公开(公告)号：JP2000206777A

公开(公告)日：2000-07-28

申请号：JP842599

申请日：1999-01-14

Applicant: BRIDGESTONE CORP

Inventor： TAKAGI MITSUHARU ,  OKADA TOKUO ,  ARAI TOSHIAKI ,  KAWAGOE TAKAHIRO ,  KITAMURA TAKASHI

IPC: G03G15/08

Abstract: PROBLEM TO BE SOLVED: To provide a toner carrier capable of excellently coping with a color image and obtaining a high-quality image by preventing image defect such as spots and irregular density and further white image fogging from occurring as far as possible. SOLUTION: As for this toner carrier, an electric resistance value at the time of applying 100 V is 104 to 1010 Ω and the maximum value of surface potential after 0.35 seconds in the case of electrifying the surface of the toner carrier by applying 8 kV voltage to a corona discharger arranged at the distance of 1 mm from the surface thereof, so that corona discharge may be generated is

公开(公告)号：JPH1144993A

公开(公告)日：1999-02-16

申请号：JP20147197

申请日：1997-07-28

Applicant: BRIDGESTONE CORP

Inventor： TAKIZAWA YOSHIO ,  TAKAGI MITSUHARU ,  OKADA TOKUO ,  ARAI TOSHIAKI ,  KAWAGOE TAKAHIRO ,  KITAMURA TAKASHI

IPC: G03G15/08 ,  F16C13/00

Abstract: PROBLEM TO BE SOLVED: To obtain a toner carrier capable of forming a high-quality image where a black horizontal line or a white horizontal line is not caused, that is, which has no irregularity by incorporating a crosslinked resin on the surface of a conductive elastic layer and forming a surface layer whose solvent insolubility rate to a specified resin component is equal to or above a specified value. SOLUTION: As for this toner carrier 1, the surface layer 4 principally incorporating a crosslinked resin is provided on the surface of the conductive elastic layer 3 in order to control electrifying property and adhesive property for toner or in order to prevent the decrease of frictional force between a photoreceptor and a laminated blade and the soiling of the photoreceptor by an elastic body. The solvent insolubility rate of the resin component of the surface layer 4, which is expressed by solvent insolubility rate (%)=(B/A)×100, in >=70%, provided that A shows the weight of the resin component in the surface layer 4 before it is immersed in the solvent and B shows the weight of the resin component in the surface layer 4 after it is immersed in good solvent for 24 hours at 25 deg.C to the resin component before cross-linking treatment.

公开(公告)号：JPH1124441A

公开(公告)日：1999-01-29

申请号：JP12817098

申请日：1998-04-22

Applicant: BRIDGESTONE CORP

Inventor： NIWA HIDEYUKI ,  KAGA NORIHIKO ,  MAEDA HIROKO ,  YAMADA TSUTOMU ,  KAWAGOE TAKAHIRO ,  KITAMURA TAKASHI

IPC: B41L3/00 ,  B32B7/02 ,  B32B25/14 ,  F16C13/00 ,  G03G15/16

Abstract: PROBLEM TO BE SOLVED: To surely evaluate toner holding power without requiring the test of an actual machine and to surely obtain the excellent toner holding power by laminating an elastic layer and a coating film layer and specifying relation between the dielectric constant of the elastic layer and the volume resistivity of the coating film layer. SOLUTION: An OA apparatus member such as an intermediate transfer member is constituted by using a laminated body provided with an elastic layer 11 constituting of one or more than two plural layers and a coating film layer 12 consisting of one or more than two layers. In this case, when the dielectric constant of the layer 11 is defined as (εb) and the volume receptivity of the layer 12 is defined as (ρvs), two conditions of (1) 0

公开(公告)号：JPH0987426A

公开(公告)日：1997-03-31

申请号：JP24190495

申请日：1995-09-20

Applicant: BRIDGESTONE CORP

Inventor： TOBA TADASHI ,  SHIMIZU TAKASHI ,  KITAMURA TAKASHI

IPC: C08K3/36 ,  B60C1/00 ,  B60C15/06 ,  C08C19/25 ,  C08C19/44 ,  C08F8/42 ,  C08F36/00 ,  C08F36/04 ,  C08K3/00 ,  C08L9/00 ,  C08L19/00

