electrically conducting support, a charge generating phase comprising a charge generator and a charge transport phase characterized in that the charge generator is a phthalocyanine compound in which each of at least four of the peripheral carbon atoms numbered from 1 to 16 in the phthalocyanine nucleus shown below is linked, by an atom from Group VA or Group VIA of the Periodic Table, to a carbon atom of an organic radical.Type: GrantFiled: July 14, 1987Date of Patent: January 24, 1989Assignee: Imperial Chemical Industries, PLCInventors: Anthony J. Nelson, Peter J. Duggan
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Patent number: 4788119Abstract: The invention provides an electrophotographic photosensitive member having an improved sensitivity and an improved potential stability when repeatedly copied by using a photosensitive layer containing a disazo pigment having a specific molecular structure.Type: GrantFiled: May 27, 1986Date of Patent: November 29, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Hajime Miyazaki, Takao Takiguchi, Masakazu Matsumoto, Masaaki Hiro, Shozo Ishikawa
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Patent number: 4760003Abstract: An electrophotographic photosensitive member comprises a photosensitive layer on a substrate, said photosensitive layer comprising a disazo pigment represented by the formula (1).Type: GrantFiled: May 21, 1986Date of Patent: July 26, 1988Assignee: Canon Kabushiki KaishaInventors: Masakazu Matsumoto, Takao Takiguchi, Masataka Yamashita, Shoji Umehara, Shozo Ishikawa, Hajime Miyazaki
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Patent number: 4752548Abstract: Light-sensitive compositions are provided, containing at least one bisazulenium salt compound of the general formulae (1) and (2): ##STR1## wherein all the symbols are defined in the specification. Electrophotographic photoreceptors containing the present composition have high sensitivity and stable potential characteristic in repeated use. The present compositions are further usable in optical information-recording media, and the media containing the present composition have sufficient preservation stability, high sensitivity and sufficient S/N ratio.Type: GrantFiled: November 7, 1986Date of Patent: June 21, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Seiji Horie, Shu Watarai, Hideo Sato
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Patent number: 4743523Abstract: A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.Type: GrantFiled: March 27, 1986Date of Patent: May 10, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
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Patent number: 4735882Abstract: An electrophotographic photosensitive member comprises a photosensitive layer containing an azo pigment selected from the following general formulae (1) to (5): ##STR1## wherein groups Ar are arylene groups and divalent heterocyclic groups, each of which may contain a substituent; n is 0 or 1; and group A is a coupler residue group having a phenolic OH group.Type: GrantFiled: April 1, 1986Date of Patent: April 5, 1988Assignee: Canon Kabushiki KaishaInventors: Masataka Yamashita, Takao Takiguchi, Shoji Umehara, Masakazu Matsumoto, Shozo Ishikawa
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Patent number: 4731312Abstract: A function separation type photoconductor for use in electrophotography comprises an electroconductive substrate, a carrier generation layer vapor deposited on the substrate and a carrier transport layer formed on the carrier generation layer. The carrier generation layer is made of an indium phthalocyanine having the general formula ##STR1## wherein Me represents indium, and X is a halogen selected from the group consisting of chlorine, bromine and iodine.Type: GrantFiled: February 17, 1987Date of Patent: March 15, 1988Assignee: Oki Electric Industry Co., Ltd.Inventors: Masakazu Kato, Yoichi Nishioka, Katsuaki Kaife
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Patent number: 4731315Abstract: An electrophotographic photoreceptor is disclosed, comprising a conductive support having provided thereon a light-sensitive layer, wherein said light-sensitive layer contains a specific trisazo compound as a charge generating material and at least one of specific charge transporting materials. The photoreceptor exhibits high sensitivity and durability.Type: GrantFiled: August 8, 1986Date of Patent: March 15, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Seiji Horie, Naonori Makino, Hideo Sato
