利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

51 条记录 (耗时 0.04 秒)

    Interfacial method for preparing copolyestercarbonates
    42.
    发明授权
    Interfacial method for preparing copolyestercarbonates 失效
    共聚酯碳酸酯的界面方法

    公开(公告)号：US06117968A

    公开(公告)日：2000-09-12

    申请号：US996898

    申请日：1997-12-23

    申请人： Gary Charles Davis ,  Niles Richard Rosenquist ,  Paul Dean Sybert

    发明人： Gary Charles Davis ,  Niles Richard Rosenquist ,  Paul Dean Sybert

    IPC分类号： C08G63/64 ,  C08G63/79 ,  C08G64/00

    CPC分类号： C08G63/64 ,  C08G63/79

    摘要： The level of anhydride linkages in copolyestercarbonates is decreased by preparing the copolyestercarbonate interfacially in a two-step method from at least one dihydroxyaromatic compound and at least one dicarboxylic acid. The first step is conducted at a pH in the range of about 4.5-9.5, employing the combination of a phase transfer catalyst such as a tetraalkylammonium halide and a tertiary amine such as triethylamine. The proportion of the phase transfer catalyst is in the range of about 3-12 mole percent based on total dihydroxyaromatic compound and dicarboxylic acid employed. In the second phosgenation step, the pH is raised to at least 10 and a stoichiometric phosgene excess of at least 5% is introduced.

    摘要翻译： 通过以两步法从至少一种二羟基芳族化合物和至少一种二羧酸制备共聚酯碳酸酯，共聚酯碳酸酯中的酸酐键的水平降低。 第一步是使用相转移催化剂如四烷基卤化铵和叔胺如三乙胺的组合，在约4.5-9.5的pH范围内进行。 相转移催化剂的比例在所用二羟基芳族化合物和二羧酸的总量的范围内为约3-12摩尔％。 在第二次光气化步骤中，将pH提高至至少10，并引入至少5％的化学计量光气过量。

    Method for preparation of copolyorganosiloxanecarbonates of high clarity
    47.
    发明授权
    Method for preparation of copolyorganosiloxanecarbonates of high clarity 有权
    制备高透明度的共聚有机硅氧烷的方法

    公开(公告)号：US06870013B2

    公开(公告)日：2005-03-22

    申请号：US10638622

    申请日：2003-08-08

    申请人： James Manio Silva ,  David Michel Dardaris ,  Gary Charles Davis

    发明人： James Manio Silva ,  David Michel Dardaris ,  Gary Charles Davis

    IPC分类号： C08G64/18 ,  C08G64/24 ,  C08G77/448 ,  C08G77/04

    CPC分类号： C08G77/448 ,  C08G64/186 ,  C08G64/24 ,  C08G77/24 ,  C08G77/80

    摘要： Copolyorganosiloxanecarbonates are prepared by first preparing an oligomeric aromatic polycarbonate, such as an oligomeric bisphenol A polycarbonate, in the presence of a tertiary amine as the only catalyst species; contacting the oligomeric polycarbonate mixture with a polyorganosiloxane bis(aryl)chloroformate, such as the bischloroformate of hydroxy-terminated eugenol polydimethylsiloxane; and introducing phosgene and/or chain termination agent either continuously or in stages. A feature of the process is the presence of dihydroxyaromatic compound in only one charge, at the beginning. The products have excellent physical properties, including transparency.

    摘要翻译： 通过在叔胺作为唯一的催化剂种存在下首先制备低聚芳族聚碳酸酯如低聚双酚A聚碳酸酯来制备共聚有机硅氧烷， 使低聚聚碳酸酯混合物与聚有机硅氧烷二（芳基）氯甲酸酯接触，例如羟基封端的丁子香酚聚二甲基硅氧烷的双氯甲酸酯; 并连续或分阶段引入光气和/或链终止剂。 该方法的特征是在开始时仅在一次充电中存在二羟基芳族化合物。 该产品具有优异的物理性能，包括透明度。

    Method of making silicone copolycarbonates having random and blocky substructures
    48.
    发明授权
    Method of making silicone copolycarbonates having random and blocky substructures 失效
    制备具有随机和嵌段亚结构的硅氧烷共聚碳酸酯的方法

    公开(公告)号：US06780956B2

    公开(公告)日：2004-08-24

    申请号：US10261911

    申请日：2002-10-02

    申请人： Gary Charles Davis

    发明人： Gary Charles Davis

    IPC分类号： C08G77448

    CPC分类号： C08G64/1666 ,  C08G64/085 ,  C08G64/186 ,  C08G77/448 ,  G11B7/2534 ,  G11B7/2535

    摘要： The invention relates to a method of preparing silicone copolycarbonates which incorporate both blocky and random substructures. Such silicone-containing copolycarbonates are useful in the preparation of a variety of molded articles such as optical disks. The structure of the compositions prepared by the method of the invention is determined by the method of preparation used and may be used to control physical properties. The copolymers are prepared by forming in a first step an intermediate silicone copolycarbonate possessing either a blocky or random structure and reactive endgroups, and then appending additional structural in a second step which is complimentary to the first step and produces a product silicone copolycarbonate having both random and blocky substructures. The repeat units I and II appended in the second step may be the same or different as those repeat units I and II incorporated in the first step.

    摘要翻译： 本发明涉及一种制备掺入块状和随机亚结构的硅氧烷共聚碳酸酯的方法。 这种含有机硅的共聚碳酸酯可用于制备各种模塑制品如光盘。 通过本发明方法制备的组合物的结构由所用的制备方法确定，并可用于控制物理性质。 共聚物通过在第一步骤中形成具有块状或无规结构的中间体硅氧烷共聚碳酸酯和反应性端基，然后在与第一步相互补充的第二步中附加另外的结构，并产生具有两个随机的产物硅酮共聚碳酸酯 和块状亚结构。 在第二步中附加的重复单元I和II可以与在第一步骤中结合的重复单元I和II相同或不同。

    Siloxane bischloroformates
    49.
    发明授权
    Siloxane bischloroformates 有权

    公开(公告)号：US06723864B2

    公开(公告)日：2004-04-20

    申请号：US10223030

    申请日：2002-08-16

    申请人： James Manio Silva ,  David Michel Dardaris ,  Gary Charles Davis

    发明人： James Manio Silva ,  David Michel Dardaris ,  Gary Charles Davis

    IPC分类号： G07F718

    CPC分类号： C08G77/06 ,  C08G77/24

    摘要： Siloxane bischloroformates are prepared in a continuous process by phosgenating siloxane bisphenols in a flow reactor using a substantial excess of phosgene and sodium hydroxide. While very high levels (>95%) of conversion of the siloxane bisphenol to the corresponding siloxane bischloroformate are achieved using a flow reactor according to the method of the invention, only more modest conversion (˜90%) of the siloxane bisphenol to the corresponding siloxane bischloroformate is attained when analogous batch processes are employed. The process holds promise for use in the manufacture of silicone-containing copolycarbonates which requires high purity siloxane bischloroformate intermediates.