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    PRODUCTION OF LIQUID-CRYSTAL POLYESTER
    11.
    发明专利
    PRODUCTION OF LIQUID-CRYSTAL POLYESTER 失效

    公开(公告)号：JPH107781A

    公开(公告)日：1998-01-13

    申请号：JP16477096

    申请日：1996-06-25

    Applicant: TORAY INDUSTRIES

    Inventor： ICHIKAWA YASUNORI ,  SUEYOSHI TADAHIRO ,  KISHIMOTO AKIHIKO

    IPC: C08G63/60 ,  C08G63/78

    Abstract: PROBLEM TO BE SOLVED: To provide a process in which the interval of reactor cleaning can be prolonged and by which a high-quality liquid-crystal polyester having excellent heat resistance is produced and improved productivity is attained. SOLUTION: The process comprises condensation-polymerizing the feedstock therefor under stirring at a given temp. using a polymerizer having feedstock inlets, a stirrer, and a temp. controller. During the reaction, the temps. of at least those parts of the wall of the polymerizer which are located on the surface of the liquid phase and located above and near the surface are regulated to 70-200 deg.C. Alternatively, a distillate resulting from the reaction is continuously sprayed over that part of the polymerizer wall which is in contact with the gas phase inside the polymerizer and over that part of the stirrer shaft which is in contact with the gas phase, whereby the polymerizer wall and the shaft are kept clean in conducting the polycondensation.

    PRODUCTION OF N-PHENYLMALEIMIDE
    12.
    发明专利
    PRODUCTION OF N-PHENYLMALEIMIDE 失效

    公开(公告)号：JPS60112758A

    公开(公告)日：1985-06-19

    申请号：JP21948583

    申请日：1983-11-24

    Applicant: TORAY INDUSTRIES

    Inventor： KADOI AKIRA ,  SUEYOSHI TADAHIRO ,  AYA TOSHIHIKO

    IPC: C07D207/448 ,  C07D207/452

    Abstract: PURPOSE:To obtain the titled compound in high purity and yield, by reacting an aniline having no phenolic hydroxyl group with a maleic anhydride in the presence of a phosphorus oxide in a specific solvent at a specific temperature, and distilling and recovering directly the solvent and then the product. CONSTITUTION:A compound of the formula (R1-R5 are H, halogen, 1-6C alkyl, phenyl, 1-6C alkyl ether, phenoxy, COOH or NO2) is reacted with a maleic anhydride or a derivative thereof in the presence of a phosphorus oxide, e.g. phosphorus pentoxide, (dehydration and imide ring closing agent) in a solvent, e.g. a nitrogen-containing aprotic polar solvent such as N,N-dimethylformamide. capable of dissolving the above-mentioned oxide and the aimed compound N-phenylmaleimide, at 80-200 deg.C temperature, and the solvent and then the aimed compound are recovered directly by distillation to give the aimed N- phenylmaleimide useful as a raw material for heat-resistant polymers, etc.

    PRODUCTION OF LIQUID CRYSTAL POLYESTER
    13.
    发明专利
    PRODUCTION OF LIQUID CRYSTAL POLYESTER 失效

    公开(公告)号：JPH1017659A

    公开(公告)日：1998-01-20

    申请号：JP17691696

    申请日：1996-07-05

    Applicant: TORAY INDUSTRIES

    Inventor： TOGASHI OSAMU ,  SUEYOSHI TADAHIRO ,  KISHIMOTO AKIHIKO

    IPC: C08G63/181 ,  C08G63/78

    Abstract: PROBLEM TO BE SOLVED: To provide a process whereby the cycle of washing the inside of a reactor for the production of a liquid crystal polyester can be prolonged, the productivity can be therefore improved, and a high-quality polyester having excellent heat resistance can be produced. SOLUTION: This process comprises reacting a liquid-crystal-polyester-forming material containing polyester polymer pellets prepared by condensing an aromatic dicarboxylic acid with an alkylene glycol and having a logarithmic viscosity of 0.8dl/g or below and a particle diameter of 2,000μm or below. In this process, the reaction mixture is agitated so that the shear rate may be 150-1,000 (1/sec).

