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38 条记录 (耗时 0.041 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.

    Working up of polymer synthesis solutions
    3.
    发明授权
    Working up of polymer synthesis solutions 失效
    加工聚合物合成溶液

    公开(公告)号：US06716933B2

    公开(公告)日：2004-04-06

    申请号：US10196022

    申请日：2002-07-16

    申请人： Wolfgang Alewelt ,  Wolfgang Ebert ,  Thomas Fritz ,  Dirk Jahn ,  Stefan Westernacher ,  Frank Bruynseels ,  Johann Rechner

    发明人： Wolfgang Alewelt ,  Wolfgang Ebert ,  Thomas Fritz ,  Dirk Jahn ,  Stefan Westernacher ,  Frank Bruynseels ,  Johann Rechner

    IPC分类号： C08G6400

    CPC分类号： C08F6/10 ,  C08G64/40

    摘要： The present invention relates to a process for working up solutions of polymers in organic solvents contaminated by alkaline constituents, using homogeneously soluble acids, especially by the introduction of an acid gas, and subsequent washing, and to the polymers so obtainable, which are distinguished by the fact that, on treatment with moist heat (sterilisation), only few defects caused by decomposition are formed, to the use thereof in the production of extrudates and molded specimen, and to the extrudates and molded specimen produced from those polymers themselves.

    摘要翻译： 本发明涉及使用均匀溶解的酸，特别是通过引入酸性气体和随后的洗涤以及可获得的聚合物来处理聚合物在被碱性成分污染的有机溶剂中的溶液的方法以及可获得的聚合物， 在湿热处理（灭菌）中，形成仅有少量由分解引起的缺陷，用于生产挤出物和模塑试样，以及由这些聚合物本身制备的挤出物和模塑试样。

    Process for the production of thermoplastic polycarbonates
    4.
    发明授权
    Process for the production of thermoplastic polycarbonates 失效
    用于生产热塑性聚碳酸酯的方法

    公开(公告)号：US5373082A

    公开(公告)日：1994-12-13

    申请号：US155309

    申请日：1993-11-19

    申请人： Hermann Kauth ,  Steffen Kuhling ,  Wolfgang Alewelt ,  Dieter Freitag

    发明人： Hermann Kauth ,  Steffen Kuhling ,  Wolfgang Alewelt ,  Dieter Freitag

    IPC分类号： C08G64/20 ,  C08G64/30 ,  C08G64/40 ,  C08G64/42 ,  C08J11/28 ,  C08K5/00 ,  C08L69/00 ,  C08G64/00

    CPC分类号： C08G64/30

    摘要： A process for the production of polycarbonates by melt transesterification is disclosed. Accordingly, polycarbonate waste is dissolved in monophenols and at an elevated temperature and in the presence of a catalyst degraded to yield oligocarbonates, diaryl carbonates and diphenols. Following the optional separation of fillers and other additives there is produced by partial recondensation and the distillation of monophenol a higher viscosity oligocarbonate having a OH and aryl carbonate terminal groups and a weight average molecular weight of 8000 to 18000, the oligocarbonate thus produced is then polycondensed to form a polycarbonate resin.

    摘要翻译： 公开了通过熔融酯交换法生产聚碳酸酯的方法。 因此，将聚碳酸酯废物溶解在单酚中并在升高的温度下并在催化剂存在下降解以产生低聚碳酸酯，碳酸二芳基酯和二酚。 在填充剂和其它添加剂的任选分离之后，通过部分重新缩合和单酚蒸馏产生具有OH和芳基碳酸酯末端和重均分子量为8000至18000的较高粘度的低聚碳酸酯，然后将如此生产的低聚碳酸酯进行缩聚 以形成聚碳酸酯树脂。

    Flame retardant polycarbonate compositions
    6.
    发明授权
    Flame retardant polycarbonate compositions 失效
    阻燃聚碳酸酯组合物

    公开(公告)号：US4753994A

    公开(公告)日：1988-06-28

    申请号：US936852

    申请日：1986-12-02

    申请人： Russell P. Carter, Jr. ,  Ulrich Grigo ,  Sivaram Krishnan ,  Mark W. Witman ,  Klaus Kircher ,  Hans-Jurgen Kress ,  Wolfgang Alewelt

    发明人： Russell P. Carter, Jr. ,  Ulrich Grigo ,  Sivaram Krishnan ,  Mark W. Witman ,  Klaus Kircher ,  Hans-Jurgen Kress ,  Wolfgang Alewelt

    IPC分类号： C08J3/20 ,  C08J3/00 ,  C08J3/215 ,  C08L69/00

    CPC分类号： C08J3/005 ,  C08L69/00

    摘要： The present invention is related to polycarbonate molding compositions containing a co-precipitate of a polycarbonate resin and a fluoropolymer. This co-precipitate was found to be suitable as an additive for polycarbonate resins because it offers improved dispersibility with the resin and good flammability performance as well as aesthetic characteristics. The co-precipitate is prepared by first mixing an aqueous dispersion of a fluoropolymer with a polycarbonate solution and then precipitating both using a suitable precipitation agent. After isolation washing and drying the co-precipitate of the invention is suitable for incorporation in a polycarbonate resin optionally with known flame retarding agents. Molded parts prepared from the compositions of the invention are characterized by their improved homogeneity and flame retardance.

    摘要翻译： 本发明涉及含有聚碳酸酯树脂和含氟聚合物的共沉淀物的聚碳酸酯模塑组合物。 发现这种共沉淀物适合作为聚碳酸酯树脂的添加剂，因为它提供了与树脂的改善的分散性和良好的可燃性以及美学特性。 通过首先将含氟聚合物的水性分散体与聚碳酸酯溶液混合，然后使用合适的沉淀剂沉淀二者来制备共沉淀物。 分离洗涤和干燥后，本发明的共沉淀物适合于任选地使用已知的阻燃剂掺入聚碳酸酯树脂中。 由本发明组合物制备的成型部件的特征在于其均匀性和阻燃性的改善。

    Containers made of a branched polycarbonate
    7.
    发明授权
    Containers made of a branched polycarbonate 有权
    容器由支链聚碳酸酯制成

    公开(公告)号：US06613869B1

    公开(公告)日：2003-09-02

    申请号：US10070792

    申请日：2002-04-12

    申请人： Klaus Horn ,  Ralf Hufen ,  Wolfgang Alewelt ,  Peter Gebauer ,  Franky Bruynseels

    发明人： Klaus Horn ,  Ralf Hufen ,  Wolfgang Alewelt ,  Peter Gebauer ,  Franky Bruynseels

    IPC分类号： C08G6400

    CPC分类号： C08G64/14 ,  Y10T428/1397

    摘要： A branched polycarbonate resin suitable for making containers is disclosed. The polycarbonate is characterized in that at 260° C. and shear rate of 10 s−1 it has a melt viscosity of 5500 to 900 Pas, and in that at 260° C. and shear rate of 1000 s−1 it has a melt viscosity of 880 tom 1500 Pas, and in that it has a melt flow index (MFR) of 0.1 to 3.0 g/10 min. A container made of the polycarbonate exhibits great breaking strength.

    摘要翻译： 公开了一种适于制造容器的支化聚碳酸酯树脂。 聚碳酸酯的特征在于，在260℃和剪切速率为10s -1的条件下，其熔体粘度为5500至900Pa·s，在260℃和剪切速率为1000s -1的条件下具有熔体 粘度为880汤姆为1500Pa·s，熔体流动指数（MFR）为0.1〜3.0g / 10分钟。 由聚碳酸酯制成的容器具有很大的断裂强度。