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公开(公告)号：JPH11292948A
公开(公告)日：1999-10-26
申请号：JP9348198
申请日：1998-04-06
Applicant: BRIDGESTONE CORP
Inventor： NAKAJIMA TADASHI , SAKATA JUNJI , KAWAGOE TAKAHIRO
Abstract: PROBLEM TO BE SOLVED: To obtain a polymeric material capable of providing an electroconductive member excellent in various characteristics without fouling an image-forming unit or a transfer material, or the like, by carrying out the chain extension and curing of a specific prepolymer with a specified polyol. SOLUTION: This polymeric material is obtained by reacting (A) a polyether polyol consisting essentially of the one having preferably 3 functional groups with (B) a polyisocyanate compound consisting essentially of preferably a diphenylmethane diisocyanate (derivative) at 10-120 deg.C for about l-150 h and then carrying out the chain extension and curing of (C) the resultant prepolymer with (D) a polyol having 500-5,000 weight-average molecular weight and terminal hydroxyl groups of primary ones (e.g. polytetramethylene ether glycol). The components A and B are preferably used in a ratio so that the amount of the component B is preferably in excess of the stoichiometric one so as to provide preferably 2-20 wt.% content of the isocyanate groups in the component C.
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公开(公告)号：JPH11140306A
公开(公告)日：1999-05-25
申请号：JP30672097
申请日：1997-11-10
Applicant: BRIDGESTONE CORP
Inventor： SAKATA JUNJI , NAKAJIMA TADASHI , KAWAGOE TAKAHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a conductive member which is less likely to cause a place- to-place variation in electric resistance and is improved in the range of variation in electric resistance according to environmental conditions and the range of variation in electric resistance caused by continuous energization. SOLUTION: This conductive member uses a conductive material comprising: (A) a polyurethane foam or an polyurethane elastomer obtd. using a polyisocyanate component, comprising an isocyanate-modified satd. aliph. or satd. alicyclic isocyanate, and a polyol component; and (B) an electrical conductivity-imparting agent comprising a quaternary ammonium salt (pref. a quaternary ammonium salt of a carboxylic acid).
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公开(公告)号：JPH09279015A
公开(公告)日：1997-10-28
申请号：JP8854196
申请日：1996-04-10
Applicant: BRIDGESTONE CORP
Inventor： NAKAJIMA TADASHI , YAKUSHIJI MANABU , MAEDA HIROKO , KAWAGOE TAKAHIRO , KIJIMA SHIGERU
Abstract: PROBLEM TO BE SOLVED: To provide a conductive member which is used in a mechanism such as an electrophotographic machine, does not increase in electrical resistance even upon the continuous application of a current and has a narrow width of a change from electric resistance in a state of low-temperature low-humidity and that in a state of high-temperature and high-humidity and to provide an electrophotographic machine using the same. SOLUTION: In this conductive member used in a mechanism such as an electrophotographic machine, the member is made of a urethane containing a polyol component comprising a polyetherpolyol composed of a random adduct of an ethylene oxide with propylene oxide and carbon black satisfying the relationships: 25 /g] is the specific surface area as measured by the nitrogen adsorption method, and Y [ml/100g] is the DBP absorption).
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公开(公告)号：JPH0895372A
公开(公告)日：1996-04-12
申请号：JP5891195
申请日：1995-03-17
Applicant: BRIDGESTONE CORP
Inventor： NAKAJIMA TADASHI , KANEDA HIROSHI , SAWA EIJI , KAWAGOE TAKAHIRO
Abstract: PURPOSE: To obtain a member having low hardness, high fracture strength and specified resistance by using a special method to produce polyurethane foam and adding a conducting agent to give conductivity to the polyurethane foam. CONSTITUTION: The polymer member is obtd. by adding and mixing a conducting agent to polyurethane foam. The obtd. member has 1×10 -10×10 Ωcm volume resistance at 22 deg.C and 55% relative humidity under 1000V measuring voltage, >=2kgf/cm fracture strength, and
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公开(公告)号：JPH0345707A
公开(公告)日：1991-02-27
申请号：JP18192289
申请日：1989-07-14
Applicant: BRIDGESTONE CORP
Inventor： NAKAJIMA TADASHI , KAWAGOE TAKAHIRO
Abstract: PURPOSE:To obtain the title fiber having an excellent electroconductivity and orientation of crystal and suitable for reinforcing material, electroconductive material, antistatic material, electrode material, electrostatic and electromagnetic shield material, flame retardant material, etc., by spinning a high polymer substance consisting essentially of a specific polyaniline (derivative). CONSTITUTION:The aimed fiber obtained by spinning a high polymer substance consisting essentially of a polyaniline (derivative) being
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Patent Agency Ranking
公开(公告)号：JPH0213842A
公开(公告)日：1990-01-18
申请号：JP16244088
申请日：1988-07-01
Applicant: BRIDGESTONE CORP
Inventor： IINO TAKAHIRO , NAKAJIMA TADASHI , KAWAGOE TAKAHIRO
IPC: G01N27/327 , G01N27/30 , H01M4/86
Abstract: PURPOSE:To obtain an enzyme electrode with a better characteristic at a low cost by building up a working pole with a metallic oxide conductor. CONSTITUTION:A metallic oxide conductor layer is formed on a nonconductive substrate made of polyethylene terephthalate or the like and further is modified with an electron transmission substance (mediator) and an enzyme to obtain a mediator type enzyme electrode. The metallic oxides herein used are preferably tin oxide, indium oxide, zinc oxide, indium tin oxide, tungsten oxide or titanium oxide and viewed from electrochemical stability, the indium tin oxide is the most preferable. The mediator therein used is preferably a conductive polymer substance such as polyaniline or reducing type redox compound such as phenothiazines and phenoxazines. The enzyme herein used includes glucose oxidase and alcohol dehydrogenase, but not specifically limited to them.
