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    • 2. 发明公开
    • Polyglycolic acid sheet and production process thereof
    • Folie ausPolyglykolsäureund Verfahren zu ihrer Herstellung
    • EP0805176A1
    • 1997-11-05
    • EP97302906.9
    • 1997-04-29
    • KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
    • Kawakami, YukichikaSato, NobuoHoshino, MitsuruKouyama, ToshitakaShiiki, Zenya
    • C08J5/18C08G63/06B65D65/46
    • C08J5/18C08G63/06C08J2367/04
    • The invention provides a polyglycolic acid sheet obtainable by melt-extruding a thermoplastic resin material into a sheet in a temperature range of from the melting point, Tm of the polymer to 255°C, wherein the thermoplastic resin material comprises polyglycolic acid having a repeating unit represented by the following formula (1):
      and the following physical properties:

      (a) the melt viscosity, η* [as measured at a temperature of (the melting point, Tm of the polymer + 20°C) and a shear rate of 100/sec] being 500-100,000 Pa·s;
      (b) the melting point, Tm being at least 150°C;
      (c) the melt enthalpy, ΔHm being at least 20 J/g; and
      (d) the density being at least 1.50 g/cm 3 as measured in an unoriented, crystallized form,
      and the sheet has tensile strength of at least 60 MPa, and a production process thereof.
    • 本发明提供一种聚乙醇酸薄片,其可以通过将熔融挤出热塑性树脂材料在聚合物的熔点Tm至255℃的温度范围内熔融挤出,其中热塑性树脂材料包含具有重复单元的聚乙醇酸 由下式(1)表示:< CHEM>和以下物理性质:(a)在(熔点,聚合物的Tm + 20℃)和剪切温度下测定的熔体粘度ηa 100 /secÜ的比例为500-100,000 Pa.s; (b)熔点Tm为至少150℃; (c)熔体焓,DELTA Hm为至少20J / g; 和(d)以未取向的结晶形式测量的密度为至少1.50g / cm 3,并且该片材具有至少60MPa的拉伸强度及其制造方法。
    • 9. 发明公开
    • Processes for the production of arylene thioether oligomers and copolymers
    • Verfahren zur Herstellung von Arylenthioetheroligomeren und Copolymeren。
    • EP0508705A2
    • 1992-10-14
    • EP92303017.5
    • 1992-04-06
    • KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
    • Sato, HiroyukiHoshino, MitsuruKawakami, Yukichika
    • C08G75/02C08G81/02
    • C08G75/0286C08G63/688
    • Disclosed herein are a process for the preparation of a carboxylated arylene thioether oligomer, in which an alkali metal sulfide is caused to act on a poly(arylene thioether) so as to depolymerize the poly(arylene thioether), thereby preparing an alkali thiolate-containing oligomer, and a carboxylating agent is then caused to act on the alkali thiolate-containing oligomer, thereby forming the carboxylated arylene thioether oligomer, and a process for the production of an arylene thioether copolymer, wherein the carboxylated arylene thioether oligomer alone, which has been obtained in accordance with this preparation process, or a mixture of the carboxylated oligomer in an amount of at least 50 wt.% and another carboxylic compound in an amount less than 50 wt.% is reacted with an alkylenediol or an alkylenediol and a polyester or an alkylene diol and a lactone.
    • 本文公开了一种制备羧基化亚芳基硫醚低聚物的方法,其中使碱金属硫化物作用于聚(亚芳基硫醚)以使聚(亚芳基硫醚)解聚,从而制备含硫醇盐的碱 然后使低聚物和羧化剂作用于含有含硫醇盐的低聚物,从而形成羧基化亚芳基硫醚低聚物,以及生产亚芳基硫醚共聚物的方法,其中单独的羧化亚芳基硫醚低聚物 或者将至少50重量%的羧化低聚物和小于50重量%的另一个羧酸化合物的混合物与亚烷基二醇或亚烷基二醇和聚酯反应,或 亚烷基二醇和内酯。