    AQUEOUS DISPERSION OF POLYESTER
    15.
    发明专利
    AQUEOUS DISPERSION OF POLYESTER 失效

    公开(公告)号：JPS5599950A

    公开(公告)日：1980-07-30

    申请号：JP610179

    申请日：1979-01-24

    Applicant: TORAY INDUSTRIES

    Inventor： TANAKA CHIAKI ,  FURUTA YOUKO ,  SUEYOSHI TADAHIRO

    IPC: C08L67/00 ,  C08J3/07 ,  C08L67/02 ,  C08L67/04 ,  C09D167/00 ,  C09D167/02

    Abstract: PURPOSE:To prepare the title dispersion having high stability and workability, and giving a coating film having desirable properties, without using a surface active agent, by dispersing a specific polyester copolymer in an aqueous medium. CONSTITUTION:A polyester copolymer composed of (A) an aromatic dicarboxylic acid unit composed mainly of terephthalic acid, (B) a short-chain diol unit composed mainly of 1,4-butanediol, (C) 5-70wt%, based on the whole composition, of a poly(tetramethyleneoxide)glycol unit having a number average molecular weight of 300-6,000, and (D) 1-10mol%, based on the (A) component, of an ester-forming sulfonic acid metal salt monomer (pref. 3-sulfoisophthalic acid sodium salt), is dispersed stably in an aqueous medium essentially without forming precipitate. The average particle diameter is

    AQUEOUS DISPERISON OF POLYESTER* AND ITS PREPARATION
    16.
    发明专利
    AQUEOUS DISPERISON OF POLYESTER* AND ITS PREPARATION 失效

    公开(公告)号：JPS5599947A

    公开(公告)日：1980-07-30

    申请号：JP610279

    申请日：1979-01-24

    Applicant: TORAY INDUSTRIES

    Inventor： TANAKA CHIAKI ,  FURUTA YOUKO ,  SUEYOSHI TADAHIRO

    IPC: C08L67/00 ,  C08L67/02 ,  C09D167/00

    Abstract: PURPOSE:To prepare the title aqueous dispersion having high stability and excellent workability, and giving a coating film of desirable characteristics, without using a surface active agent, by dispersing a specific polyester copolymer in a aqueous medium. CONSTITUTION:A polyester copolymer composed of (A) terephthalic acid, (B) 1,4-butanediol and ethylene glycol, (C) 20-60mol%, based on the components (A) and/or (B), of a dicarboxylic acid and/or a diol copolymer components, and (D) 1-5mol%, based on the dicarboxylic acid component, of an ester-forming sulfonic acid metal salt monomer (pref. 3-sulfo-isophthalic acid sodium salt), is dissolved in a solvent pref. composed mainly of tetrahydrofuran. The solvent is removed from the solution in the presence of water to obtain an aqueous dispersion of polyester having an average particle diameter of

    PRODUCTION OF LIQUID CRYSTALLINE RESIN AND LIQUID CRYSTALLINE RESIN COMPOSITION
    17.
    发明专利
    PRODUCTION OF LIQUID CRYSTALLINE RESIN AND LIQUID CRYSTALLINE RESIN COMPOSITION 失效

    公开(公告)号：JPH11228680A

    公开(公告)日：1999-08-24

    申请号：JP3749298

    申请日：1998-02-19

    Applicant: TORAY INDUSTRIES

    Inventor： SUGIMURA MASAHIRO ,  SUEYOSHI TADAHIRO ,  MAKABE YOSHIKI

    IPC: C08G63/78

    Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a liquid crystalline resin by which the difference of melt viscosities are decreased. SOLUTION: This method for producing a liquid crystalline resin comprising a liquid crystalline polyester or a liquid crystalline polyesteramide obtained by copolymerizing a raw material for the liquid crystalline polyester or the liquid crystalline polyesteramide, including 4,4'-dihydoxybiphenyl comprises using the 4,4'-dihydroxybiphenyl having >=100 μm of 50% diameter as the raw material when producing the polymer.

    PRODUCTION OF LIQUID-CRYSTALLINE POLYESTER
    18.
    发明专利
    PRODUCTION OF LIQUID-CRYSTALLINE POLYESTER 失效

    公开(公告)号：JPH107780A

    公开(公告)日：1998-01-13

    申请号：JP16476996

    申请日：1996-06-25

    Applicant: TORAY INDUSTRIES

    Inventor： ICHIKAWA YASUNORI ,  SUEYOSHI TADAHIRO ,  KISHIMOTO AKIHIKO

    IPC: C08G63/60 ,  C08G63/78

    Abstract: PROBLEM TO BE SOLVED: To provide a process whereby a liq.-crystalline polyester having high qualities, esp. an excellent heat resistance, can be produced at an improved productivity while reducing the amt. of a monomer or oligomer remaining in a polymerizer to prolong the cleaning cycle of the polymerizer by stirring under specified conditions. SOLUTION: In producing a liq.-crystalline polyester by polycondensation by acetic acid removal with a polymerizer having a material charge port, a stirring device, and a jacket, the polycondensation is conducted while the reactants are stirred under a shear rate of 150-1.000 (1/sec). Usually at least one material selected from among a hydroxycarboxylic acid, an acetoxycarboxylic acid, a dihydroxy compd., a diacetoxy compd., a dicarboxylic acid, and a polyester comprising dioxy units and dicarbonyl units is used. Pref. the reactants are stirred under a shear rate of 150-1,000 (1/sec) for at least 10% of the time from the beginning of stirring and temp. rise until the distillation ratio reaches 90%.

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