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    Process for the production of thermoplastic polycarbonates
    2.
    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。

    Phosgene having low content of carbon tetrachloride
    5.
    发明授权
    Phosgene having low content of carbon tetrachloride 失效
    光气四氯化碳含量低

    公开(公告)号：US06930202B1

    公开(公告)日：2005-08-16

    申请号：US09807851

    申请日：1999-10-12

    申请人： Jürgen Heuser ,  Hermann Kauth ,  Christian Kords

    发明人： Jürgen Heuser ,  Hermann Kauth ,  Christian Kords

    IPC分类号： C01B32/80 ,  C08G64/22 ,  C07C51/58 ,  C07C67/02

    CPC分类号： C08G64/22 ,  C01B32/80

    摘要： A process for producing phosgene having low content of carbon tetrachloride is disclosed. The process entails reacting carbon monoxide with chlorine in the presence of elemental carbon, in a reactor. Critically the temperature of the gas stream emerging from the reactor is restricted to 30 to 80° C. and its pressure, measured directly downstream from said reactor is restricted to 120 to 400 kPaabs. The phosgene thus produced has a content of carbon tetrachloride that is less than 150 ppm.

    摘要翻译： 公开了一种生产低含量四氯化碳的光气的方法。 在反应器中，该过程需要在元素碳的存在下使一氧化碳与氯反应。 从反应器排出的气流的温度至关重要地限制在30至80℃，并且其直接从所述反应器下游测量的压力限制在120至400千帕绝对压力。 如此制得的光气的四氯化碳含量小于150ppm。

    Process for producing polycarbonates
    6.
    发明授权
    Process for producing polycarbonates 失效

    公开(公告)号：US06613868B2

    公开(公告)日：2003-09-02

    申请号：US10118362

    申请日：2002-04-08

    申请人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    发明人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    IPC分类号： C08G6400

    CPC分类号： C08G64/205 ,  C08G64/24

    摘要： A process for the production of polycarbonate is disclosed. The process, representing an improvement over the known interfacial polycondensation process entails introducing into the loop of a circulating reactor that additionally contains, a residence tank, an optional mixer, a pump, and a heat exchanger (i) an organic phase that contains a solvent for polycarbonate and phosgene and (ii) an aqueous phase that contains an aqueous lye solution, a dihydroxy compound and an optional monophenol to form an emulsion. Maintaining specified temperature and process conditions results in polycarbonate resin having good properties and in waste water that are characterized by their purity.

    Process for the preparation of thermoplastic polycarbonates
    8.
    发明授权
    Process for the preparation of thermoplastic polycarbonates 失效
    制备热塑性聚碳酸酯的方法

    公开(公告)号：US5340905A

    公开(公告)日：1994-08-23

    申请号：US191227

    申请日：1994-02-03

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

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

    IPC分类号： C08G64/14 ,  C08G64/20 ,  C08G64/30 ,  C08G64/40 ,  C08G64/00

    CPC分类号： C08G64/307 ,  C08G64/14

    摘要： A two step solvent-free process for the preparation of polycarbonates having a low degree of branching is disclosed. Accordingly, the process comprise(i) transesterifying in the melt, at temperatures of from 80.degree. to 250.degree. C. and under atmospheric pressure and for a time of up to five hours of diphenols and carbonic acid diaryl esters in the presence of a catalyst to form an oligocarbonate having a weight average molecular weight of from 8,000 to 18,000 and an OH-end group content of from 25 to 50%, and(ii) polycondensing of said oligocarbonate at temperatures of from 250.degree. C. to 295.degree. C. and pressures of from

    摘要翻译： 公开了一种用于制备具有低支化度的聚碳酸酯的两步无溶剂方法。 因此，该方法包括（i）在80℃至250℃的温度和大气压下在熔体中酯交换反应，并在催化剂存在下进行多达5小时的二酚和碳酸二芳基酯的酯交换反应 以形成重均分子量为8,000至18,000，OH-端基含量为25至50％的低聚碳酸酯，和（ii）所述低碳酸酯在250℃至295℃的温度下的缩聚反应。 和压力为<500毫巴至0.01毫巴，所述催化剂以每工具二酚的10-1至10-8工具的催化剂量存在，所述催化剂为选自以下的至少一种： 季铵化合物和季鏻化合物。

    Process for the preparation of polycarbonates
    10.
    发明授权
    Process for the preparation of polycarbonates 有权
    聚碳酸酯的制备方法

    公开(公告)号：US07071284B2

    公开(公告)日：2006-07-04

    申请号：US10751621

    申请日：2004-01-05

    申请人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    发明人： Hermann Kauth ,  Christian Kords ,  Jürgen Heuser

    IPC分类号： C08G64/00

    CPC分类号： C08G64/24 ,  C08G64/14

    摘要： An improvement in the continuous two-phase interfacial condensation process for preparing polycarbonate is disclosed. In the process that entails at least one diphenol, phosgene, at least one chain terminator, and optionally branching agents and is carried out in the presence of a catalyst the improvement comprising maintaining the concentration of the catalyst at a level of at least 0.012 mol per mol of diphenol.

    摘要翻译： 公开了用于制备聚碳酸酯的连续两相界面缩合方法的改进。 在需要至少一种二酚，光气，至少一种链终止剂和任选的支化剂的方法中，在催化剂存在下进行，其改进包括将催化剂的浓度维持在至少0.012mol / 摩尔二酚。