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Patent number: 4725520Abstract: An electrophotographic recording material comprising an electrically conducting layer support, an optional insulating intermediate layer, a photoconductive layer comprising at least one dyestuff as charge carrier-generating compound, and a layer containing a binder and photoconductor as charge-transport compound contains, as dyestuff in the photoconductive layer, a benzo-benzimidazo[1,2a]-quinoline derivative, preferably one represented by the formula ##STR1## Use of the dyestuff, in combination with a wide variety of photoconductors and binders, yields materials with excellent electrophotographic properties.Type: GrantFiled: October 8, 1986Date of Patent: February 16, 1988Assignee: Hoechst AktiengesellschaftInventors: Wolfgang Wiedemann, Hans-Matthias Deger, Dieter Guenther
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Patent number: 4666812Abstract: The photoconductor of an electrophotographic recording material comprising an electrically conductive support, an optional insulating interlayer, and a photoconductive single layer containing a binder, a dye or pigment sensitizer and a pyrimido[5',4':5,6]pyrido[1,2-a]benzimidazole charge transporting compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and are hydrogen or an R.sub.3,R.sub.4 N group; R.sub.3 and R.sub.4 are identical or different and are (C.sub.1 to C.sub.4)-alkyl, hydroxy-(C.sub.1 to C.sub.4)-alkyl, phenyl or benzyl which are unsubstituted or (C.sub.1 to C.sub.4)-alkyl-substituted, or, together with the N atom to which they are bonded, are an imidazolyl or triazolyl group; and R.sub.5 is a benzothiazole, a benzoxazole or a benzimidazole group, is photosensitive in the visible range around 430 to 500 nm and can be sensitized for the longer-wavelength region with dyes.Type: GrantFiled: January 24, 1986Date of Patent: May 19, 1987Assignee: Hoechst AktiengesellschaftInventors: Wolfgang Wiedemann, Dieter Guenther
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Patent number: 4666805Abstract: The present invention relates to a novel disazo compound having the following general formula (I), ##STR1## wherein A represents ##STR2## (wherein R represents an alkyl, alkoxy, nitro, halogen, cyano or halomethyl group; n represents an integer of 0, 1, 2 or 3; and R may be the same or different when n is an integer of 2 or 3), and a method for preparing the same.The present invention further relates to a photosensitive material for use in electrophotography, characterized by providing a photosensitive layer containing a disazo pigment having the following general formula (VII), ##STR3## wherein A.sub.1 represents a coupler residue and R' represents hydrogen or a lower alkyl group.Type: GrantFiled: June 11, 1985Date of Patent: May 19, 1987Assignee: Ricoh Co., Ltd.Inventor: Mitsuru Hashimoto
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Patent number: 4650737Abstract: An electrophotographic recording material comprising an electrically conductive base material, an option insulating intermediate layer, and a photoconductive double layer comprised of a charge-generating and a charge-transporting layer employs a pyrimido[5' ,4':5,6]-pyrido-[1,2-a]-benzimidazole transport compound, along with a binder and a dye or pigment, in the charge transporting layer, which compound is represented by the formula I ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and denote hydrogen or an R.sub.3 R.sub.4 N group; R.sub.3 and R.sub.4 are identical or different and denote (C.sub.1 to C.sub.4)-alkyl, hydroxy-(C.sub.1 to C.sub.4)-alkyl, optionally (C.sub.1 to C.sub.4)-alkyl-substituted phenyl or benzyl, or, together with the nitrogen atoms to which they are bonded, an imidazolyl or a triazolyl group; and R.sub.5 denotes a benzothiazole, a benzoxazole, a benzimidazole or a cyano group.Type: GrantFiled: January 24, 1986Date of Patent: March 17, 1987Assignee: Hoechst AktiengesellschaftInventor: Wolfgang Wiedemann
