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公开(公告)号：US20050239995A1
公开(公告)日：2005-10-27
申请号：US11105678
申请日：2005-04-14
申请人： Jorg Kirchhoff , Thomas Konig , Klemens Kohlgruber , Steffen Kuhling , Melanie Mothrath , Dirk Meirvenne
发明人： Jorg Kirchhoff , Thomas Konig , Klemens Kohlgruber , Steffen Kuhling , Melanie Mothrath , Dirk Meirvenne
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
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公开(公告)号：US20050239996A1
公开(公告)日：2005-10-27
申请号：US11105680
申请日：2005-04-14
CPC分类号： C08G64/403 , C08G64/205
摘要： A process for the isolation of polycarbonate produced by the interfacial polymerization process is disclosed. Accordingly, the process entails (a) evaporating the organic solvent from the solution that contains solvent and polycarbonate to obtain a material system that contains 90 to 99.95% polycarbonate, the percent being relative to the weight of the system, and (b) passing the material system through inlet openings of a separating vessel to obtain a plurality of streams of polycarbonate, on entry into the inlet openings said material system being supersaturated with volatile constituents to an extent of at least 1 bar and having a temperature of 250° to 340° C. and a flow rate of 0.1 to 20 kg/hour, and (c) degassing the streams in the separating vessel wherein the pressure is 0.1 to 20 mbar to effect degassing of the polycarbonate.
摘要翻译： 公开了通过界面聚合方法分离聚碳酸酯的方法。 因此，该方法需要（a）从含有溶剂和聚碳酸酯的溶液中蒸发有机溶剂以获得含有90至99.95％聚碳酸酯的材料体系，其百分数相对于体系重量，和（b）使 材料系统通过分离容器的入口开口，以获得多个聚碳酸酯流，在进入入口时，所述材料体系用挥发性成分过饱和至少1巴，温度为250°至340° 并且流速为0.1至20kg /小时，和（c）使分离容器中的气流脱气，其中压力为0.1至20毫巴，以实现聚碳酸酯脱气。
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公开(公告)号：US5767224A
公开(公告)日：1998-06-16
申请号：US823792
申请日：1997-03-24
申请人： Steffen Kuhling , Klaus Schebesta , Uwe Hucks , Martin Ullrich , Heinrich Schuchardt , Rolf Bachmann , Thomas Fischer , Klemens Kohlgruber , Franz Ferdinand Rhiel , Gottfried Zaby
发明人： Steffen Kuhling , Klaus Schebesta , Uwe Hucks , Martin Ullrich , Heinrich Schuchardt , Rolf Bachmann , Thomas Fischer , Klemens Kohlgruber , Franz Ferdinand Rhiel , Gottfried Zaby
CPC分类号： C08G64/307
摘要： The invention relates to a two-step melt process for the production of thermoplastic, solvent-free, low-branching polycarbonates with low --OH terminal group content using a self-cleaning high-viscosity reactor.
摘要翻译： 本发明涉及使用自清洁高粘度反应器生产具有低-OH端基含量的热塑性，无溶剂，低支化聚碳酸酯的两步熔融方法。
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4.发明授权
公开(公告)号：US5830977A
公开(公告)日：1998-11-03
申请号：US778654
申请日：1997-01-03
申请人： Claus Wulff , Gottfried Zaby , Clemens Casper , Klemens Kohlgruber , Hugo Obermann , Steffen Kuhling
发明人： Claus Wulff , Gottfried Zaby , Clemens Casper , Klemens Kohlgruber , Hugo Obermann , Steffen Kuhling
CPC分类号： C08J3/14 , C08G64/403 , C08J2369/00
摘要： The present invention provides a process for the isolation of partially crystalline polycarbonate powder or oligocarbonate powder from solutions thereof, in which process the organic solvent of a polycarbonate solution is vaporized in a heat exchanger, optionally with incorporation of steam, or in a holding tube with incorporation of steam and the pasty mixture of concentrated solution, solvent vapor and optionally water is separated in a separator. In this process, the solvent vapor is condensed in a heat exchanger downstream from the separator. The solvent is vaporized in the heat exchanger by indirect input of heat through the heat exchanger walls and vaporization may be promoted by preheating the polycarbonate or oligocarbonate solution in an upstream heat exchanger or by introducing steam or both.
摘要翻译： 本发明提供从其溶液中分离部分结晶的聚碳酸酯粉末或低聚碳酸酯粉末的方法，其中聚碳酸酯溶液的有机溶剂在热交换器中蒸发，任选地加入蒸汽，或在具有 在分离器中分离蒸汽和浓缩溶液，溶剂蒸气和任选的水的糊状混合物。 在该方法中，溶剂蒸汽在分离器下游的热交换器中冷凝。 溶剂在热交换器中通过热交换器壁的间接输入而蒸发，并且通过在上游热交换器中预热聚碳酸酯或低聚碳酸溶液或通过引入蒸汽或两者来促进蒸发。
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公开(公告)号：US20050043500A1
公开(公告)日：2005-02-24
申请号：US10954428
申请日：2004-09-30
CPC分类号： C08J5/18 , C08J2369/00 , C08L69/00 , Y10T428/31504 , Y10T428/31507
摘要： Polycarbonate substrates having low concentration of defects are disclosed. The substrates are suitable for producing molded articles characterized by low cloudiness.
