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    Single-step method for preparing polycarbonates from bischloroformates
    1.
    发明授权
    Single-step method for preparing polycarbonates from bischloroformates 失效
    从双氯甲酸酯制备聚碳酸酯的单步法

    公开(公告)号：US5034505A

    公开(公告)日：1991-07-23

    申请号：US559130

    申请日：1990-07-27

    申请人： James M. Silva ,  Thomas J. Fyvie

    发明人： James M. Silva ,  Thomas J. Fyvie

    IPC分类号： C08G64/14 ,  C08G64/26

    CPC分类号： C08G64/26 ,  C08G64/14

    摘要： Aromatic bischloroformate compositions are interfacially converted to polycarbonates in a single step which includes capping with a monohydroxyaromatic compound. The reaction is conducted by adding an interfacial polycarbonate formation catalyst such as triethylamine and incrementally adding a base such as aqueous sodium hydroxide solution, without pH control, until the reaction mixture is non-emulsified. The amount of base to be added without pH control may be determined by titration. Further base is then added as necessary to provide a pH in the range of about 10-13.

    Low phosgene method for preparing aromatic bischloroformates
    3.
    发明授权
    Low phosgene method for preparing aromatic bischloroformates 失效
    制备芳香双氯甲酸酯的低光气法

    公开(公告)号：US5011966A

    公开(公告)日：1991-04-30

    申请号：US222879

    申请日：1988-07-22

    申请人： James M. Silva ,  Thomas J. Fyvie

    发明人： James M. Silva ,  Thomas J. Fyvie

    IPC分类号： C07C68/02 ,  C07C69/96

    CPC分类号： C07C69/96 ,  C07C68/02

    摘要： Aromatic bischloroformates are prepared by the reaction of a dihydroxyaromatic compound such as bisphenol A with phosgene in the presence of water, base and an organic liquid such as methylene chloride. Initially, a mixture of the bisphenol, organic liquid and about 5-15% of the total base is prepared, and phosgene is passed into said mixture. The remainder of the base is added initially at a constant rate, and then only when the measured pH of the aqueous mixture is below a targeted value in the range of about 8-11 and in about 5-10% excess with respect to the phosgene then being introduced. This method minimizes hydrolysis of phosgene and formation of such by-products as monochloroformates and hydroxy-terminated polycarbonate oligomers.

    Process for continuous preparation of polyphenylene oxide in agitated reaction zones
    4.
    发明授权
    Process for continuous preparation of polyphenylene oxide in agitated reaction zones 失效
    在搅拌反应区中连续制备聚苯醚的方法

    公开(公告)号：US4675377A

    公开(公告)日：1987-06-23

    申请号：US848557

    申请日：1986-04-07

    申请人： David P. Mobley ,  Thomas J. Fyvie

    发明人： David P. Mobley ,  Thomas J. Fyvie

    IPC分类号： C08G65/44

    CPC分类号： C08G65/44

    摘要： Polyphenylene oxides are prepared by the catalytic reaction of oxygen with a monohydroxyaromatic compound such as 2,6-xylenol in a continuous-flow tubular reactor containing multiple agitated zones. In the case of a copper catalyst system, it is often preferred to pre-mix the non-gaseous constituents of the reaction mixture in an inert atmosphere, and also to use a reactor with various agitator and zone dimensions in various regions.

    摘要翻译： 聚苯醚通过在含有多个搅拌区域的连续流动的管式反应器中通过氧与单羟基芳族化合物如2,6-二甲苯酚的催化反应来制备。 在铜催化剂体系的情况下，通常优选在惰性气氛中预混合反应混合物的非气态成分，并且还可以在各种区域中使用具有各种搅拌器和区域尺寸的反应器。

    Method for making oligomeric carbonate bischloroformates with low phosgene usage
    6.
    发明授权
    Method for making oligomeric carbonate bischloroformates with low phosgene usage 失效
    用于制造具有低PHOSGENE用途的低碳碳酸盐双歧杆菌的方法

    公开(公告)号：US5162564A

    公开(公告)日：1992-11-10

    申请号：US331787

    申请日：1989-04-03

    申请人： James M. Silva ,  Thomas J. Fyvie

    发明人： James M. Silva ,  Thomas J. Fyvie

    IPC分类号： C08G64/24 ,  C07C68/02 ,  C07C69/96 ,  C08G64/20 ,  C08G64/22

    CPC分类号： C07C69/96 ,  C07C68/02

    摘要： Oligomeric carbonate bischloroformates are prepared with low phosgene usage by phosgenating a dihydroxyaromatic compound in an interfacial reaction in the presence of small amounts of trialkylamine, preferably, triethylamine. In this invention, the molar ratio of phosgene to dihydroxyaromatic compound, hydrolysis of phosgene, formation of such byproducts as monochloroformates and hydroxyl-terminated polycarbonate oligomers, and batch time are minimized and consumption of the dihydroxylaromatic compound is substantially complete.

    摘要翻译： 在少量三烷基胺，优选三乙胺的存在下，在界面反应中光化二羟基芳族化合物，通过低光气使用制备低聚碳酸酯双氯甲酸酯。 在本发明中，光气与二羟基芳族化合物的摩尔比，光气的水解，形成一氯甲酸酯和羟基封端的聚碳酸酯低聚物的副产物和批次时间最小化，二羟基芳族化合物的消耗基本上完成。

    Method for making oligomeric bisphenol monochloroformate polycarbonate oligomers and product
    7.
    发明授权
    Method for making oligomeric bisphenol monochloroformate polycarbonate oligomers and product 失效
    制备低聚双酚一氯甲酸酯聚碳酸酯低聚物和产品的方法

    公开(公告)号：US5214183A

    公开(公告)日：1993-05-25

    申请号：US754486

    申请日：1991-09-03

    申请人： Thomas J. Fyvie ,  James M. Silva

    发明人： Thomas J. Fyvie ,  James M. Silva

    IPC分类号： C08G64/24

    CPC分类号： C08G64/24

    摘要： A process for making bisphenol monochloroformate polycarbonate oligomers is provided by continuously introducing phosgene into a bisphenol mixture under agitated interfacial conditions. The pH of the phosgenation mixture falls below a predetermined value, thereby effecting the introduction of an aqueous alkali hydroxide consistent with the use of particular base introduction control systems. In accordance with the use of such control systems, the pH of the mixture can be stabilized, and the phosgenation and base introduction terminated when the pH of the mixture suddenly dips at least about 1 pH unit, or a sudden increase in the flow rate of aqueous alkali metal hydroxide is noted after a plateau in the rate of base introduction.

    摘要翻译： 通过在搅拌的界面条件下将光气连续引入双酚混合物中来提供制备双酚一氯甲酸酯聚碳酸酯低聚物的方法。 光气化混合物的pH低于预定值，由此引入与使用特定碱引入控制体系一致的碱性氢氧化碱水溶液。 根据这种控制系统的使用，可以使混合物的pH稳定，并且当混合物的pH突然下降至少约1个pH单位时，光气化和碱的引入终止，或者流速的突然增加 碱性金属氢氧化物水溶液在碱性引入速率达到平稳之后。