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19 条记录 (耗时 0.029 秒)

    Compounds of antimony and germanium as catalysts for melt polycarbonate
    13.
    发明授权
    Compounds of antimony and germanium as catalysts for melt polycarbonate 失效
    锑和锗的化合物作为熔融聚碳酸酯的催化剂

    公开(公告)号：US06610814B2

    公开(公告)日：2003-08-26

    申请号：US10007347

    申请日：2001-10-25

    申请人： John Patrick Lemmon ,  Oltea Puica Siclovan

    发明人： John Patrick Lemmon ,  Oltea Puica Siclovan

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of antimony oxides or germanium oxides in combination with tetraalkyl ammonium or tetraalkyl phosphonium compounds which serve as co-catalysts. The antimony oxide derivative “tartar emetic”, structure IV, was shown to possess excellent activity as a transesterifcation catalyst for the preparation of polycarbonate under melt polymerization conditions. The catalysts employed according to the method of the present invention provide polycarbonates having substantial molecular weight (Mn˜7000-10000 daltons) and reduced levels of Fries rearrangement product relative to conventionally prepared melt polycarbonate having a similar molecular weight.

    摘要翻译： 本发明涉及在熔融聚合条件下，在酯交换催化剂存在下，使一种或多种碳酸二芳基酯与一种或多种二羟基芳族化合物反应以得到产物聚碳酸酯的合成方法。 根据本发明方法使用的酯交换催化剂是用作助催化剂的四烷基铵或四烷基鏻化合物的氧化锑或氧化锗的碱金属盐和碱土金属盐。 显示结构IV的氧化锑衍生物“鞑靼呕吐物”在熔融聚合条件下作为用于制备聚碳酸酯的酯交换催化剂具有优异的活性。 根据本发明的方法使用的催化剂相对于具有相似分子量的常规制备的熔融聚碳酸酯提供具有相当大分子量（Mn〜7000-10000道尔顿）的聚碳酸酯和降低的Fries重排产物含量。

    Salts of organic polyacids as polymerization catalysts
    15.
    发明授权
    Salts of organic polyacids as polymerization catalysts 失效
    有机多元酸作为聚合催化剂的盐

    公开(公告)号：US06569986B1

    公开(公告)日：2003-05-27

    申请号：US10007228

    申请日：2001-10-25

    申请人： John Patrick Lemmon ,  Ronald James Wroczynski ,  Oltea Puica Siclovan

    发明人： John Patrick Lemmon ,  Ronald James Wroczynski ,  Oltea Puica Siclovan

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are alkali metal salts and alkaline earth metal salts of organic polyacids in combination with tetraalkyl ammonium or tetraalkyl phosphonium compounds which serve as co-catalysts. The transesterification catalysts are derived from polyacids containing both CO2H groups and SO3H groups and from polyacids containing exclusively CO2H groups or exclusively SO3H groups. The catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide.

    摘要翻译： 本发明涉及一种合成方法，其包括在熔融聚合条件下在酯基转移催化剂存在下使至少一种碳酸二芳基酯与一种或多种二羟基芳族化合物接触，得到产物聚碳酸酯。 根据本发明方法使用的酯交换催化剂是作为助催化剂的四烷基铵或四烷基鏻化合物的有机多酸的碱金属盐和碱土金属盐。 酯交换催化剂衍生自含有CO 2 H基团和SO 3 H基团的多酸和仅含有CO 2 H基团或仅含有SO 3 H基团的多酸。 根据本发明的方法使用的催化剂提供了相对于常规使用的催化剂如氢氧化钠具有降低的Fries重排产物含量的聚碳酸酯。

    Melt polycarbonate catalyst systems
    18.
    发明授权
    Melt polycarbonate catalyst systems 失效
    熔融聚碳酸酯催化剂体系

    公开(公告)号：US06376640B1

    公开(公告)日：2002-04-23

    申请号：US09760100

    申请日：2001-01-12

    申请人： John Patrick Lemmon ,  Patrick Joseph McCloskey ,  Oltea Puica Siclovan

    发明人： John Patrick Lemmon ,  Patrick Joseph McCloskey ,  Oltea Puica Siclovan

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts of the formula Cs+An−, wherein An− represents anions such as CH3SO3−, NH2SO3−, C2H2O4−, BF4−, B(C6H5CH3)4−, and CH3C6H4SO3−. We have found that this new class of catalysts provides excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.

    摘要翻译： 本发明提供一种制备聚碳酸酯的方法，该方法采用式为Cs + An-的缩聚催化剂，其中An-表示阴离子如CH 3 SO 3 - ，NH 2 SO 3 - ，C 2 H 2 O 4 - ，BF 4 - ，B（C 6 H 5 CH 3）4 - 和CH 3 C 6 H 4 SO 3 - 。 我们已经发现，这种新型催化剂由于碳酸二苯酯和双酚A的熔融聚合而提供了用于制备双酚A聚碳酸酯的优异的聚合速率。此外，发现本发明的催化剂在显着降低 分支侧反应，即通常与熔融聚碳酸酯方法相关的Fries产物的形成。

    Melt polycarbonate catalyst systems
    19.
    发明授权
    Melt polycarbonate catalyst systems 有权
    熔融聚碳酸酯催化剂体系

    公开(公告)号：US06323304B1

    公开(公告)日：2001-11-27

    申请号：US09760086

    申请日：2001-01-12

    申请人： John Patrick Lemmon ,  Patrick Joseph McCloskey ,  Oltea Puica Siclovan

    发明人： John Patrick Lemmon ,  Patrick Joseph McCloskey ,  Oltea Puica Siclovan

    IPC分类号： C08G6378

    CPC分类号： C08G64/307

    摘要： This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts of the formula Ax+MF6−x, wherein A is an alkali metal or alkaline earth cation; M is a transition metal of group IVA or VA, or M is a p-block metal of group IIIB, IVB or VB; and x is 1, 2, or 3. We have found that this new class of catalysts provide excellent polymerization rates for the preparation of Bisphenol A polycarbonate from the melt polymerization of diphenyl carbonate and Bisphenol A. Moreover, the catalysts of the invention were found to be very selective in substantially reducing the level of branching side reaction, i.e., formation of Fries product, normally associated with the melt polycarbonate process.

    摘要翻译： 本发明提供一种制备聚碳酸酯的方法，其使用式Ax + MF6-x的缩聚催化剂，其中A为碱金属或碱土金属阳离子; M是IVA或VA族的过渡金属，或M是IIIB，IVB或VB族的p型金属; 我们已经发现，这种新型催化剂从碳酸二苯酯和双酚A的熔融聚合制备双酚A聚碳酸酯提供了极好的聚合速率。此外，发现了本发明的催化剂 在大大降低支化反应的水平方面非常有选择性，即通常与熔融聚碳酸酯方法相关的Fries产物的形成。