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    POLYIMIDE YARN
    131.
    发明专利
    POLYIMIDE YARN 失效

    公开(公告)号：JPS63211319A

    公开(公告)日：1988-09-02

    申请号：JP4001387

    申请日：1987-02-25

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： TAMAI MASAJI ,  KAWASHIMA SABURO ,  OTA MASAHIRO ,  OIKAWA HIDEAKI ,  YAMAGUCHI TERUHIRO

    IPC: C08G73/10 ,  D01F6/74

    Abstract: PURPOSE:To obtain the titled yarn having high strength and high modulus of elasticity, obtainable by dry spinning and wet spinning method, comprising a polyimide having a specific pyromellitic imide unit as a repeating unit. CONSTITUTION:Yarn having a repeating unit shown by formula I. For example, first 4,4'-bis(3-aminophenoxy)biphenyl is reacted with pyromellitic anhydride in a solvent, preferably DMF, etc., preferably at

    POLYIMIDE AND HEAT-RESISTANT ADHESIVE COMPRISING SAME
    132.
    发明专利
    POLYIMIDE AND HEAT-RESISTANT ADHESIVE COMPRISING SAME 失效

    公开(公告)号：JPS62185714A

    公开(公告)日：1987-08-14

    申请号：JP2693686

    申请日：1986-02-12

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： OIKAWA HIDEAKI ,  OOTA MASAHIRO ,  KAWASHIMA SABURO ,  TAMAI MASAJI ,  SONOBE YOSHIO ,  YAMAGUCHI TERUHIRO

    IPC: C08G73/00 ,  C08G73/10 ,  C09J5/06 ,  C09J179/08

    Abstract: PURPOSE:To obtain a polyimide excellent in heat resistance, processability and high-temperature adhesiveness, having specified repeating units and pyridine rings in the main chain skeleton. CONSTITUTION:A polyimide having repeating units of formula I and having a logarithmic viscosity of 0.1-3.0dl/g as measured in the form of a polyamic acid, as a precursor thereof, having repeating units of formula II. In the formulas, R is a tetravalent group selected from among a 2C or higher aliphatic group, a cycloaliphatic group, a mononuclear aromatic group, a condensed polynuclear aromatic group and a noncondensed polycuclear aromatic group composed of aromatic groups connected with each other directly or through a bridging member. Said relative viscosity is a value as determined in N,N- dimethylacetamide solvent at a concentration of 0.5g/100ml of the solvent and 35 deg.C. This polyimide can be used in a wide variety of fields such as a base material for use in aerospace and aircraft, a base material for electrical and electronic products, a heat-resistant adhesive as well as a polymeric material for medical use and a material for separatory membranes.

    2-OR 4-CHLORO-3,4'-DINITRODIPHENYL SULFONE AND PRODUCTION THEREOF
    133.
    发明专利
    2-OR 4-CHLORO-3,4'-DINITRODIPHENYL SULFONE AND PRODUCTION THEREOF 失效

    公开(公告)号：JPS61151162A

    公开(公告)日：1986-07-09

    申请号：JP27274684

    申请日：1984-12-26

    Applicant: MITSUI TOATSU CHEMICALS

    Inventor： YOSHIKAWA YUKIHIRO ,  KAWASHIMA SABURO ,  YAMAGUCHI KEISABURO ,  YAMAGUCHI TERUHIRO

    IPC: C07C315/02 ,  C07C67/00 ,  C07C313/00 ,  C07C317/14

    Abstract: NEW MATERIAL:2- Or 4-chloro-3,4'-dinitrodiphenyl sulfone shown by the formula I (substitution position of chlorine is in 2- or 4-position). USE:Useful as a raw material for producing 3,4'-diaminodiphenyl sulfone extremely useful for producing heat-resistant high polymer materials, agricultural chemicals, drugs, dye, etc. PREPARATION:2- Or 4-chloro-4'-nitrodiphenyl sulfide shown by the formula II is oxidized and nitrated with nitric acid and a mixed acid, to give a compound shown by the formula I. The reaction is carried out at 20-100 deg.C, preferably at 30-90 deg.C for about 2-12hr. This method has no problem of environmental pollution, an isolated product has high purity, requires no complicated purification process, so it is an extremely improved industrial method.

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