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公开(公告)号:US06720406B1
公开(公告)日:2004-04-13
申请号:US10111999
申请日:2002-04-30
申请人: Thomas Elsner , Jürgen Heuser , Christian Kords , Steffen Kühling , Paul Viroux
发明人: Thomas Elsner , Jürgen Heuser , Christian Kords , Steffen Kühling , Paul Viroux
IPC分类号: C08F600
CPC分类号: C08J3/12 , B29B9/06 , B29C2791/005 , B29K2069/00 , C08J2369/00 , G11B7/2534
摘要: A process for producing polymer pellets is disclosed. The process that is particular suitable for making polycarbonate pellets entails extruding a polymer melt, cooling the extrudate by contacting it with a cooling fluid and pelletizing the solidified polymer. The process is characterized in that the cooling fluid has a solids particle content of at most 10 ppm.
摘要翻译: 公开了制备聚合物颗粒的方法。 特别适用于制备聚碳酸酯颗粒的方法需要挤出聚合物熔体,通过使其与冷却流体接触并使固化的聚合物造粒来冷却挤出物。 该方法的特征在于冷却流体的固体颗粒含量至多为10ppm。
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公开(公告)号:US06710154B2
公开(公告)日:2004-03-23
申请号:US10169883
申请日:2002-07-10
IPC分类号: G08G6400
CPC分类号: G11B7/2534 , C08G64/06
摘要: A method for producing polycarbonate based on 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl cyclohexanone and 4,4-(metaphenylene diisopropyl) diphenol is disclosed. The method is characterized in that the recovery and/or further processing of the polycarbonate is performed at temperatures below 290° C. The polycarbonate thus produced has high purity and high transmission and is suitable for the manufacture of optical data stores.
摘要翻译: 公开了一种制备基于1,1-双(4-羟基苯基)-3,3,5-三甲基环己酮和4,4-(间苯二异丙基)二酚的聚碳酸酯的方法。 该方法的特征在于聚碳酸酯的回收和/或进一步加工在低于290℃的温度下进行。如此生产的聚碳酸酯具有高纯度和高透射率,并且适用于光学数据存储的制造。
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