-
1.发明授权
公开(公告)号：US4895919A
公开(公告)日：1990-01-23
申请号：US254742
申请日：1988-10-07
IPC分类号： C08G64/00 , C08G64/08 , C08G64/18 , C08G77/42 , C08G77/448
CPC分类号： C08G77/448 , C08G64/085
摘要： Copolysiloxanecarbonate compositions are prepared by the reaction of a carbonate precursor such as phosgene with a mixture of bisphenols including a spirobiindane bisphenol, at least one of said bisphenols containing polydiorganosiloxane moieties. The reaction may take place in one step or sequentially. The products are characterized by low processing temperature, low orientational birefringence and high ductility.
-
公开(公告)号：US5256728A
公开(公告)日：1993-10-26
申请号：US979738
申请日：1992-11-23
摘要： Pigmented polycarbonate compositions which are substantially stable with respect to molecular weight and melt viscosity are prepared by blending a redistributed polycarbonate with titanium dioxide free from polysiloxane coatings (i.e., "unpacified" titanium dioxide).
-
公开(公告)号：US5414057A
公开(公告)日：1995-05-09
申请号：US159691
申请日：1993-12-01
IPC分类号： C08G64/42 , C08F283/02
CPC分类号： C08G64/42
摘要： A process for the redistribution of an organic polycarbonate composition. The process involves melt equilibrating a starting polycarbonate composition (which may be a single polycarbonate or a mixture of polycarbonates, and may be or include recycled polycarbonate) having an initial weight average molecular weight in the presence of a carbonate redistribution catalyst and in the absence of branching agents, under conditions such that a redistributed polycarbonate composition is formed having a weight average molecular weight different from, and typically lower than, the initial weight.
摘要翻译： 一种有机聚碳酸酯组合物再分配的方法。 该方法包括在碳酸盐再分布催化剂的存在下熔融平衡起始聚碳酸酯组合物（其可以是单一聚碳酸酯或聚碳酸酯的混合物，并且可以是或包括再循环的聚碳酸酯），其具有初始重均分子量， 支化剂，在形成重新分布的聚碳酸酯组合物的条件下，其重均分子量不同于并且通常低于初始重量。
-
公开(公告)号：US4912189A
公开(公告)日：1990-03-27
申请号：US267860
申请日：1988-11-07
申请人： Gary R. Faler , David M. Dardaris
发明人： Gary R. Faler , David M. Dardaris
IPC分类号： C08G64/08 , C08G77/448
CPC分类号： C08G77/448 , C08G64/085
摘要： Spirobiindanol polydiorganosiloxane compounds are prepared by the reaction of an .alpha., .omega.-dichloropolydiorganosiloxane with a spirobiindane bisphenol in the presence of an acid acceptor. They are useful as intermediates in the preparation of copolysiloxanecarbonates.
摘要翻译： 螺二茚醇聚二有机硅氧烷化合物是通过α，ω-二氯聚二有机硅氧烷与螺二茚满双酚在酸受体存在下的反应来制备的。 它们可用作制备共聚硅氧烷碳酸酯的中间体。
-
公开(公告)号：US5459226A
公开(公告)日：1995-10-17
申请号：US280956
申请日：1994-07-27
CPC分类号： C08G64/42
摘要： The present invention is directed to a method for effecting the redistribution of polycarbonate and polycarbonate blends utilizing a tetraorganophosphonium carboxylate salt.
摘要翻译： 本发明涉及一种利用四有机鏻羧酸盐进行聚碳酸酯和聚碳酸酯共混物再分配的方法。
-
6.发明授权Optical quality polycarbonates with reduced static charge and method for making same 有权具有降低静电荷的光学质量聚碳酸酯及其制造方法公开(公告)号：US06262218B1
公开(公告)日：2001-07-17
申请号：US09450408
申请日：1999-11-29
申请人： Kazushige Inoue , Hiromi Ishida , Tomoaki Shimoda , Theodorus L. Hoeks , Henricus H. M. van Hout , Monica M. Marugan , David M. Dardaris , Patrick J. McCloskey
发明人： Kazushige Inoue , Hiromi Ishida , Tomoaki Shimoda , Theodorus L. Hoeks , Henricus H. M. van Hout , Monica M. Marugan , David M. Dardaris , Patrick J. McCloskey
IPC分类号： C08G6400
CPC分类号： C08G64/14 , C08G64/307 , G11B7/2534
摘要： Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.
摘要翻译： 将端盖水平提高到光学质量（OQ）的大约90％以上熔融聚碳酸酯显着降低了用于光盘应用的注塑部件的模制静电荷。 使用具有更高端帽水平的树脂与抗静电添加剂相结合提供了高度鲁棒的配方，适用于甚至最苛刻的新兴格式，如数字多功能光盘（DVD）和所有商业光学介质成型机。 因此，通过在有效地制备端帽水平为90％以上的聚碳酸酯制品的条件下进行碳酸二芳基酯和二元酚的碱催化聚合来制备光学质量的聚碳酸酯。
-
7.发明授权Branched polycarbonate preforms, blow moldable polycarbonate and method for making 失效分支聚碳酸酯预制件，可吹塑聚碳酸酯和制造方法
公开(公告)号：US5597887A
公开(公告)日：1997-01-28
申请号：US501898
申请日：1995-08-09
摘要： Blow moldable polycarbonate is produced by first producing a polycarbonate preform by a melt transesterification process. The polycarbonate preform comprises 2.1 to 10 mole percent polyfunctional branching agent, based on the total moles of polycarbonate in the polycarbonate preform. The polycarbonate preform is then melt equilibrated with a second polycarbonate to produce a blow moldable grade.
