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18 条记录 (耗时 0.025 秒)

    Production and use of polyester carbonates
    2.
    发明授权
    Production and use of polyester carbonates 失效

    公开(公告)号：US06646099B2

    公开(公告)日：2003-11-11

    申请号：US10180351

    申请日：2002-06-26

    申请人： Silke Kratschmer ,  Lothar Bunzel ,  Wolfgang Alewelt ,  Renate Wilms

    发明人： Silke Kratschmer ,  Lothar Bunzel ,  Wolfgang Alewelt ,  Renate Wilms

    IPC分类号： C08G6400

    CPC分类号： C08G63/64

    摘要： A transesterification process for producing polyester is disclosed. In a first stage of the process there is heated, in an inert gas atmosphere, a first mixture containing at least one dihydroxy compound and at least one diaryl carbonate to form an oligocondensate. In a second stage there is added to the oligocondensate at least one dicarboxylic acid to form a second mixture. The second mixture is heated to a temperature not higher than 290° C. in the presence of a quaternary onium compound as catalyst to form polyester carbonate. Hydroxyaryl formed throughout the process is distilled-off under reduced pressure.

    Preparation of copolycarbonates
    4.
    发明授权
    Preparation of copolycarbonates 失效
    共聚碳酸酯的制备

    公开(公告)号：US06753405B2

    公开(公告)日：2004-06-22

    申请号：US10195082

    申请日：2002-07-12

    申请人： Silke Kratschmer ,  Lothar Bunzel ,  Hans Deml

    发明人： Silke Kratschmer ,  Lothar Bunzel ,  Hans Deml

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： A process for the preparation of transparent copolycarbonate is disclosed. The copolycarbonate the molecular structure of which contains more than 35 mole % of units derived from dihydroxydiphenylene is prepared by the melt transesterification process wherein the final temperature of the reaction is reached in less than 40 minutes after reaching the starting temperature.

    摘要翻译： 公开了制备透明共聚碳酸酯的方法。 其分子结构含有多于35摩尔％的由二羟基二亚苯衍生的单元的共聚碳酸酯通过熔融酯交换方法制备，其中在达到起始温度后不到40分钟达到反应的最终温度。

    Polycarbonate and molded polycarbonate articles
    5.
    发明授权
    Polycarbonate and molded polycarbonate articles 失效
    聚碳酸酯和聚碳酸酯制品

    公开(公告)号：US06740730B1

    公开(公告)日：2004-05-25

    申请号：US10031502

    申请日：2002-01-15

    申请人： Silke Kratschmer ,  Uwe Hucks ,  Lothar Bunzel

    发明人： Silke Kratschmer ,  Uwe Hucks ,  Lothar Bunzel

    IPC分类号： C08G6400

    CPC分类号： C08G64/307 ,  C08G64/14

    摘要： The invention relates to a novel polycarbonate and its use a material in the production of molded articles and semifinished products, especially for transparent articles such as data memories or radio compact discs, slabs, cellular sheets, films, housings, panes, especially panes for motor vehicles, diffusion glasses, but also for electrical applications or the constructions of houses.

    摘要翻译： 本发明涉及一种新型聚碳酸酯及其在制造模制品和半成品中的材料，特别是用于透明制品如数据存储器或无线电光盘，板，蜂窝片，薄膜，壳体，窗格，尤其是用于电动机的窗格 车辆，扩散眼镜，还可用于电气应用或房屋建筑。

    Method for producing modified polycarbonates
    6.
    发明授权
    Method for producing modified polycarbonates 有权
    改性聚碳酸酯的制备方法

    公开(公告)号：US06596840B1

    公开(公告)日：2003-07-22

    申请号：US10031630

    申请日：2002-01-15

    申请人： Silke Kratschmer ,  Uwe Hucks ,  Lothar Bunzel

    发明人： Silke Kratschmer ,  Uwe Hucks ,  Lothar Bunzel

    IPC分类号： C08G6400

    CPC分类号： C08G64/14 ,  C08G64/307

    摘要： A process for the synthesis of polycarbonate is disclosed. The process entails reacting in the presence of at least one phosphonium salt as catalyst, at least one diphenol, at least one carbonic acid diester, and at least one alkyl group-substituted phenol chain terminator. The chain terminator is introduced in free form or as a transesterifiable compound under the conditions of the synthesis. The polycarbonate thus produced is suitable for preparing a variety of molded articles.

