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公开(公告)号:US06691561B2
公开(公告)日:2004-02-17
申请号:US10122858
申请日:2002-04-15
IPC分类号: G01N1100
CPC分类号: B29C47/92 , B29C47/0009 , B29C2947/92019 , B29C2947/922 , B29C2947/92209 , B29C2947/92361 , B29C2947/92485 , B29C2947/926 , B29C2947/92695 , B29C2947/92885 , B29C2947/9298 , G01N11/08 , G01N33/442 , G01N2011/0013
摘要: A method and apparatus for measuring the rheological properties of a polymer melt includes flowing the polymer melt from a first reactor to a device through a conduit at a predetermined flow rate, measuring a first pressure of the polymer melt at a first location in the conduit, measuring a second pressure at a second location downstream from the first location, measuring a temperature at a third location in the conduit, wherein the third location is between the first location and the second location, and calculating the rheological property of the polymer melt as it flows through the conduit. The method and apparatus do not require diversion of the polymer melt from the main process stream.
摘要翻译: 用于测量聚合物熔体的流变性质的方法和装置包括以预定的流速将聚合物熔体从第一反应器流经设备通过导管,测量导管中第一位置处的聚合物熔体的第一压力, 在第一位置下游的第二位置处测量第二压力,测量导管中第三位置处的温度,其中第三位置在第一位置和第二位置之间,并且计算聚合物熔体的流变性质 流过管道。 该方法和设备不需要聚合物熔体从主工艺流的转移。
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公开(公告)号:US06492485B1
公开(公告)日:2002-12-10
申请号:US09547372
申请日:2000-04-11
申请人: Eric Thomas Gohr , Chad David Mistele , Michael F. Shannon , Vijaykumar Hanagandi , Devesh Mathur , Patrick Joseph McCloskey
发明人: Eric Thomas Gohr , Chad David Mistele , Michael F. Shannon , Vijaykumar Hanagandi , Devesh Mathur , Patrick Joseph McCloskey
IPC分类号: C08G6400
CPC分类号: B29C47/92 , B29C47/0021 , B29C2947/9218 , B29C2947/922 , B29C2947/92209 , B29C2947/92314 , B29C2947/92542 , B29C2947/9259 , B29C2947/92695 , B29C2947/92704 , B29C2947/92885 , B29C2947/92952 , C08G64/42
摘要: The application relates to methods for producing a polycarbonate resin having a narrowed molecular weight distribution, specifically, the application relates to the use of a redistribution catalyst and a feedback loop control mechanism to prepare narrow molecular weight distribution resin.
摘要翻译: 本申请涉及具有窄分子量分布的聚碳酸酯树脂的制造方法,具体地说,涉及使用再分布催化剂和反馈回路控制机构来制备窄分子量分布树脂。
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