利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.015 秒)

    Thermotropic copolyester, process for preparing it and its use
    3.
    发明公开
    Thermotropic copolyester, process for preparing it and its use 失效
    热收缩共聚酯，Verfahren zu dessen Herstellung und seine Verwendung。

    公开(公告)号：EP0347963A2

    公开(公告)日：1989-12-27

    申请号：EP89201384.8

    申请日：1989-05-31

    申请人： ENIRICERCHE S.p.A.

    发明人： Pedretti, Ugo ,  Bresci, Bruno c/o DIPARTIMENTO INGEGNERIA CHIMICA ,  Bonfanti, Cesarina ,  Magagnini, Pier Luigi c/o DIPARTIMENTO INGEGNERIA ,  La Mantia, Francesco Paolo ,  Roggero, Arnaldo

    IPC分类号： C08G63/60 ,  C09K19/38

    CPC分类号： D01F6/84 ,  C08G63/60 ,  C09K19/3809

    摘要： A thermotropic copolyester, showing a liquid-­crystalline structure of nematic type within a desired temperature range, contains umits deriving from:

    (a) a saturated bicarboxy aliphatic acid;
    (b) 4,4′-di-hydroxy-biphenyl;
    (c) 4-hydroxybenzoic acid; and
    (d) 4-hydroxy-benzoic acid bearing an alkyl substituent or a halogen atom bonded to the aromatic ring.

    Such a copolyester constitutes a material endowed with self-reinforcing characteristics, originating, through the usual transformation processes by injection or by extrusion techniques, marked molecular orientations, which supply the manufactured articles with high stiffness characteristics.
    Said material can be also used as a reinforcing agent when is mixed, by means fo the usual techniques, with the traditional thermoplastic polymers.

    摘要翻译： 在期望的温度范围内显示向列型液晶结构的热致共聚酯包含得自以下的微米：（a）饱和的二羧基脂肪酸; （b）4,4'-二羟基 - 联苯; （c）4-羟基苯甲酸; 和（d）具有与芳环键合的烷基取代基或卤素原子的4-羟基 - 苯甲酸。 这种共聚酯构成具有自增强特性的材料，通过通过注射或通过挤出技术的通常的转化方法产生标记的分子取向，该方法为具有高刚度特性的制品提供。 当通过常规技术与传统的热塑性聚合物混合时，所述材料也可以用作增强剂。