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Patent number: 4631242Abstract: An electrophotographic material comprises a conductive support and a light-sensitive layer containing at least one of the azo compound of the formulas [I]-[III]:formula [I]:Cp.sub.1 --N.dbd.N--A--N.dbd.N--Cp.sub.2A represents a divalent residue which bonds through C atoms to N atoms which constitute azo and Cp.sub.1 is a group of by the formula: ##STR1## Z represents a substituted or unsubstituted carbocyclic aromatic ring, a substituted or unsubstituted heterocyclic aromatic ring or a unsaturated monocyclic hydrocarbon ring and R represents an aryl group containing one or two CF.sub.3 groups and Cp.sub.2 is a coupler residue different from said Cp.sub.1 and is selected from following formulas (a)-(f): ##STR2## Z.sup.1 and Z.sup.2 represent a substituted or unsubstituted aromatic hydrocarbon ring or substituted or unsubstituted hetero ring, R.sup.1 and R.sup.2 represent substituted or unsubstituted alkyl, aralkyl, aryl or hetero ring group, R.sup.3 represents an alkyl or carboxyl group or an ester thereof, R.Type: GrantFiled: September 5, 1985Date of Patent: December 23, 1986Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuhiro Emoto, Kozo Haino, Akira Itoh
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Patent number: 4629671Abstract: Charge-transporting compounds which form substantially colorless layers having a minimal residual charge and a good cleanability are disclosed. These compounds are of the general formula: ##STR1## wherein R1, R2, and R3, individually, represent a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms. Also disclosed is a photoconductive element containing a charge-generating compound and a charge-transporting compound of the general formula shown above which is homogeneously distributed in a binder. The charge-transporting compounds of the general formula are very soluble in various solvents and film-forming polymers providing for great maneuverability in processing the compounds into layers.Type: GrantFiled: August 6, 1985Date of Patent: December 16, 1986Assignee: Oce-Nederland B.V.Inventors: Roelof H. Everhardus, Wilhelmus J. Bouts, Johannes J. M. Brands
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Patent number: 4619990Abstract: Polymeric dyes having pendent chromophore groups which are selected from azo, tricyanovinyl, anthraquinone, methine, and indoaniline groups fall into two classes, [A] condensation polymers, and [B] polymers derived from copolymerized ethylenically-unsaturated monomers, the dyes being capable of undergoing thermoplastic deformation by a focused laser beam when in a layer of thickness in the range of 0.1 to 100 micrometers and having an absorptivity in the range of 10 to 250 Lg.sup.-1 cm.sup.-1. They are film-forming, thermally- and light-stable, and solvent-coatable. These compounds are useful as coloring and light-absorbing agents, particularly as the light-absorbing agents in thin optical recording layers.Type: GrantFiled: March 11, 1985Date of Patent: October 28, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mohamed A. Elmasry
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Patent number: 4619881Abstract: A photoconductive composition is disclosed, containing at least one trisazo compound represented by the following general formula (1): ##STR1## wherein Z represents ##STR2## R.sup.6 represents a hydrogen atom, a lower alkyl group, an aryl group, an aryloxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, or a substituted group of them; As', which may be the same or different, each represents ##STR3## B.sup.1, B.sup.2 and B.sup.3 each represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or a substituted lower alkyl group or lower alkoxy group, and B.sup.1, B.sup.2 and B.sup.3 may be identical or different; X represents an atomic group necessary to form an aromatic ring or heterocyclic ring, which may be substituted or unsubstituted, by condensing with the benzene ring to which the hydroxyl group and Y are bonded; Y represents ##STR4## R.sup.1 represents an alkyl group, a phenyl group or a substituted alkyl or phenyl group; R.sup.Type: GrantFiled: February 21, 1985Date of Patent: October 28, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Seiji Horie, Hideo Sato
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Patent number: 4612271Abstract: A photosensitive composition is provided comprising at least one azo compound represented by formula (1) ##STR1## wherein A.sup.1 represents a substituted or unsubstituted carbocyclic or heterocyclic aromatic ring; X represents an atomic group forming a substituted or unsubstituted carbocyclic or heterocyclic aromatic ring upon condensation with benzene rings; Ar represents a carbocyclic or heterocyclic aromatic ring substituted by at least one perfluoroalkyl group (groups other than perfluoroalkyl group may also be present); and n represents an integer of 3, 4, 5, or 6.Type: GrantFiled: December 19, 1985Date of Patent: September 16, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Naonori Makino, Seiji Horie, Hideo Sato
