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    • 72. 发明申请
    • COPOLYESTER OBJECT
    • 共聚物对象
    • WO99033898A1
    • 1999-07-08
    • PCT/NL1998/000730
    • 1998-12-23
    • C08J5/00C08G63/185C08G63/189C08K7/14C08L67/02
    • C08G63/189C08G63/185
    • The invention relates to an object shaped from the melt from a copolyester composition, the copolyester of which consists of units derived from ethylene glycol and 2,6-naphthalenedicarboxylic acid and 4,4'-diphenyldicarboxylic acid, the copolyester having a high molecular weight, i.e. a relative viscosity of at least 1.8. The object of the invention is characterized by properties that are comparable with those of an object made from a copolyester composition, the copolyester of which belongs to the group comprising liquid crystalline copolyesters. The stiffness is exceptionally high, e.g. the HDT of non-reinforced copolyester amounted to 250 DEG C. Another property differing from corresponding liquid crystalline copolyester objects is the absence of the weak weld line that is characteristic of liquid crystalline polyesters.
    • 本发明涉及一种由来自共聚酯组合物的熔体形成的物体,其共聚酯由衍生自乙二醇和2,6-萘二羧酸的单元和4,4'-二苯基二羧酸组成,共聚酯具有高分子量, 即相对粘度至少为1.8。 本发明的目的的特征在于与由共聚酯组合物制成的物体的性能相当,其共聚酯属于包含液晶共聚酯的组。 刚度非常高,例如 非增强共聚酯的HDT为250℃。与相应的液晶共聚酯物体不同的另一特性是不存在液晶聚酯特征的弱焊接线。