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    Transesterification process for the production of polycarbonates having a low content of volatile compounds
    1.
    发明授权
    Transesterification process for the production of polycarbonates having a low content of volatile compounds 有权
    用于生产挥发性化合物含量低的聚碳酸酯的酯交换方法

    公开(公告)号：US07279544B2

    公开(公告)日：2007-10-09

    申请号：US11002866

    申请日：2004-12-02

    申请人： Uwe Hucks ,  Melanie Möthrath ,  Helmut-Werner Heuer ,  Thomas König ,  Lydia Simon ,  Marc Buts ,  Johan Vanden Eynde

    发明人： Uwe Hucks ,  Melanie Möthrath ,  Helmut-Werner Heuer ,  Thomas König ,  Lydia Simon ,  Marc Buts ,  Johan Vanden Eynde

    IPC分类号： C08G64/00

    CPC分类号： C08G64/307

    摘要： A multi stage process for the production of polycarbonates having low monomer content is disclosed. The process entails, in sequence, (i) transesterifying in the melt at least one dihydroxyaryl compound with at least one diaryl carbonate in the presence of at least one onium catalyst to produce a polycondensate that contains monomers, (ii) introducing into the polycondensate an inhibitor in an hypostoichiometric amount in relation to the catalyst and (iii) reducing in a finishing reactor the content of monomers in said polycondensate. The polycarbonate thus produced is characterized in that it contains less than 350 ppm of diphenyl carbonate, less than 40 ppm of 2,2-bis-(4-hydroxyphenyl)propane and less than 150 ppm of phenol.

    摘要翻译： 公开了一种生产具有低单体含量的聚碳酸酯的多阶段方法。 该方法按顺序进行，（i）在至少一种鎓催化剂的存在下，使至少一种二羟基芳基化合物与至少一种碳酸二芳基酯在至少一种二羟基芳基化合物中酯交换以产生含有单体的缩聚物，（ii）将所述缩聚物引入到缩聚物中 抑制剂相对于催化剂的低化学计量量，和（iii）在精整反应器中还原所述缩聚物中单体的含量。 如此生产的聚碳酸酯的特征在于其含有少于350ppm的碳酸二苯酯，小于40ppm的2,2-双 - （4-羟基苯基）丙烷和小于150ppm的苯酚。

    Process for stripping monomers and other volatile constituents from polymer melts
    3.
    发明授权
    Process for stripping monomers and other volatile constituents from polymer melts 失效
    从聚合物熔体中提取单体和其他挥发性成分的方法

    公开(公告)号：US07060788B2

    公开(公告)日：2006-06-13

    申请号：US11002396

    申请日：2004-12-02

    申请人： Uwe Hucks ,  Thomas König ,  Melanie Möthrath

    发明人： Uwe Hucks ,  Thomas König ,  Melanie Möthrath

    IPC分类号： C08F6/00

    CPC分类号： B01D1/222 ,  B01D3/08 ,  B01F7/00491 ,  B01F7/10 ,  C08F6/005

    摘要： A process for stripping volatile constituents from polymer melts is disclosed. The process entails introducing the polymer melt into a horizontally oriented cylindrical device that contains a plurality of perforated disks rotating about a common horizontally oriented, externally driven shaft bringing the melt and disks into contact in a manner calculated to constantly renew the surface of the melt to be stripped. Also disclosed is an apparatus suitable for the process.

    摘要翻译： 公开了从聚合物熔体中汽提挥发性成分的方法。 该方法需要将聚合物熔体引入到水平取向的圆柱形装置中，该装置包含围绕公共水平取向的外部驱动的轴旋转的多个多孔板，使得熔体和盘以计算为不断更新熔体表面的方式接触 剥离。 还公开了适用于该方法的装置。

    Process for the preparation of polycarbonate
    5.
    发明授权
    Process for the preparation of polycarbonate 有权
    制备聚碳酸酯的方法

    公开(公告)号：US07091302B2

    公开(公告)日：2006-08-15

    申请号：US11105678

    申请日：2005-04-14

    申请人： Jörg Kirchhoff ,  Thomas König ,  Klemens Kohlgrüber ,  Steffen Kühling ,  Melanie Möthrath ,  Dirk Van Meirvenne

    发明人： Jörg Kirchhoff ,  Thomas König ,  Klemens Kohlgrüber ,  Steffen Kühling ,  Melanie Möthrath ,  Dirk Van Meirvenne

    IPC分类号： C08G64/00

    CPC分类号： C08G64/205 ,  C08G64/307

    摘要： The invention describes a process for the preparation of polycarbonate. The process includes (a) transesterifying at least one aromatic dihydroxyaryl compound and a diaryl carbonate in the melt in the presence of a catalyst, (b) mixing the melt obtained in step (a) with a foaming agent (c) passing the mixture at 250 to 340° C. through inlet openings of a separating vessel at a rate of 0.1 to 20 kg/hour, to obtain a plurality of streams of foamed polycarbonate and degassing the streams of foamed polycarbonate in the separating vessel wherein the pressure is 0.1 to 20 mbar.

    摘要翻译： 本发明描述了制备聚碳酸酯的方法。 该方法包括（a）在催化剂存在下，在熔体中将至少一种芳族二羟基芳基化合物和碳酸二芳基酯酯交换反应，（b）将步骤（a）中获得的熔体与通过该混合物的发泡剂（c） 通过分离容器的入口开口以0.1至20kg /小时的速度通过入口开口250至340℃，以获得多个发泡聚碳酸酯流并在分离容器中对发泡聚碳酸酯流进行脱气，其中压力为0.1至 20毫巴