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Patent number: 4606987Abstract: An electrophotographic photosensitive material has a photosensitive layer formed on an electroconductive substrate, with the photosensitive layer containing a polymeric binder and an organic photoconductor represented by the following formulaA--CH.dbd.CH).sub.n CH.dbd.NNHYwherein A is selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 14 carbon atoms, an aryl group having 6 to 20 carbon atoms and a heterocyclic residue of a 3- to 30- membered ring,wherein n is 1 or 2,Y is selected from the group consisting of --SO.sub.2 R', ##STR1## wherein R' is selected from the group consisting of an alkyl group having 1 to 12 carbon atoms, an aralkyl group having 7 to 14 carbon atoms, an aryl group having 6 to 20 carbon atoms and a heterocyclic residue of a 3- to 30- membered ring, and R.sup.2 and R.sup.3, R.sup.4 and R.sup.5, either form a ring together with the nitrogen atom to which R.sup.2 and R.sup.3, R.sup.4 and R.sup.5 are bonded and in this case R.sup.Type: GrantFiled: July 9, 1985Date of Patent: August 19, 1986Assignee: Toray Industries, Inc.Inventors: Kazuo Matsuura, Hiroki Osedo, Keisuke Ohshima
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Patent number: 4600674Abstract: Disclosed is an electrophotographic photoconductive material excellent in sensitivity and durability which comprises an electroconductive substrate and, provided thereon, a photosensitive layer containing a trisazo pigment represented by the general formula ##STR1## wherein R's, which may be the same or different, represent each a hydrogen atom, halogen atom, substituted or unsubstituted alkyl group, alkoxyl group, or nitrile group; n is an integer of 1 or 2; and A represents ##STR2## wherein Z represents a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring or a substituted or unsubstituted aromatic hetero-ring; X represents a hydrogen atom, an alkyl group, or a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring, a substituted or unsubstituted aromatic hetero ring, or a substituted or unsubstituted hetero ring; m is 0 or 1; B represents a group of atoms necessary to complete a substituted or unsubstituted aromatic carbon ring, a substType: GrantFiled: June 24, 1985Date of Patent: July 15, 1986Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuhiro Emoto, Akira Itoh
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Patent number: 4594303Abstract: An electrophotographic photoreceptor which has an electrophotographic photoreceptive layer containing as a charge generating material a particular organic compound having the general formula described hereinafter in this disclosure in a combination with a charge transporting material. The compounds improve upon the sensitivity, durability and selectivity to photosensitive wavelengths of photoreceptors. Furthermore, the photoreceptors can be easily manufactured.Type: GrantFiled: August 28, 1985Date of Patent: June 10, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Seiji Horie, Masayoshi Nagata, Junji Nakano, Hideo Sato
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Patent number: 4594304Abstract: An electrophotographic light-sensitive material is described, comprising, provided on an electrically conductive support, a light-sensitive layer containing at least one hydrazone compound selected from particular groups of hydrazone compounds.Type: GrantFiled: March 5, 1985Date of Patent: June 10, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Shu Watarai, Seiji Horie
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Patent number: 4582771Abstract: This invention relates to a disazo compound, a method for producing said disazo compound and an electrophotographic element containing said disazo compound, said disazo compound has the general formula (I), ##STR1## wherein Y represents a substituted or non-substituted cyclic hydrocarbon or substituted or non-substituted heterocycle; R represents hydrogen, substituted or non-substituted alkyl group, or substituted or non-substituted phenyl group; and Z represents a substituted or non-substituted cyclic hydrocarbon or heterocycle fused with phenyl nucleus.Type: GrantFiled: December 28, 1984Date of Patent: April 15, 1986Assignee: Ricoh Co., Ltd.Inventor: Masafumi Ohta
