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1. 发明授权

US5663277A Aromatic polycarbonate resin granule and process for the production thereof 失效
标题翻译：芳香族聚碳酸酯树脂颗粒及其生产方法
公开(公告)号：US5663277A
公开(公告)日：1997-09-02
申请号：US436230
申请日：1995-06-23
申请人： Hideki Isshiki , Akiyoshi Manabe , Toshinori Kitachi , Yoshifumi Ikemura , Katsuhiro Kutsuna , Tatsumi Horie
发明人： Hideki Isshiki , Akiyoshi Manabe , Toshinori Kitachi , Yoshifumi Ikemura , Katsuhiro Kutsuna , Tatsumi Horie
IPC分类号： C08J3/12 , C08G64/00
CPC分类号： C08J3/12 , C08J2369/00
摘要： An aromatic polycarbonate resin granule formed of an aggregate of fine powder particles, the granule having a specific surface area of 0.05 to 2.0 m.sup.2 /g, a bulk density of 0.3 to 0.8 g/ml, and an average particle diameter of 0.2 to 5 mm. At least 90% of the fine powder particles forming the granule have a particle diameter of 50 .mu.m or less, and the content of a halogenated hydrocarbon as an organic solvent in the granule is 50 ppm or less in terms of a halogen amount. The polycarbonate granule is obtained by preparing a slurry or wet paste containing a polycarbonate, in which the amount of an organic solvent based on the total amount of the polycarbonate and the organic solvent is 10 to 65% by weight, and the amount of water based on the polycarbonate is at least 5% by weight. The above slurry or wet paste is subjected to a pulverization step to form the fine powder particles in which at least 90% have a particle diameter of 50 .mu.m or less. The fine powder of the polycarbonate is treated to form an aggregate in which the amount of the organic solvent based on the total amount of the polycarbonate and the organic solvent is 10 to 65% by weight and the amount of water based on the polycarbonate is 5 to 20% by weight. The polycarbonate aggregate granule particles are subject to a drying step to obtain granules composed of the fine powder in which at least 90% retain a particle diameter of 50 .mu.m or less and in which the content of the halogenated hydrocarbon as an organic solvent in the granule is 50 ppm or less in terms of halogen amount.
摘要翻译： PCT No.PCT / JP94 / 01539 Sec。 371日期：1995年6月23日 102（e）日期1995年6月23日PCT 1994年9月20日PCT PCT。公开号WO95 / 08585 日期1995年3月30日由颗粒聚集体形成的芳香族聚碳酸酯树脂颗粒，比表面积为0.05〜2.0m 2 / g，体积密度为0.3〜0.8g / ml，平均粒径为0.2〜5mm。形成颗粒的至少90％的细粉末颗粒的粒径为50μm以下，颗粒中作为有机溶剂的卤代烃的含量以卤素量计为50ppm以下。聚碳酸酯颗粒通过制备含有聚碳酸酯的浆料或湿糊剂而获得，其中基于聚碳酸酯和有机溶剂的总量的有机溶剂的量为10〜65重量％，水基在聚碳酸酯上为至少5重量％。将上述浆料或湿糊剂进行粉碎步骤以形成其中至少90％具有50μm或更小的粒径的细粉末颗粒。将聚碳酸酯的细粉末进行处理以形成其中基于聚碳酸酯和有机溶剂的总量的有机溶剂的量为10至65重量％的聚集体，并且基于聚碳酸酯的水的量为5 至20重量％。聚碳酸酯聚集体粒状颗粒经受干燥步骤，得到由细粉末组成的颗粒，其中至少90％保持50μm或更小的粒径，其中作为有机溶剂的卤代烃的含量颗粒的卤素量为50ppm以下。

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