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公开(公告)号：JPH026734A
公开(公告)日：1990-01-10
申请号：JP15591588
申请日：1988-06-23
Applicant: BRIDGESTONE CORP
Inventor： NAKAJIMA TADASHI , IINO TAKAHIRO , KAWAGOE TAKAHIRO
IPC: G01N27/333 , G01N27/30
Abstract: PURPOSE:To miniaturize an instrument by using specific polyaniline to constitute a high-polymer qualified electrodes. CONSTITUTION:This element is constituted by electrically connecting plural pieces of the collecting electrodes 4 and 4 which consist of a conductor and are parted from each other by the polyaniline with which the sum of the part having a dope=semiquinone radical state and the part having a quinone-diimine state is 10-60mol% and the sum of the part having a benzonoid-amine state and the part having a benzonoid=ammonium salt state is 90-40mol%. The pH can be well measured by detecting the current value between the collecting electrodes 4 and 4 which changes in accordance with a change in the conductivity of the polyaniline 5 by a change in the ambient pH when a voltage is impressed between the electrodes 4 and 4 connected by the polyaniline 5. The need for a reference electrode is eliminated in this way and the instrument is miniaturized.
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公开(公告)号：JPS62176048A
公开(公告)日：1987-08-01
申请号：JP3824586
申请日：1986-02-25
Applicant: BRIDGESTONE CORP
Inventor： MIYAZAKI TADAAKI , SUZUKI KINYA , TOYOSAWA SHINICHI , KITAMURA TAKASHI , NAKAJIMA TADASHI , KAWAGOE TAKAHIRO
Abstract: PURPOSE:To increase coulomb efficiency and to improve cycle performance to increase cycle life by using an Al-In alloy as a negative material. CONSTITUTION:An Al-In alloy is used in a negative electrode. This negative electrode is combined with a positive electrode which is rechargeable and a nonaqueous electrolyte containing an alkali metal ion to amnufacture a secon dary battery. Thereby, the negative electrode has coulomb efficiency near a theroretical value and the cycle performance is improved to sufficiency display the capabiltiy of various types of positive electrodes, and a drop in performance caused by the negative electrode is eliminated to increase the cycle life even in the repeating of high capacity charge-discharge.
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公开(公告)号：JPS62176047A
公开(公告)日：1987-08-01
申请号：JP1661986
申请日：1986-01-28
Applicant: BRIDGESTONE CORP
Inventor： KITAMURA TAKASHI , MIYAZAKI TADAAKI , NAKAJIMA TADASHI , SUZUKI KINYA , TOYOSAWA SHINICHI , KAWAGOE TAKAHIRO
Abstract: PURPOSE:To increase coulomb efficiency and to improve cycle performance to increase cycle file by using an Al-Bi alloy as a negative material. CONSTITUTION:An Al-Bi alloy or a ternary system alloy of Al-Bi alkali metal is used in a negative electrode. This negative electrode is combined with a positive electrode, which is rechargeable, and an electrolyte containing an alkali metal ion. Thereby, coulomb efficiency is increased and the cycle performance is improved to sufficiently display the capability of various types of positive electrodes, and a drop in performance caused by the negative electrode is eliminated to increase the cycle life even in the repeating of high capacity change- discharge.
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公开(公告)号：JPS6279229A
公开(公告)日：1987-04-11
申请号：JP21888385
申请日：1985-10-01
Applicant: BRIDGESTONE CORP
Inventor： SUZUKI KINYA , TOYOSAWA SHINICHI , NAKAJIMA TADASHI , MIYAZAKI TADAAKI , KITAMURA TAKASHI , KAWAGOE TAKAHIRO
Abstract: PURPOSE:To obtain the titled material having uniform film thickness and excellent film-forming property while preventing the influence of gas generating from a cathode, by horizontally disposing an anode and a cathode in parallel in an electrolyte placing the anode under the cathode and carrying out the electrolytic oxidation. CONSTITUTION:An anode 3 and a cathode 4 are horizontally disposed in an electrolyte 2 charged in a electrolytic chamber 1 and the anode 3 is positioned under the cathode 4. Electric current is passed through the electrolyte using the assembly to effect the electrolytic oxidation of a monomer such as aniline contained in the electrolyte 2. A polymeric film of an organic polymeric material is deposited on the surface of the anode 3 by this process. The form of the cathode is preferably the one to enable the passage of gas, e.g. a mesh, and preferably vibration is applied to the cathode to accelerate the release of the generated gas. The size of the cathode is preferably equal to or larger than the anode. The electrolysis is carried out preferably by separating the electrodes from each other at an electrolyte temperature of -5-+20 deg.C and an anodic current density of without agitation.
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