1,1' Biphenyl 4,4' Diamine (e.g., Benzidine, Etc.) Patents (Class 430/58.8)
-
Publication number: 20030113646Abstract: An imaging method utilizing an imaging member containing a supporting substrate, a layer of a charge carrier injecting surface, a hole blocking layer, an optional adhesive layer, a layer of a charge carrier transport material, a layer of an charge carrier generating material, an optional charge trapping layer, a crossed linked silicone rubber, and an electrically insulating overcoating layer. The member is first charged with electrostatic charges of a first polarity, charged a second time with electrostatic charges of a polarity opposite to said first polarity in order to substantially neutralize the charges residing on the electrically insulating surface of the member and exposed to an imagewise pattern of activating electromagnetic radiation whereby an electrostatic latent image is formed. The electrostatic latent image may be developed to form a visible image which may be transferred to a receiver member. The imaging member may be reused after erasure and cleaning.Type: ApplicationFiled: December 14, 2001Publication date: June 19, 2003Applicant: Xerox CorporationInventors: Merlin E. Scharfe, Richard L. Schank, William W. Limburg, Damodar M. Pai, Dale S. Renfer, John F. Yanus, Paul J. DeFeo
-
Publication number: 20030064308Abstract: The present invention intends to provide a TPD derivative being excellent in electric properties as a compound due to its extremely less content of impurities (TPD analogues) as well as being excellent in film-forming property due to its low crystallinity.Type: ApplicationFiled: September 19, 2002Publication date: April 3, 2003Inventors: Yoshio Kita, Yasuhiro Yamasaki
-
Patent number: 6495300Abstract: A photoconductive imaging member containing an optional supporting substrate, a photogenerating layer, a charge transport layer, and an overcoating layer comprised of a crosslinked composite polysiloxane-silica generated from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) in the presence of silica particles and water wherein A, B, D, and F represent the segments of the polymer backbone; E is a hole transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d each represent mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to about 1; R is alkyl, substituted alkyl, aryl, or substituted aryl, and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halide, cyano, and amino, subject to the provision that two of R1, R2, and R3 are each independently selected from thType: GrantFiled: July 2, 2001Date of Patent: December 17, 2002Assignee: Xerox CorporationInventors: Yu Qi, Beng S. Ong, Cheng-Kuo Hsiao, Ping Liu, Huoy-Jen Yuh, John S. Chambers, Helen R. Cherniack
-
Patent number: 6465142Abstract: Poly(vinyl butyral) compounds of Formula 1 where R1 is alkyl, dialkyl ether, alkyl carbonyl, cycloalkyl, cycloalkyl alkyl, aryl, aryl carbonyl, alkaryl carbonyl, aralkyl, or alkyl aralkyl; Z is —OH or —NHR2, where R2 is independently alkyl, dialkyl ether, alkyl carbonyl, cycloalkyl, cycloalkyl alkyl, aryl, aryl carbonyl, alkaryl carbonyl, aralkyl, alkyl, aralkyl or R2 is H. x is 60 to 95 mol %, y is 3 to 40 mol %, z is 0 to 20 mol %; and x+y+z is 100 mol %, a process for preparing compounds of Formula I, an intermediate in the synthesis of compounds of Formula I, and a photoconductor for electrophotography containing a compound of Formula I as a binder in the charge generation layer are described.Type: GrantFiled: November 20, 1997Date of Patent: October 15, 2002Assignee: Hewlett-Packard CompanyInventors: Khe C. Nguyen, Sivapackia Ganapathiappan
-
Patent number: 6432597Abstract: 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: GrantFiled: December 8, 2000Date of Patent: August 13, 2002Assignee: Lexmark International, Inc.Inventors: Gregory Walter Haggquist, Ronald Harold Levin, Weimei Luo, Scott Thomas Mosier
-
Publication number: 20020051918Abstract: The invention relates to an electrophotosensitive material comprising an organic photosensitive layer and an inorganic surface protective layer, wherein at least an outermost part of the organic photosensitive layer contains a diphenylamine compound represented by a formula (1): 1Type: ApplicationFiled: July 24, 2001Publication date: May 2, 2002Inventors: Eiichi Miyamoto, Yoshio Inagaki, Hideaki Fukunaga
-
Electrophotographic imaging member having two charge transport layers for limiting toner consumption
