Low permeability nanocomposites
    52.
    发明申请
    Low permeability nanocomposites 有权
    低渗透性纳米复合材料

    公开(公告)号:US20050027058A1

    公开(公告)日:2005-02-03

    申请号:US10478606

    申请日:2002-05-29

    摘要: The present invention includes blends of a halogenated elastomer such as a butyl rubber or an interpolymer of, on one embodiment, a C4 to C7 isomonoolefin, a para-methylstyrene and a para-(halomethylstyrene), the interpolymer having been pre-mixed with an exfoliating compound and clay, the entire blend forming a nanocomposite in one embodiment. The clay may or may not have undergone an additional exfoliating treatment prior to blending with the halogenated elastomer. The interpolymer/clay mixture forms a distinct phase in the nanocomposite blend of the invention. The blend of the invention has improved air barrier properties and is suitable as an air barrier.

    摘要翻译: 本发明包括卤化弹性体如丁基橡胶或在一个实施方案中为C4至C7异单烯烃,对甲基苯乙烯和对 - (卤代甲基苯乙烯)的互聚物的共混体,该互聚物已经与 去角质化合物和粘土,在一个实施方案中,整个共混物形成纳米复合材料。 在与卤化弹性体共混之前,粘土可以或可以不经历额外的去角质处理。 互聚物/粘土混合物在本发明的纳米复合材料混合物中形成不同的相。 本发明的共混物具有改善的空气阻隔性能,并且适合作为空气屏障。

    Branched semi-crystalline high-C3 ethylene-propylene polymer compositions
    53.
    发明授权
    Branched semi-crystalline high-C3 ethylene-propylene polymer compositions 有权
    支链半结晶高C3乙烯 - 丙烯聚合物组合物

    公开(公告)号:US06569965B2

    公开(公告)日:2003-05-27

    申请号:US10278666

    申请日:2002-10-23

    IPC分类号: C08F464

    摘要: Branched ethylene-propylene compositions which have improved melt strength and shear thinning are provided. The weight average branching index g′ for the higher molecular weight region of the ethylene-propylene composition is less than 0.95. Additionally, a novel process is provided for efficiently producing a branched ethylene-propylene composition comprising: a) contacting propylene monomers and ethylene monomers in a reactor with an inert hydrocarbon solvent or diluent and a catalyst composition comprising one or more single site catalyst compounds capable of producing an ethylene-propylene polymer at a temperature from about 50° C. to about 180° C., wherein the ratio in the reactor of the propylene and ethylene monomers to the inert hydrocarbon solvent or diluent is less than 2.0, and further, wherein the propylene and ethylene monomers and the inert hydrocarbon solvent or diluent comprise no more than 90 percent of the total contents of the reactor; and b) recovering a branched ethylene-propylene composition, wherein the weight average branching index g′ for the higher molecular weight region of the ethylene-propylene composition is less than 0.95.

    摘要翻译: 提供了具有改善的熔体强度和剪切稀化的分支乙烯 - 丙烯组合物。 乙烯 - 丙烯组合物的较高分子量区域的重均分支指数g'小于0.95。 另外,提供了一种有效生产支化乙烯 - 丙烯组合物的新方法,其包括:a)使反应器中的丙烯单体和乙烯单体与惰性烃溶剂或稀释剂和包含一种或多种单中心催化剂化合物的催化剂组合物接触, 在约50℃至约180℃的温度下生产乙烯 - 丙烯聚合物,其中丙烯和乙烯单体的反应器与惰性烃溶剂或稀释剂的比例小于2.0,此外,其中 丙烯和乙烯单体和惰性烃溶剂或稀释剂不超过反应器总含量的90%; 和b)回收支链乙烯 - 丙烯组合物,其中乙烯 - 丙烯组合物的较高分子量区域的重均分支指数g'小于0.95。

    Propylene polymers incorporating macromers
    54.
    发明授权
    Propylene polymers incorporating macromers 失效
    掺入大分子单体的丙烯聚合物

    公开(公告)号:US06197910B1

    公开(公告)日:2001-03-06

    申请号:US09020306

    申请日:1998-02-06

    IPC分类号: C08F11006

    摘要: A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, repeating units of one or more comonomers, wherein the total comonomer repeating unit content of the polyolefin composition is from 0 to 20 mole percent, and further, wherein the weight average branching index g′ for the lower molecular weight region of the polyolefin composition is less than 0.93. Additionally, a process is provided for producing a polyolefin composition comprising: a) contacting, in solution, at a temperature from about 90° C. to about 120° C., propylene monomers with a catalyst composition comprising a first chiral, stereorigid transition metal catalyst compound capable of producing isotactic polypropylene; b) copolymerizing the product of a) with propylene and, optionally, one or more copolymerizable monomers, in a polymerization reactor under suitable polypropylene polymerization conditions using a second chiral, stereorigid transition metal catalyst capable of producing isotactic polypropylene; and c) recovering a branched olefin polymer.

    摘要翻译: 提供了聚烯烃组合物,其基本上由全同立构聚丙烯和任选的一种或多种共聚单体的重复单元组成,其中聚烯烃组合物的总共聚单体重复单元含量为0至20摩尔%,此外,其中重均分子量 聚烯烃组合物的较低分子量区域的指数g'小于0.93。 此外,提供了一种用于制备聚烯烃组合物的方法,其包括:a)在约90℃至约120℃的温度下在溶液中使丙烯单体与催化剂组合物接触,所述催化剂组合物包含第一手性立体刚性过渡金属 能够产生全同立构聚丙烯的催化剂化合物; b)在合适的聚丙烯聚合条件下,使用能够产生全同立构的第二手性立体刚性过渡金属催化剂,在聚合反应器中将a)的产物与丙烯和任选的一种或多种可共聚的单体共聚 聚丙烯; 和c)回收支链烯烃聚合物。

    Elastomeric nanocomposite manufacturing
    58.
    发明授权
    Elastomeric nanocomposite manufacturing 有权
    弹性纳米复合材料制造

    公开(公告)号:US08242236B2

    公开(公告)日:2012-08-14

    申请号:US12788164

    申请日:2010-05-26

    IPC分类号: B60C1/00 B82Y30/00 C08J3/21

    摘要: An elastomeric nanocomposite is produced from an isobutylene-based polymer and a layered nanofiller. The process of preparing the nanocomposite includes the steps of a) polymerizing isobutylene monomers and multiolefin monomers to produce an isobutylene-based polymer; b) completing at least one mass transfer dependent stage in the process wherein, after completion of the stage and prior to any recovery of the polymer, the polymer is dissolved in a solvent to create a polymer cement; c) contacting the layered nanofiller and the polymer solvent to obtain the nanocomposite; and d) recovering the nanocomposite. The layered nanofiller may be in a slurry prior to contacting with the polymer cement.

    摘要翻译: 弹性纳米复合材料由异丁烯基聚合物和层状纳米填料制成。 制备纳米复合材料的方法包括以下步骤:a)聚合异丁烯单体和多烯烃单体以制备异丁烯基聚合物; b)在该过程中完成至少一个传质相关阶段,其中在阶段完成之后和在任何回收聚合物之前,将聚合物溶解在溶剂中以产生聚合物粘合剂; c)使层状纳米填料和聚合物溶剂接触以获得纳米复合材料; 和d)回收纳米复合材料。 在与聚合物粘合剂接触之前,层状纳米填料可以是浆料。