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    Method of polycarbonate preparation by solid state polymerization
    3.
    发明授权
    Method of polycarbonate preparation by solid state polymerization 失效
    通过固态聚合制备聚碳酸酯的方法

    公开(公告)号：US06518391B1

    公开(公告)日：2003-02-11

    申请号：US09911505

    申请日：2001-07-24

    申请人： Patrick Joseph McCloskey ,  James Day ,  Paul Michael Smigelski, Jr. ,  Timothy Brydon Burnell

    发明人： Patrick Joseph McCloskey ,  James Day ,  Paul Michael Smigelski, Jr. ,  Timothy Brydon Burnell

    IPC分类号： C08G6400

    CPC分类号： C08G64/307 ,  C08G64/06

    摘要： Solid state polymerization of partially crystalline polycarbonate oligomers bearing ester-substituted terminal groups occurs at useful reaction rates despite their high level of endcapping. Partially crystalline polycarbonate oligomers having ester substituted terminal groups may be obtained in a single step by reaction of an ester substituted diaryl carbonate such as bis-methyl salicyl carbonate with a dihydroxy aromatic compound such as bisphenol A in the presence of a transesterification catalyst such as sodium hydroxide. Alternatively, amorphous oligomeric polycarbonates incorporating ester substituted endgroups may be obtained through careful control of the melt reaction conditions. The amorphous oligomeric polycarbonates are crystallized upon exposure to solvent vapor and subsequently undergo solid state polymerization at synthetically useful reaction rates.

    摘要翻译： 带有酯取代的端基的部分结晶的聚碳酸酯低聚物的固态聚合以有效的反应速率发生，尽管它们具有高水平的封端。 具有酯取代的末端基的部分结晶的聚碳酸酯低聚物可以通过酯交换催化剂如钠的存在下，酯取代的碳酸二碳酸酯如碳酸双甲基酯与二羟基芳族化合物如双酚A的反应在一个步骤中获得 氢氧化物。 或者，可以通过仔细控制熔融反应条件来获得引入酯取代的端基的无定形低聚聚碳酸酯。 无定形低聚聚碳酸酯在暴露于溶剂蒸气下结晶，随后在合成有用的反应速率下进行固态聚合。

    Method for preparing high molecular weight polycarbonate
    5.
    发明授权
    Method for preparing high molecular weight polycarbonate 有权
    制备高分子量聚碳酸酯的方法

    公开(公告)号：US06228973B1

    公开(公告)日：2001-05-08

    申请号：US09584984

    申请日：2000-06-02

    申请人： Patrick Joseph McCloskey ,  Timothy Brydon Burnell ,  Paul Michael Smigelski, Jr. ,  Johan Pieter Anna Heuts ,  Hendricus Franciscus Zirkzee

    发明人： Patrick Joseph McCloskey ,  Timothy Brydon Burnell ,  Paul Michael Smigelski, Jr. ,  Johan Pieter Anna Heuts ,  Hendricus Franciscus Zirkzee

    IPC分类号： C08G6400

    CPC分类号： C08G64/307

    摘要： A method of preparing polycarbonate by the melt process comprising the steps of: a) melting a dihydric phenol and a diester of carbonic acid for a time and at a temperature sufficient to form a melt; and thereafter introducing a catalyst composition comprising a tetraorganophosphonium salt or a derivative thereof and 1) an alkali and/or alkali earth metal compound or derivative thereof or 2) a less active alkali and/or alkali earth metal derivative thereof into the melt; and b) oligomerizing the product from step a) to a number average molecular weight of from about 3000 to about 7500; and c) polymerizing the product from step b) to a number average molecular weight of from about 16,000 to about 35,000.

    摘要翻译： 通过熔融法制备聚碳酸酯的方法包括以下步骤：a）在足以形成熔体的时间和温度下熔化二元酚和碳酸二酯; 然后引入含有四有机鏻盐或其衍生物的催化剂组合物，和1）碱金属和/或碱土金属化合物或其衍生物，或2）其活性较低的碱金属和/或碱土金属衍生物; 和b）使来自步骤a）的产物低聚至约3000至约7500的数均分子量; 和c）将来自步骤b）的产物聚合至数均分子量为约16,000至约35,000。

    Interfacial method of preparing ester-substituted diaryl carbonates
    9.
    发明授权
    Interfacial method of preparing ester-substituted diaryl carbonates 有权
    制备酯取代的碳酸二芳基酯的界面方法

    公开(公告)号：US06420588B1

    公开(公告)日：2002-07-16

    申请号：US09911440

    申请日：2001-07-24

    申请人： Patrick Joseph McCloskey ,  Timothy Brydon Burnell ,  Daniel Joseph Brunelle ,  Elliott West Shanklin ,  Paul Michael Smigelski, Jr. ,  Ganesh Kailasam

    发明人： Patrick Joseph McCloskey ,  Timothy Brydon Burnell ,  Daniel Joseph Brunelle ,  Elliott West Shanklin ,  Paul Michael Smigelski, Jr. ,  Ganesh Kailasam

    IPC分类号： C07C6996

    CPC分类号： C07C68/02 ,  C07C69/96

    摘要： High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of methyl salicylate with phosgene in the presence of a phase transfer catalyst (PTC) in an interfacial reaction system in which the pH of the aqueous phase was greater than 9.3. Using the method of the present invention conversions of greater than 99% were obtained whereas under standard conditions using triethylamine as the catalyst conversions were limited to 70-75% of the methyl salicylate starting material even with a 20 mole % excess of added phosgene. The optimized conditions of the of the present invention use only a slight excess of phosgene and represent an attractive route for the manufacture of bis methyl salicyl carbonate and ester-substituted diaryl carbonates generally.

    摘要翻译： 通过在界面反应体系中存在相转移催化剂（PTC）的情况下，通过水杨酸甲酯与光气的缩合得到高产率的酯取代的二元碳酸酯，其中水相的pH为 大于9.3。 使用本发明的方法获得大于99％的转化率，而在使用三乙胺的标准条件下，即使使用20摩尔％过量的加入的光气，催化剂转化率也限于水杨酸甲酯起始原料的70-75％。 本发明的优化条件仅使用轻微过量的光气，并且代表通常用于制造碳酸双甲基水杨酸酯和酯取代的二芳基碳酸酯的有吸引力的途径。