Patent number: 6379853Abstract: An electrophotographic imaging member including a supporting substrate, an optional charge blocking layer, an optional adhesive layer, a charge generating layer, and a charge transporting element including two sequentially deposited charge transport layers each including a hole transport material and an optional film forming binder. A first charge transport layer exhibits a first charge carrier transit time and second charge transport layer exhibits a second charge carrier transit time. The two charge transport layers are formed in one of two ways. First, each layer can be formed from a different charge transport material so that the charge mobility of the charge transport material of the first charge transport layer is about 4 to about 20 times lower than the charge mobility of the charge transport material of the second charge transport layer. Or, alternatively, each charge transport layer can be made using a different amount of the same charge transport material.Type: GrantFiled: November 28, 2000Date of Patent: April 30, 2002Assignee: Xerox CorporationInventors: Liang-bih Lin, Cindy C. Chen, Richard H. Nealey, Harold F. Hammond, Robert W. Nolley, Kenny-Tuan T. Dinh -
Publication number: 20020048710Abstract: An electrophotographic photosensitive member includes a charge generating material and a charge transfer material.Type: ApplicationFiled: April 12, 2001Publication date: April 25, 2002Inventors: Takakazu Tanaka, Mitsuhiro Kunieda, Yuka Nakajima, Harunobu Ohgaki
-
Patent number: 6376141Abstract: An electrophotographic imaging member with a charge generation section having separate layers of benzimidazole perylene photoconductive pigment and hydroxygallium ptalocyanine photoconductive pigment.Type: GrantFiled: April 13, 2001Date of Patent: April 23, 2002Assignee: Xerox CorporationInventors: Satchidanand Mishra, Anthony M. Horgan, Kathleen M. Carmichael, Steven P Nonkes
-
Publication number: 20020045115Abstract: A photoconductor includes a charge transport layer coated over a charge generator layer. A hole transport molecule is intentionally added to the charge generator layer preventing migration of hole transport molecules from the charge transport layer to the charge generator layer.Type: ApplicationFiled: August 24, 2001Publication date: April 18, 2002Applicant: Xerox CorporationInventors: Kathleen M. Carmichael, Anthony M. Horgan, Satchidanand Mishra
-
Patent number: 6331370Abstract: An imaging member includes a charge generation layer and a contiguous charge transport layer containing a diamine and a compound within the scope of formula (II): wherein each R1 and R2 is independently one of an alkyl having 1 to 8 carbon atoms, aryl, alkaryl and aralkyl, where the aryl is a phenyl group or a condensed ring group, and where the alkyl group of the alkaryl and aralkyl has 1 to 4 carbon atoms, R3 and R4 are independently hydrogen or CH3, and R5 is one of an alkyl having 1 to 8 carbon atoms, aryl, alkaryl and aralkyl as defined above, or a disubstituted aminophenyl group wherein each substituent is independently one of an alkyl having 1 to 8 carbon atoms, aryl, alkaryl and aralkyl as defined above. A electrophotographic system includes a cleaning blade and the above imaging member drum.Type: GrantFiled: June 7, 1995Date of Patent: December 18, 2001Assignee: Xerox CorporationInventors: Richard L. Schank, William W. Limburg, Dale S. Renfer
-
Publication number: 20010049067Abstract: A high-sensitivity and long-life electrophotographic photoreceptor comprising an electroconductive substrate and at least a photosensitive layer on the electroconductive substrate is provided, wherein the photosensitive layer contains a polyarylate resin not having a nitrogen atom in its repeating unit, and the Hall mobility at an electric field strength of 3×105 (V/cm) and at a temperature of 21° C. of the photosensitive layer is 3×10−6 (cm2/Vs) or more.Type: ApplicationFiled: December 19, 2000Publication date: December 6, 2001Inventors: Teruyuki Mitsumori, Akiteru Fujii, Mamoru Nozomi, Satoshi Kato, Yuuta Kumano
-
Patent number: 6309785Abstract: A photoconductive imaging member includes a photogenerating layer and a charge transport layer, wherein the charge transport layer contains charge transport components and a poly(imide-carbonate) binder of general structure (I) or general structure(II): where A, B, and E are divalent linkages; D is a trivalent linkage in (I) and a tetravalent linkage in (II); and x and y are the mole fractions of the repeating units such that x+y is equal to 1. The poly(imide carbonates)s can be made by interfacial polycondensation of bischloroformate, bis(imidephenol) and bisphenol.Type: GrantFiled: October 30, 2000Date of Patent: October 30, 2001Assignee: Xerox CorporationInventors: Yu Qi, Beng S. Ong, Ping Liu, C. Geoffrey Allen
-
Patent number: 6294300Abstract: A photoconductor includes a charge transport layer coated over a charge generator layer. A hole transport molecule is intentionally added to the charge generator layer preventing migration of hole transport molecules from the charge transport layer to the charge generator layer.Type: GrantFiled: January 19, 2000Date of Patent: September 25, 2001Assignee: Xerox CorporationInventors: Kathleen M. Carmichael, Anthony M. Horgan, Satchidanand Mishra, Donald P. Sullivan
-