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Patent number: 4567126Abstract: Photoconductive materials for electrophotography which have high sensitivity and high durability are provided by incorporating at least one hydrazone compound represented by the following general formula (I) in photoconductive layer: ##STR1## (wherein M is 0, 1, 2 or 3 and l is 1 or 2), R.sub.2 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom,R.sub.3 is a hydrogen atom, a lower alkyl group or an aryl group,R.sub.4 is a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom,R.sub.5 is an allyl group, propenyl group or ##STR2## (wherein R.sub.6 is a lower alkyl group, a lower alkoxy group or a halogen atom), and n is 0 or 1.Type: GrantFiled: November 28, 1984Date of Patent: January 28, 1986Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Kazuhiro Emoto, Kozo Haino
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Patent number: 4554231Abstract: An improved electrophotographic photosensitive member is composed of a layer containing a hydrazone compound represented by the formula ##STR1## wherein R.sub.2 and R.sub.3 are each unsubstituted alkyl or substituted alkyl, unsubstituted aralkyl or substituted aralkyl, or unsubstituted aryl or substituted aryl, with the proviso that R.sub.2 and R.sub.3 are not simultaneously alkyls, n is 1 or 2, when n is 1, A represents ##STR2## wherein R.sub.1 is C.sub.1 -C.sub.5 alkyl, unsubstituted aralkyl, or substituted aralkyl, and when n is 2, A represents a direct single bond between two ##STR3## radicals.Type: GrantFiled: December 9, 1983Date of Patent: November 19, 1985Assignees: Canon Kabushiki Kaisha, Copyer Kabushiki KaishaInventors: Shozo Ishikawa, Kiyoshi Sakai, Minoru Mabuchi, Katsunori Watanabe, Makoto Kitahara
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Patent number: 4551404Abstract: An electrophotographic photosensitive member characterized by containing at least one azo pigment represented by the following formula (1), (2), or (3): ##STR1## In these formulae; ##STR2## wherein Z represents ##STR3## in which R.sub.71 is hydrogen, or substituted or unsubstituted alkyl; n is 0 or 1; R.sub.21, R.sub.22, R.sub.61 and R.sub.62 represent hydrogen, alkyl, alkoxy, nitro, or hydroxyl R.sub.31 and R.sub.32 represent hydrogen or alkoxy; and R.sub.41, R.sub.42, R.sub.43, R.sub.44, R.sub.51, R.sub.52, R.sub.53 and R.sub.54 represent hydrogen, halogen, or organic monovalent residue. ##STR4## wherein X represents a residue necessary for completing an aromatic hydrocarbon ring or a heterocyclic ring, each ring being substituted or unsubstituted; R.sub.11 represents hydrogen or alkyl; R.sub.12 represents methyl, ethyl or C.sub.3 -C.sub.8 linear alkyl; and R.sub.17 and R.sub.18 represent alkyl, aralkyl or aryl, each substituted or unsubstituted. In formula (2), R.sub.11, R.sub.Type: GrantFiled: August 9, 1982Date of Patent: November 5, 1985Assignees: Canon Kabushiki Kaisha, Copyer Kabushiki KaishaInventors: Masaaki Hiro, Yoshio Takasu, Shozo Ishikawa, Kazuharu Katagiri, Hideyuki Takahashi
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Patent number: 4530892Abstract: The present invention relates to an electrophotographic recording material composed of an electrically conducting coating support which is suitable, in particular, for the manufacture of printing forms or printed circuits, and a photoconductive insulating coating which contains a dye, in dispersion, which is a compound according to the general formula ##STR1## in which X is an oxygen atom, or a sulfur atom, or a CO group, andA is a --CO--B--CO-- group, in whichB is an oxygen atom or a --NR.sub.1 -- group, in whichR.sub.1 is a hydrogen atom, or an alkyl, alkenyl or alkoxyalkyl group with, in each case, at least 1 to 4 carbon atoms, or is an unsubstituted or substituted pheynl or benzyl radical,R.sub.2, R.sub.3 and R.sub.4 are identical or different, and are a hydrogen atom or a halogen atom, or an alkyl or alkoxy group with, in each case, at least 1 to 4 carbon atoms, or an amino or nitro group,n is 1 to 4, p is 1 or 2, andR.sub.5 is a hydrogen atom or, together with R.sub.Type: GrantFiled: March 21, 1983Date of Patent: July 23, 1985Assignee: Hoechst AktiengesellschaftInventor: Wolfgang Wiedemann
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Patent number: 4500619Abstract: An electrophotographic photosensitive member comprises a layer containing at least one disazo pigment represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2 each represent hydrogen, halogen, lower alkyl or lower alkoxy; R.sub.3 represents methyl, ehtyl or C.sub.3 -C.sub.10 linear alkyl; and X represents a residue necessary to complete an aromatic hydrocarbon ring or heterocyclic ring, substituted or unsubstituted.Type: GrantFiled: March 22, 1984Date of Patent: February 19, 1985Assignees: Copyer Kabushiki Kaisha, Canon Kabushiki KaishaInventors: Shozo Ishikawa, Kazuharu Katagiri, Katsunori Watanabe, Kiyoshi Sakai, Makoto Kitahara