Abstract: PROBLEM TO BE SOLVED: To obtain a rubber composition having extremely low hysteresis loss and satisfiably balanced breaking characteristics, abrasion resistance, etc., by modifying a conjugated diene (co)polymer with a specific silane modifying agent and mixing with silica. SOLUTION: The objective rubber composition is produced by polymerizing a conjugated diene monomer (preferably 1,3-butadiene or isoprene) or a conjugated diene monomer and a vinyl aromatic hydrocarbon monomer (preferably styrene) in the presence of an organic lithium-based initiator (e.g. n-butyllinium), modifying the polymerization activity terminal of the obtained (co)polymer with a modifying agent reactive with silica surface and expressed by the formula (R is a substituent having epoxy or an unsaturated carbonyl group; X is an alkyl or a halogen; R is a 1-20C aliphatic, alicyclic or aromatic hydrocarbon group; (m) and (n) are each 1-3; m+n is 2-4) (preferably γ-glycidoxypropyl trimethoxysilane) and finally mixing the obtained terminal-modified (co)polymer with a silica (preferably silica prepared by wet-process) in an organic solvent.

公开(公告)号：JPH08225604A

公开(公告)日：1996-09-03

申请号：JP34846495

申请日：1995-12-18

Applicant: BRIDGESTONE CORP

Inventor： KITAMURA TAKASHI ,  DEIBITSUDO EFU ROOSON ,  MORITA KOICHI ,  OZAWA YOICHI

IPC: C08F4/48 ,  B60C1/00 ,  C08F4/00 ,  C08F4/08 ,  C08F4/42 ,  C08F36/04 ,  C08F236/10 ,  C08K3/04 ,  C08L21/00

Abstract: PURPOSE: To obtain a hydrocarbon-soluble anionic polymerization initiator which can polymerize monomers to give a polymer improved in hysteresis, tear strength and abrasion resistance by mixing a lithioamine with an organic alkali metal compound. CONSTITUTION: The polymerization initiator containing a mixture comprising a lithioamine (i) represented by formula I, an organic alkali metal compound (ii) and optionally a chelating agent (iii). In the formulas, y is 0 or about 0.5 to about 3; SOL is a hydrocarbon group, an ether group or an amine group; A is a dialkyl-, alkyl-, cycloalkyl- or dicycloalkylamine group represented by formula II or a cyclic amine group represented by formula III (wherein R1 is a 1-12C alkyl, cycloalky or aralkyl; and R2 is a bivalent alkylene, bicycloalkane, substituted alkylene, oxy- or N-alkylaminoalkylene each of which has about 3 to about 16 methylene groups.

公开(公告)号：JPH06199923A

公开(公告)日：1994-07-19

申请号：JP28215793

申请日：1993-10-18

Applicant: BRIDGESTONE CORP

Inventor： KITAMURA TAKASHI ,  DEIBITSUDO EFU ROOSON ,  MORITA KOICHI ,  OZAWA YOICHI

IPC: C08K3/04 ,  B60C1/00 ,  C08F4/00 ,  C08F4/42 ,  C08F4/48 ,  C08F36/04 ,  C08F236/10 ,  C08L21/00

Abstract: PURPOSE:To obtain the subject initiator useful for producing a diene (co) polymer, soluble in a hydrocarbon, providing a polymer having a narrow molecular weight in good reproducibility, comprising a mixture of a specific lithioamine and an organic alkali metal compound. CONSTITUTION:The objective initiator comprises a mixture of a lithioamine of the formula (A)Li(SOL)y [y is 0 or 0.5-3; SOL is soluble component selected from hydrocarbon, ethers, etc. ; A is (di)alkyl or (di)cycloalkylamine group of formula I (R1 is 1-12C alkyl, cycloalkyl, etc.) or cyclic amine group of formula II (R2 is 3-12 methylene-containing bifunctional alkylene, oxyalkylene, etc.), an organic alkali metal compound and optionally a chelating agent. The lithioamine is preferably obtained by reacting a functioning agent composed of an amine containing a group of formula I or formula II with an organolithium compound of the formula RLi (R is 1-20C alkyl, alkenyl, etc.) in the presence of a SOL such as hexane.