Patent number: 6287737Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a crosslinked polymer derived from the reaction of a silyl-functionalized hydroxyalkyl polymer of Formula (I) with an organosilane of Formula (II) and water wherein A, B, D, and F represent the segments of the polymer backbone; E is an electron transporting moiety; X is selected from the group consisting of halide, cyano, alkoxy, acyloxy, and aryloxy; a, b, c, and d are mole fractions of the repeating monomer units such that the sum of a+b+c+d is equal to 1; R is alkyl, substituted alkyl, aryl, or substituted aryl; and R1, R2, and R3 are independently selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, acyloxy, halogen, cyano, and amino, subject to the provision that two of R1, R2, and R3 are independently selected from the group consisting of alkoxy, arylType: GrantFiled: May 30, 2000Date of Patent: September 11, 2001Assignee: Xerox CorporationInventors: Beng S. Ong, Ping Liu, Cheng-Kuo Hsiao, Huoy-Jen Yuh, John S. Chambers, Damodar M. Pai, Markus R. Silvestri, Kathleen M. Carmichael
-
Patent number: 6245471Abstract: Charge generation layers for photoconductors comprise a charge generation compound and at least one titanate which improves at least one electrical characteristic of a photoconductor in which the charge generation layer is included. Photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer.Type: GrantFiled: April 12, 2000Date of Patent: June 12, 2001Assignee: Lexmark International, Inc.Inventors: Ronald Harold Levin, Scott Thomas Mosier
-
Patent number: 6242144Abstract: An electrophotographic imaging member including a substrate, a charge generating layer, and a charge transport layer including a hole transport host material, a trace amount of a shallow trap dopant having a shallow trap electrochemical oxidation potential between about 0.02 volt and about 1.5 volts lower than that of the hole transport host and a film forming binder.Type: GrantFiled: September 11, 2000Date of Patent: June 5, 2001Assignee: Xerox CorporationInventors: Liang-Bih Lin, Markus R. Silvestri, John F. Yanus, Richard H. Nealey, Harold F. Hammond, Cindy C. Chen, Kenny-tuan T. Dinh, James M. Markovics
-
Patent number: 6214504Abstract: A photoconductive imaging member containing a photogenerator layer comprised of a mixture of bis(methylbenzimidazo)perinone, optionally an (alkylimido)perylene, such as (n-pentylimido)perylene or mixtures of (n-pentylimido)perylene, bisbenzimidazo(2,1-a-1′,2′-b)anthra(2,1,9-def:6,5,10-d′e′f′)diisoquinoline-6,11-dione and bisbenzimidazo(2,1-a:2′,1′-a)anthra(2,1,9-def:6,5,10-d′e′f′)diisoquinoline-10,21-dione, and a charge transport layer.Type: GrantFiled: June 27, 2000Date of Patent: April 10, 2001Assignee: Xerox CorporationInventors: Mohammad Esteghamatian, Ah-Mee Hor, James M. Duff, C. Geoffrey Allen, Dasarao K. Murti
-
Patent number: 6214502Abstract: Charge generation layers comprise a charge generation compound and a binder which comprises polyvinylbutyral and phenolic resol. Dual layer photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer, in which the charge generation layer comprises a charge generation compound and a binder which comprises polyvinylbutyral and phenolic resol. Dual layer photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer, in which the charge generation layer comprises a charge generation compound and a binder which comprises polyvinylbutyral and a resin selected from the group consisting of phenol novolac and polyhydroxystyrene.Type: GrantFiled: March 28, 2000Date of Patent: April 10, 2001Assignee: Lexmark International, Inc.Inventors: Kasturei Rangan Srinivasan, Ronald Harold Levin, Garry D. Hinch, Gregory Walter Haggquist
-
Patent number: 6207334Abstract: An electrophotographic imaging member including a substrate, a charge generating layer, a charge transport layer, and an overcoat layer including a polyvinyl butyral film forming binder, a cross linked polyamide film forming binder, and a hole transport material. A process for forming an overcoated imaging member is also disclosed.Type: GrantFiled: May 12, 2000Date of Patent: March 27, 2001Assignee: Xerox CorporationInventors: Kenny-tuan T. Dinh, Timothy J. Fuller, Markus R. Silvestri, Paul J. Defeo, Damodar M. Pai, John F. Yanus, Robert W. Nolley
-
Patent number: 6194110Abstract: A photoconductive imaging member containing a photogenerating layer comprised of a mixture of perylenes, wherein the mixture comprises, for example, (1) 1,3-bis(n-pentylimidoperyleneimido) propane (Formula A), 1,3-bis(2-methylbutylimido peryleneimido)propane (Formula B) and 1-(n-pentylimidoperyleneimido)-3-(2-methylbutylimidoperyleneimido)-propane (Formula C), and (2) an electron acceptor component Formula A 1,3-bis(n-pentylimidoperyleneimido)propane Formula B 1,3-bis(2-methylbutylimidoperyleneimido)propane Formula C 1-(n-pentylimidoperyleneimido)-3-(2-methylbutylimidoperyleneimido)propaneType: GrantFiled: July 13, 2000Date of Patent: February 27, 2001Assignee: Xerox CorporationInventors: Cheng-Kuo Hsiao, Ah-Mee Hor, Giuseppa Baranyi, H. Bruce Goodbrand