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Patent number: 4500621Abstract: Electrographic imaging process and electrographic plates utilized therein are provided wherein the photoconductive layer comprises a squaric acid methine dye admixed with a binder or a photoconductive material. The photoconductive layer may also comprise the squaric acid methine dye, a binder and a charge transport material.Type: GrantFiled: April 11, 1983Date of Patent: February 19, 1985Assignee: Ricoh Systems, Inc.Inventor: Herbert K. Wurster
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Patent number: 4495264Abstract: An electrophotographic photosensitive member and use thereof, having a photosensitive layer upon or over an electrically conductive substrate, the photosensitive layer comprising an organic photoconductive material selected from the group consisting of the following general formula (1), (2), or (3): ##STR1## wherein A represents a coupler component having aromaticity, ##STR2## wherein, A represents a coupler component having aromaticity, R represents hydrogen, halogen, alkyl, or alkoxy, and n represents an integer of 1 to 4, ##STR3## wherein, A represents a coupler component having aromaticity and R.sub.1 represents a single bond or a substituted or unsubstituted divalent hydrocarbon or heterocyclic residue.Type: GrantFiled: March 14, 1984Date of Patent: January 22, 1985Assignee: Canon Kabushiki KaishaInventors: Hideyuki Takahashi, Shozo Ishikawa
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Patent number: 4481270Abstract: An electrophotographic imaging process having a double charging sequence and a photoreceptor utilized therein are provided, wherein the photoreceptor comprises a substrate, a photosensitive layer comprising a squaric acid methine dye, and an insulating layer. The photosensitive layer may also comprise a squaric acid methine dye and a charge transport material.Type: GrantFiled: April 28, 1983Date of Patent: November 6, 1984Assignee: Ricoh Systems, Inc.Inventors: Tomio Kubota, Herbert K. Wurster
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Patent number: 4477550Abstract: An electrophotographic photoreceptor is described comprising an N-arylamino substituted hydrazone compound represented by formula (I), (II), or (III), in a light-sensitive layer thereof provided on a conductive support; formulae (I), (II), and (III) are as follows: ##STR1## wherein X represents O, S or N--R.sup.6 ; R.sup.1 and R.sup.2 each represents a non-substituted or a substituted straight or branched chain alkyl group containing from 1 to 12 carbon atoms, a non-substituted or a substituted straight or branched chain aralkyl group containing from 7 to 20 carbon atoms, or a non-substituted or a substituted aryl group, the aryl group including monovalent residues of monocyclic aromatic rings and condensed polycyclic aromatic rings having from 2 to 4 rings therein; R.sup.3, R.sup.4, R.sup.5, and R.sup.Type: GrantFiled: May 4, 1983Date of Patent: October 16, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Seiji Horie, Masayoshi Nagata, Junji Nakano, Hideo Sato
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Patent number: 4471040Abstract: An electrophotographic photosensitive member have a photosensitive layer, said photosensitive layer comprising at least one dis-azo pigment of Formula (I) or Formula (II) shown below: ##STR1## wherein Z represents an oxygen atom, a sulfur atom or >N--A.sub.2, wherein A.sub.2 is a hydrogen atom or a lower alkyl, A.sub.1 a hydrogen atom, a lower alkyl or a halogen atom; Ph.sub.1 an unsubstituted or substituted phenylene group, n an integer of 0 or 1, and B.sub.1 a coupler residue; with proviso that when n is 0, Z is an oxygen atom and A.sub.1 is a hydrogen atom, the case where Ph.sub.1 represents substituted phenyl radicals except for unsubstituted or mono-substituted phenyl radicals with a halogen atom, a lower alkyl or an alkoxy group;and ##STR2## wherein Ph.sub.2 represents an unsubstituted or substituted phenylene group and B.sub.2 a coupler residue.Type: GrantFiled: September 9, 1981Date of Patent: September 11, 1984Assignees: Canon Kabushiki Kaisha, Copyer Kabushiki KaishaInventors: Kazuharu Katagiri, Katsunori Watanabe, Shozo Ishikawa, Makoto Kitahara