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    1.
    发明专利
    未知

    公开(公告)号：DE3887555T2

    公开(公告)日：1994-06-30

    申请号：DE3887555

    申请日：1988-03-25

    Applicant: KANEBO LTD

    Inventor： KUSHIMOTO TOSHIHIRO ,  OZAWA YOSHIMICHI ,  IZAWA NOBUO

    IPC: C08G63/85

    Abstract: A process for producing a linear polyester comprising a main structural unit of an aromatic dicarboxylic acid ester of an alkylene glycol, particularly, comprising a polyethylene terephthalate or polytetramethylene terephthalate unit, is provided. In the process of the invention, the polycondensation reaction is conducted in the presence of a niobic acid catalyst that is obtained by heat-treating a hydrated niobium compound at the temperature range between 80 DEG C and 400 DEG C. The process of the invention is also effectively applied to the manufacture of an elastomeric polyester comprising a polyalkylene terephthalate as a hard segment and a polyalkylene glycol as a soft segment.

    2.
    发明专利
    未知

    公开(公告)号：DE3887555D1

    公开(公告)日：1994-03-17

    申请号：DE3887555

    申请日：1988-03-25

    Applicant: KANEBO LTD

    Inventor： KUSHIMOTO TOSHIHIRO ,  OZAWA YOSHIMICHI ,  IZAWA NOBUO

    IPC: C08G63/85

    Abstract: A process for producing a linear polyester comprising a main structural unit of an aromatic dicarboxylic acid ester of an alkylene glycol, particularly, comprising a polyethylene terephthalate or polytetramethylene terephthalate unit, is provided. In the process of the invention, the polycondensation reaction is conducted in the presence of a niobic acid catalyst that is obtained by heat-treating a hydrated niobium compound at the temperature range between 80 DEG C and 400 DEG C. The process of the invention is also effectively applied to the manufacture of an elastomeric polyester comprising a polyalkylene terephthalate as a hard segment and a polyalkylene glycol as a soft segment.

    PRODUCTION OF POLYETHYLENE NAPHTHALATE
    4.
    发明专利
    PRODUCTION OF POLYETHYLENE NAPHTHALATE 失效

    公开(公告)号：JPH08157582A

    公开(公告)日：1996-06-18

    申请号：JP33192194

    申请日：1994-12-08

    Applicant: KANEBO LTD

    Inventor： TAMURA KAZUTOSHI ,  OZAWA YOSHIMICHI ,  HASHIMURA TETSUTARO ,  NAITO HIROSHI

    IPC: C08G63/189 ,  C08G63/78 ,  C08G63/82

    Abstract: PURPOSE: To obtain a process for producing polyethylene naphthalate without causing troubles such as the occurrence of minute foreign matters and the coloration of the polymer by specifying the amts. of specific atoms contained in catalysts. additives. etc., added. CONSTITUTION: In producing polyethylene naphthalate by using a dialkyl dicarboxylate and a glycol as the main components and by conducting transesterification and polycondensation, catalysts, additives, etc., are added to the reaction system so as to satisfy the following relations: 1.0

    ANTISTATIC, READILY ADHERING POLYESTER FILM AND MANUFACTURE THEREOF
    6.
    发明专利
    ANTISTATIC, READILY ADHERING POLYESTER FILM AND MANUFACTURE THEREOF 失效

    公开(公告)号：JPH05216165A

    公开(公告)日：1993-08-27

    申请号：JP4752292

    申请日：1992-02-03

    Applicant: KONISHIROKU PHOTO IND ,  KANEBO LTD ,  KANEBO NSC KK

    Inventor： WADA YOSHIHIRO ,  NAKAJIMA AKIHISA ,  YAEGASHI KAORU ,  TACHIBANA NORIKI ,  KAWAMOTO HITOSHI ,  OZAWA YOSHIMICHI ,  NAITO HIROSHI ,  MORI MAKOTO ,  EBISAWA YUKIO

    IPC: B32B27/36 ,  G03C1/795 ,  G03C1/85

    Abstract: PURPOSE:To provide an under coating layer excellent in adhesive properties and antistatic properties and of a total water system by containing a specific conductive polymer and a water soluble and/or water-disperse polyester copolymer. CONSTITUTION:At least a conductive polymer having repeating units expressed by the formula, and a water-soluble and/or water-disperse polyester copolymer are contained in a plastic film as under coating layer compositions. In the formula, M represents a cation of valence 1 and (n) represents an integer of 1 to 3. The conductive polymer may be composed of only the repeating units expressed by the formula or may be a copolymer having other repeating units only if at least the repeating units expressed by the formula are contained in its constituent units. A water primer liquid having the under coating layer compositions is applied to at least one side of a polyester film before crystal orientation is completed, and the film is dried, rolled and cured by heat so that crystal orientation is completed.

    PRODUCTION OF POLYESTER
    8.
    发明专利
    PRODUCTION OF POLYESTER 失效

    公开(公告)号：JPS6272718A

    公开(公告)日：1987-04-03

    申请号：JP21330085

    申请日：1985-09-26

    Applicant: KANEBO LTD ,  KOKORITSU GOSEN GIJUTSU KENK

    Inventor： KUSHIMOTO TOSHIHIRO ,  OZAWA YOSHIMICHI ,  YOSHIKAWA ETSUO

    IPC: C08G63/86 ,  C08G63/82

    Abstract: PURPOSE:To rapidly produce a polyester having improved hue and thermal stability and high polymerization degree, by polycondensing a diglycol ester of an aromatic dicarboxylic acid (precondensate) in the presence of a specific compound as a catalyst. CONSTITUTION:(A) Preferably 0.001-0.5wt%, based on an acid component of the resultant polyester, compound expressed by the formula (X is CH2, C3H6, C4H8, C5H10, etc.; R is phenyl) is added to (B) terephthalic acid and (C) a glycol, e.g. ethylene glycol, and polycondensation is carried out at, e.g. 270-290 deg.C, to afford the aimed polyester.

    POLYESTER CONTAINER
    9.
    发明专利
    POLYESTER CONTAINER 失效

    公开(公告)号：JPH09239827A

    公开(公告)日：1997-09-16

    申请号：JP8470896

    申请日：1996-03-12

    Applicant: KANEBO LTD

    Inventor： TAMURA KAZUTOSHI ,  OZAWA YOSHIMICHI ,  HASHIMURA TETSUTARO ,  TONOMURA TERUE ,  NAITO HIROSHI

    IPC: B65D1/00 ,  B29C55/12 ,  B29D22/00 ,  B29K67/00 ,  B29L22/00 ,  B65D1/09 ,  C08J5/18

    Abstract: PROBLEM TO BE SOLVED: To obtain a polyester container excellent in easy tear propagation properties by using an oriented polyethylene naphthalate film specified in the refractive index and thickness in its thickness direction and based on naphthalene dicarboxylic acid and ethylene glycol. SOLUTION: A polyester container is composed of an oriented polyethylene naphthalate film based on naphthalene dicarboxylic acid and ethylene glycol and characterized by that a refractive index in the thickness direction thereof is 1.58 or less and, further pref., average tear strength at least in one direction is 0.30(kgf/mm) or less. The thickness of the oriented film is pref. 5-100μm and, as a naphthalene dicarboxylic acid component, a 2,6-naphthalene dicarboxylic acid component is especially pref. As a polycondensation method, a usual polyester polymerization method can be utilized and a direct polymerization method using dicarboxylic acid and diol and an ester exchange method using dimethyl dicarboxylate and diol are pref.

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