摘要翻译： 可吹塑聚碳酸酯通过首先通过熔融酯交换法生产聚碳酸酯预成型体来制造。 基于聚碳酸酯预成型体中的聚碳酸酯的总摩尔数，聚碳酸酯预制件包含2.1至10摩尔％的多官能支化剂。 然后将聚碳酸酯预成型件与第二聚碳酸酯熔融平衡以产生可吹塑级。
-
8.发明授权Aromatic polycarbonates having polyfunctional UV screening units, method for making and use 失效具有多官能UV筛选单元的芳族聚碳酸酯，制备和使用方法
公开(公告)号：US5556936A
公开(公告)日：1996-09-17
申请号：US341240
申请日：1994-11-17
申请人： Joseph A. King, Jr. , Patrick J. McCloskey , Alice M. Colley , David M. Dardaris , Luca P. Fontana , Josef G. Berndsen
发明人： Joseph A. King, Jr. , Patrick J. McCloskey , Alice M. Colley , David M. Dardaris , Luca P. Fontana , Josef G. Berndsen
CPC分类号： C08G64/12 , Y10T428/31507
摘要： UV stabilized polycarbonates are provided having chemically combined polyhydric phenol benzotriazole carbonate units, such as 1,1-bis(4-hydroxyphenyl)-1-[4-hydroxy-3-(N-2-benzotriazole)phenyl]ethane carbonate units and methods for making. Incorporation of the polyhydric phenol benzotriazole functional units into the polycarbonate backbone can be achieved by redistribution or transesterification under melt polymerization conditions.
摘要翻译： 提供具有化学结合的多元酚苯并三唑碳酸酯单元如1,1-双（4-羟基苯基）-1- [4-羟基-3-（N-2-苯并三唑）苯基]乙烷碳酸酯单元和方法的紫外线稳定化聚碳酸酯 制作。 通过在熔融聚合条件下的再分配或酯交换可以将多羟基苯并三唑功能单元并入聚碳酸酯骨架中。
-
9.发明授权Optical quality polycarbonates with reduced static charge and method for making same 有权具有降低静电荷的光学质量聚碳酸酯及其制造方法
公开(公告)号：US6022943A
公开(公告)日：2000-02-08
申请号：US287668
申请日：1999-04-07
申请人： Kazushige Inoue , Hiromi Ishida , Tomoaki Shimoda , Theodorus L. Hoeks , Henricus H. M. van Hout , Monica M. Marugan , David M. Dardaris , Patrick J. McCloskey
发明人： Kazushige Inoue , Hiromi Ishida , Tomoaki Shimoda , Theodorus L. Hoeks , Henricus H. M. van Hout , Monica M. Marugan , David M. Dardaris , Patrick J. McCloskey
CPC分类号： C08G64/14 , C08G64/307 , G11B7/2534
摘要： Increasing the endcap level to a level greater than about 90% for Optical Quality (OQ) Melt Polycarbonate significantly reduces the as-molded static charge for injection molded parts for Optical Disc applications. The use of resins with higher endcap levels in combination with antistatic additives provides a highly robust formulation suitable for even the most demanding emerging formats as Digital Versatile Disc (DVD) and in all commercial Optical media molding machines. Thus, optical quality polycarbonates are prepared by performing a base-catalyzed polymerization of a diaryl carbonate and a dihydric phenol under conditions effective to produce a polycarbonate product having an endcap level of 90% or greater.
摘要翻译： 将端盖水平提高到光学质量（OQ）的大约90％以上熔融聚碳酸酯显着降低了用于光盘应用的注塑部件的模制静电荷。 使用具有更高端帽水平的树脂与抗静电添加剂相结合提供了高度鲁棒的配方，适用于甚至最苛刻的新兴格式，如数字多功能光盘（DVD）和所有商业光学介质成型机。 因此，通过在有效地制备端帽水平为90％以上的聚碳酸酯制品的条件下进行碳酸二芳基酯和二元酚的碱催化聚合来制备光学质量的聚碳酸酯。
-
10.发明授权Method for improving catalyst efficiency during polycarbonate redistribution 失效在聚碳酸酯再分配过程中提高催化剂效率的方法
公开(公告)号：US5521275A
公开(公告)日：1996-05-28
申请号：US523666
申请日：1995-09-05
CPC分类号： C08G64/42 , B29C67/246 , B29C47/00 , B29C47/0009
摘要： The efficiency of a redistribution catalyst during polycarbonate redistribution is improved by employing an extruder screw design that provides a melt seal between the extruder throat and the vacuum port. A melt seal exists when the free volume within the extruder is sufficiently filled with molten resin so as to prevent the passage of gases between sections of the extruder.
摘要翻译： 通过采用在挤出机喉部和真空端口之间提供熔体密封的挤出机螺杆设计来改善聚碳酸酯再分布期间再分布催化剂的效率。 当挤出机内的自由体积被熔融树脂充分填充以防止气体在挤出机的两段之间通过时，存在熔体密封。
-
-
-
-
-
-
-
-
-
搜索结果
10 条记录 (耗时 0.017 秒)