公开(公告)号：JPH0411501A

公开(公告)日：1992-01-16

申请号：JP11065290

申请日：1990-04-27

Applicant: BRIDGESTONE CORP

Inventor： OSHIMA NOBUMITSU ,  KITAMURA TAKASHI ,  FUJIO RYOTA ,  MATSUO KENJI

IPC: B60C1/00 ,  B60C11/00 ,  C08C19/28 ,  C08F8/00 ,  C08F279/00 ,  C08F279/02 ,  C08L13/00

Abstract: PURPOSE:To improve the heat resistance of the above performance pneumatic tire by arranging rubber composition, which mainly contains denaturation conjugate diene polymer with alpha, beta unsaturated carboxylic acid, shown as an usual formula, added to conjugate diene polymer by specified wt%, for the tread. CONSTITUTION:Rubber composition, which contains as main component alpha, betaunsaturated carboxylic acid, shown as Formula I (R1-R3 show hydrogen atom, halogen atom or alkyl group with the number of carbons being 5 or less, alkenyl group or allyl group or substituted alkyl group, or alkenyl group or allyl group, mutually and independently), e.g., at least one type of denaturation conjugate diene polymer with 0.1-5.0wt% acrylic acid added to conjugate diene polymer such as 1,4-polybutadiene, is arranged for a tread. In this way, heat resistance is improved.

公开(公告)号：JPH02267871A

公开(公告)日：1990-11-01

申请号：JP8831989

申请日：1989-04-06

Applicant: BRIDGESTONE CORP

Inventor： KITAMURA TAKASHI ,  MIYAZAKI TADAAKI ,  OGINO TAKAO ,  KAWAGOE TAKAHIRO

IPC: H01M4/485 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/26

Abstract: PURPOSE:To increase the cycle life of a nonaqueous electrolyte secondary cell by using a substance shown as Li1+xV3O8 (-0.3

公开(公告)号：JPS6346223A

公开(公告)日：1988-02-27

申请号：JP18937386

申请日：1986-08-12

Applicant: BRIDGESTONE CORP

Inventor： NAKAJIMA TADASHI ,  TOYOSAWA SHINICHI ,  SUZUKI KINYA ,  KITAMURA TAKASHI ,  MIYAZAKI TADAAKI ,  KAWAGOE TAKAHIRO

IPC: C08G73/00

Abstract: PURPOSE:To provide a polyaniline having a specific X-ray diffraction pattern, capable of increasing discharge capacity when used as an electrode material of (photo)cell, etc., and suitable as an electronic material. CONSTITUTION:The objective polyaniline has an X-ray diffraction peak between 19 deg. and 20.5 deg. of 2theta measured by CuKalpha X-ray diffraction analysis. The polyaniline can be produced e.g. by carrying out electrolytic oxidation of aniline in an electrolytic polymerization liquid using a fluoroboric acid and subjecting the polyaniline obtained by the electrolytic oxidation successively to electrochemical reduction treatment by electrolyzing in a solution of e.g. fluoroboric acid using a polyaniline as a cathode, a chemical reduction treatment such as immersion in an aqueous solution of hydrazine and treatment with an alcohol.

公开(公告)号：JPS6310628A

公开(公告)日：1988-01-18

申请号：JP14883786

申请日：1986-06-24

Applicant: BRIDGESTONE CORP

Inventor： NAKAJIMA TADASHI ,  SUZUKI KINYA ,  TOYOSAWA SHINICHI ,  MIYAZAKI TADAAKI ,  KITAMURA TAKASHI ,  KAWAGOE TAKAHIRO

IPC: C08G73/00

Abstract: PURPOSE:To obtain polyaniline controlled in the formation of by-products otherwise produced during the course of production, especially, the formation of benzidine condidered to be harmful, by electrolytically polymerizing aniline while controlling the polymerization solution to a specifiec temperature or below. CONSTITUTION:In the production of polyaniline by electrolytically polymerizing aniline, said polymerization is performed while the temperature of the electrolytic polymerization solution containing aniline is being controlled to 15 deg.C or below, If the temperature of the solution is above 15 deg.C, the benzidine concentration of the solution after electrolytic polymerization is markedly increased, so that care for safety and hygienics must be paid in handling the solution in, for example, waste liquor disposal. The lower limit of this temperature is the solidifying point of the solution. this solidifying point varies with chiefly its composition, so that it can not be specified unconditionally. For example, the solidifying point of an electrolytic polymerization solution having an aniline concenteration of 1mol/l and an acid (borofluoric acid) concentration of 2mol/l is about -10 deg.C.