    摘要翻译： 公开了一种合成聚碳酸酯的方法。 该方法需要在至少一种鏻盐作为催化剂，至少一种二酚，至少一种碳酸二酯和至少一个烷基取代的苯酚链终止剂存在下反应。 该链终止剂在合成条件下以游离形式或作为可酯交换化合物引入。 由此生产的聚碳酸酯适于制备各种模塑制品。

    Method for producing polycarbonates
    9.
    发明授权
    Method for producing polycarbonates 有权
    聚碳酸酯的制备方法

    公开(公告)号：US06887970B2

    公开(公告)日：2005-05-03

    申请号：US10473316

    申请日：2002-03-13

    申请人： Silke Kratschmer ,  Uwe Hucks ,  Michael Prein

    发明人： Silke Kratschmer ,  Uwe Hucks ,  Michael Prein

    IPC分类号： C08G64/30 ,  C08G64/00

    CPC分类号： C08G64/307

    摘要： The invention relates to a continuous method for producing polycarbonates by transesterifying diaryl carbonates with dihydroxyaryl compounds in the presence of quaternary onium compounds. The invention also relates to polycarbonates produced thereby and products produced from said polycarbonates.

    摘要翻译： 本发明涉及通过在季鎓化合物的存在下将碳酸二芳基酯与二羟基芳基化合物酯交换来生产聚碳酸酯的连续方法。 本发明还涉及由此生产的聚碳酸酯和由所述聚碳酸酯生产的产品。

    Process for the recycling of polycarbonates
    10.
    发明授权
    Process for the recycling of polycarbonates 失效
    聚碳酸酯回收工艺

    公开(公告)号：US06887968B2

    公开(公告)日：2005-05-03

    申请号：US10229787

    申请日：2002-08-28

    申请人： Heinrich Hähnsen ,  Uwe Hucks ,  Silke Kratschmer ,  Manfred Schraut

    发明人： Heinrich Hähnsen ,  Uwe Hucks ,  Silke Kratschmer ,  Manfred Schraut

    IPC分类号： C08G64/40 ,  C08G64/42 ,  C08G64/00

    CPC分类号： C08G64/42

    摘要： A process for making a high molecular weight (co)polycarbonate resin is disclosed. The process entails (i) obtaining at least one member selected from the group low molecular weight residue (weight average molecular weight 15,000 to 30,000) of aromatic (co)polycarbonate production, waste of (co)polycarbonate production, remainders of (co)polycarbonate production and (co)polycarbonate recyclate (ii) melting the said member in a suitable vessel to obtain a melt and (iii) feeding the melt into a reactor optionally along with at least one bisphenol or oligocarbonate having terminal OH groups and further optionally with a transesterification catalyst, and (iv) subjecting the melt to transesterification reaction at a temperature of 250 to 350° C., at a pressure below 5 mbar and residence time of 0.02-4 hours.

    摘要翻译： 公开了制备高分子量（共）聚碳酸酯树脂的方法。 该方法包括：（i）获得选自芳族（共）聚碳酸酯生产的低分子量残余物（重均分子量为15,000至30,000）中的至少一种，（共）聚碳酸酯生产的废弃物，（共）聚碳酸酯的剩余物 生产和（共）聚碳酸酯回收（ii）在合适的容器中熔化所述构件以获得熔体，和（iii）将熔体任选地与至少一种具有末端OH基的双酚或低聚碳酸酯一起进料到反应器中， 酯交换催化剂，和（iv）在250-350℃的温度，低于5mbar的压力和0.02-4小时的停留时间下对熔体进行酯交换反应。