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    COPOLYAMIDE FILAMENT YARNS AND THEIR PRODUCTION
    1.
    发明专利
    COPOLYAMIDE FILAMENT YARNS AND THEIR PRODUCTION 失效

    公开(公告)号：JPS5482427A

    公开(公告)日：1979-06-30

    申请号：JP14656577

    申请日：1977-12-08

    Applicant: UBE INDUSTRIES

    Inventor： KANEDA TAKAHO ,  ISHIKAWA SEIJI ,  HONDOU TADAHIRO ,  UEDA MASAHIRO

    IPC: D01F6/80 ,  D01F6/60

    Abstract: PURPOSE:Filament yarns having high initial modlus and tenacity, made from a wholly aromatic copolyamide consisting of specific sturctural units. CONSTITUTION:A solution of a copolyamide consisting substantially of units of formula I: (X is CO or SO2) and units of formula II and III in substantially equimolar amounts of units of formula III and formula I and II at a molar ratio of the units of formulas (I) to (II) of 10:90-50:50 in >=98% conc. sulfuric acid is spun into filament yarns having an inital modulus >=400g/dl and a tenacity >=16g/ dl. The copolyamide has an inherent viscosity >=2.0 dl/g, preferably >=3.0dl/g measured by using a 0.5g/dl solution in conc. sulfuric acid at 30 deg.C.

    AROMATIC POLYAMIDE FIBER AND ITS PRODUCTION
    3.
    发明专利
    AROMATIC POLYAMIDE FIBER AND ITS PRODUCTION 失效

    公开(公告)号：JPS569425A

    公开(公告)日：1981-01-30

    申请号：JP8491579

    申请日：1979-07-06

    Applicant: UBE INDUSTRIES

    Inventor： KANEDA TAKAHO ,  ISHIKAWA SEIJI ,  DAIMON HIROSHI ,  UEDA MASAHIRO ,  HONDOU TADAHIRO

    IPC: D01F6/80

    Abstract: PURPOSE:To obtain the titled fiber having improved initial modulus, tensile strength, knot strength and heat resistance, by wet spinning a solution of a polyamide comprising a dichlorobenzidinesulfonic acid as a diamine component in a conc. sulfuric acid. CONSTITUTION:A polyamide consisting of (A) a dichlorobenzidinesulfonic acid of formula I and (B) p-phenylene-diamine of formula II as an amine component and (C) terephthalic acid of formula III as an acid component is dissolved in a >=98% conc sulfuric acid. The resulting solution is extruded to give the objective fiber having an initial modules >=400g/d and a tensile strength >=14g/d. The molar ratio of (A) to (B) is preferably 10:90-50:50. The fiber is then heat-treated if necessary at 200-600 deg.C within 15sec under a tension of 5g/d or lower. EFFECT:Improved adhesiveness to various plastics and rubbers.

    PREPARATION OF 3*3**4*4**BIPHENYLTETRACARBOXYLIC ACID SALT
    4.
    发明专利
    PREPARATION OF 3*3**4*4**BIPHENYLTETRACARBOXYLIC ACID SALT 失效

    公开(公告)号：JPS5520705A

    公开(公告)日：1980-02-14

    申请号：JP9247078

    申请日：1978-07-31

    Applicant: UBE INDUSTRIES

    Inventor： KANEDA TAKAHO ,  DAIMON HIROSHI ,  UEDA MASAHIRO ,  HONDOU TADAHIRO

    IPC: C07C63/331 ,  C07B37/04 ,  C07C51/00 ,  C07C51/347 ,  C07C67/00

    Abstract: PURPOSE:To prepare a 3,3',4,4'-brphenyltertracarboxylic acid salt, selectively, in high yield, by carrying out coupling reaction of a mixture of halogenated o-phthalic acid salts containing a 4-halogeno-o-phthalic acid salt in an aqueous solution containing an alkali hydroxide. CONSTITUTION:A desired compound is prepared by carrying out the thermal coupling reaction of a mixture of halogenated o-phthalic acid salts containing a 4-halogeno-o-phthalic acid salt (30 - 99.5 mole % on the basis of the total amount of the halogenated-o-phthalic acid salts) in an aqueous solution containing an alkali hydroxide at 50 - 150 deg.C for 0.2 - 30 hr in the presence of a matallic Pd catalyst carried on a carrier, preferably Pd/C or Pd/calcium carbonate catalyst, and a samll amount of methanol. The by-produced o-phthalic acid salts are recovered as o-phthalic acid or its anhydride and can be recycled for the preparation of the halogenated phthalic acid salts. USE:Raw material of polyimide resin.

    RECOVERY OF NNALKYLAMIDES
    6.
    发明专利
    RECOVERY OF NNALKYLAMIDES 失效

    公开(公告)号：JPS55141450A

    公开(公告)日：1980-11-05

    申请号：JP4971179

    申请日：1979-04-24

    Applicant: UBE INDUSTRIES

    Inventor： KANEDA TAKAHO ,  UEDA MASAHIRO ,  HONDOU TADAHIRO

    IPC: C07D235/26 ,  C07C67/00 ,  C07C231/00 ,  C07C231/24 ,  C07D207/267 ,  C07D213/64

    Abstract: PURPOSE:To extract and recover an N-alkylamide from an aqueous solution containing the amide, in high efficiency, by using a specific extraction solvent. CONSTITUTION:N-Alkylamides (e.g. DMA, NMP, 1,3-dimethyl-2-imidazolidinone) are recovered from an aqueous solution containing the amides, by extracting with an extraction solvent selected from pyrrole, anilines, 1-pentanol, cyclohexanol, 3- chloropropionitrile, and phenols. The volume ratio of the solvent to the solution is 0.05-5 to 1. Useful for the recovery of N-alkylamides from a large amount of wash water used for the separation of an aromatic polyamide from its solution. The process can be applied effectively even if the wash water contains LiCl or CaCl2.

    COPOLYAMIDE FIBER AND ITS PRODUCTION
    7.
    发明专利
    COPOLYAMIDE FIBER AND ITS PRODUCTION 失效

    公开(公告)号：JPS54106621A

    公开(公告)日：1979-08-21

    申请号：JP28278

    申请日：1978-01-06

    Applicant: UBE INDUSTRIES

    Inventor： KANEDA TAKAHO ,  ISHIKAWA SEIJI ,  DAIMON HIROSHI ,  KATSURA TOSHIO ,  HONDOU TADAHIRO ,  UEDA MASAHIRO

    IPC: D01F6/80 ,  C08G69/32

    Abstract: PURPOSE:Copolyamide fibers that are composed of specific structures as recurring units and useful for industrial fibers as reinforcing materials for rubber products, ropes, filter cloths, a variety of covering cloths and others because of their high initial modulus, tensile strength, knot strength and heat resistance. CONSTITUTION:Said copolyamide fibers are substantially composed of rccurring units of structures shown by formula I, II and III wherein the units of formula I and II is substantialy equimolar with the unit of formula III and the molar ratio of the unit of formula I to that of formula II is 10/90-50/50. A copolyamide with an inherent viscosity of over 2.0, preferably over 3.0 dl/g measured with 0.5g/dl solution in 95-98% sulfuric acid at 30 deg.C is wet spun using conc, or fuming sulfuric acid as a solvent and water as a coagulant, forming fibers with initial modulus over 400g/d and tensile strength over 16g/d.

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