摘要翻译： 公开了具有低浓度缺陷的聚碳酸酯基材。 该基材适用于生产特征为低混浊的模制品。
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公开(公告)号：US5440066A
公开(公告)日：1995-08-08
申请号：US222777
申请日：1994-04-04
IPC分类号： C07B61/00 , C07C37/055 , C07C39/08 , C07C39/15 , C07C39/16 , C07C39/17 , C07C41/26 , C07C43/295 , C07C45/65 , C07C49/83 , C07C68/06 , C07C69/96 , C07C315/04 , C07C317/22 , C07C319/20 , C07C323/20 , C08G64/42 , C08J11/24
CPC分类号： C07C68/06 , C08G64/42 , Y10S203/06
摘要： A continuous process for splitting an aromatic polycarbonate resin is disclosed. Accordingly there are reacted in a distillation column and in the presence of a catalyst(i) a polycarbonate resin in solution with(ii) methanolto produce a dihydroxy compound and dimethyl carbonate. The solution which contains polycarbonate and monohydroxy compound solvent exclusive of methanol is fed into the upper section of said column and the methanol is fed into the lower section of the column. The methanol is fed in the form of a mixture containing methanol and about 1-50 weight percent of dimethyl carbonate. The dimethyl carbonate thus produced is removed from an upper section of the column and the dihydroxy compound is removed from a lower section of the column.
摘要翻译： 公开了一种用于分离芳族聚碳酸酯树脂的连续方法。 因此，在蒸馏塔中和在催化剂（i）溶液中的聚碳酸酯树脂（ii）甲醇存在下反应生成二羟基化合物和碳酸二甲酯。 将含有聚碳酸酯和不含甲醇的单羟基化合物溶剂的溶液进料到所述塔的上部，并将甲醇进料到塔的下部。 甲醇以含有甲醇和约1-50重量％碳酸二甲酯的混合物的形式进料。 从柱的上部除去由此制得的二甲基碳酸酯，并从柱的下部除去二羟基化合物。
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7.发明授权
公开(公告)号：US5391802A
公开(公告)日：1995-02-21
申请号：US76715
申请日：1993-06-14
CPC分类号： C08G64/42 , C07C37/0555 , C07C37/84 , C07C68/06
摘要： A process is disclosed for cleaving polycarbonates into bisphenols and diaryl carbonates by transesterifying with phenols in the presence of catalysts. The process entails isolating bisphenols from the product of the transesterification, and subjecting the remaining mixture which contains phenols and diaryl carbonates to flash distillation. The phenols and diaryl carbonates are distilled off and separated, and the diaryl carbonates are recovered.
摘要翻译： 公开了一种通过在催化剂存在下与酚进行酯交换将聚碳酸酯裂解成双酚和碳酸二芳酯的方法。 该方法需要从酯交换反应产物中分离出双酚，并将含酚和碳酸二芳基酯的剩余混合物进行闪蒸。 蒸馏除去酚类和碳酸二芳基酯，并回收碳酸二芳基酯。
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公开(公告)号：US5900501A
公开(公告)日：1999-05-04
申请号：US799299
申请日：1997-02-13
CPC分类号： C07C68/02
摘要： The present invention relates to a process for the continuous production of carbonates having aromatic ester groups by the reaction of aromatic hydroxy compounds with phosgene in the presence of heterogeneous catalysts, phosgene still present being removed from the stream of waste gas by returning the waste gas to an additional reactor.
摘要翻译： 本发明涉及通过芳族羟基化合物与光气在多相催化剂的存在下连续生产具有芳族酯基的碳酸酯的方法，通过将废气返回到废气流中，仍然存在的光气从废气流中除去 一个额外的反应器。
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公开(公告)号：US5710310A
公开(公告)日：1998-01-20
申请号：US690332
申请日：1996-07-25
CPC分类号： C07C68/02
摘要： The present invention relates to a process for the continuous production of diaryl carbonates by reaction of aromatic hydroxy compounds with phosgene in the presence of heterogeneous catalysts.
摘要翻译： 本发明涉及通过芳族羟基化合物与光气在非均相催化剂存在下的反应连续制备碳酸二芳基酯的方法。
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10.发明授权Guanidine-derived catalyts for preparing polycarbonates by transesterification 失效用于通过酯交换制备聚碳酸酯的胍衍生的催化剂
公开(公告)号：US5418316A
公开(公告)日：1995-05-23
申请号：US257400
申请日：1994-06-09
申请人： Steffen Kuhling , Hermann Kauth , Wolfgang Alewelt
发明人： Steffen Kuhling , Hermann Kauth , Wolfgang Alewelt
CPC分类号： C08G64/307
摘要： The present invention provides a transesterification process for the production of thermoplastic, solvent-free polycarbonates by the use of catalysts that are derived from guanidine.
摘要翻译： 本发明提供了通过使用衍生自胍的催化剂制备热塑性无溶剂聚碳酸酯的酯交换方法。
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