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    Oxygen tailoring of polyethylene resins
    7.
    发明申请
    Oxygen tailoring of polyethylene resins 有权
    聚乙烯树脂氧气定制

    公开(公告)号：US20060038312A1

    公开(公告)日：2006-02-23

    申请号：US11176046

    申请日：2005-07-07

    Applicant: Dongming Li ,  Ching-Tai Lue

    Inventor： Dongming Li ,  Ching-Tai Lue

    IPC: B29C47/00

    CPC classification number: C08F8/00 ,  B29B9/06 ,  B29B9/12 ,  B29C47/0004 ,  B29C47/0023 ,  B29C47/1072 ,  B29K2023/06 ,  B29K2105/256 ,  C08F10/02

    Abstract: Methods of tailoring polyethylenes are contemplated utilizing 0.5 to 70 volume percent oxygen containing gases. The tailoring occurs in a melt-conveying zone of a mixer/extruder, and not in the feed or melting zones of a mixer/extruder. The effect of tailoring is to decrease the haze and/or increase the gloss of blown films made from the tailored polyethylenes compared to similar polyethylenes that are extruded/mixed in the substantial absence of oxygen or oxygen containing gases.

    Abstract translation: 考虑使用0.5至70体积％含氧气体来调节聚乙烯的方法。 剪切发生在混合器/挤出机的熔体输送区域中，而不是在混合器/挤出机的进料或熔融区域中。 与基本上不含氧气或含氧气体挤出/混合的类似聚乙烯相比，定制的效果是降低由定制的聚乙烯制成的吹塑薄膜的雾度和/或增加的光泽度。

    Metallocene catalysts and their use in polymerization processes
    8.
    发明授权
    Metallocene catalysts and their use in polymerization processes 有权
    茂金属催化剂及其在聚合工艺中的应用

    公开(公告)号：US08598287B2

    公开(公告)日：2013-12-03

    申请号：US12739308

    申请日：2008-10-09

    Applicant: Chi-I Kuo ,  Dongming Li ,  Ching-Tai Lue ,  Francis C. Rix ,  Mark G Goode ,  Daniel P. Zilker, Jr. ,  Tae Hoon Kwalk

    Inventor： Chi-I Kuo ,  Dongming Li ,  Ching-Tai Lue ,  Francis C. Rix ,  Mark G Goode ,  Daniel P. Zilker, Jr. ,  Tae Hoon Kwalk

    IPC: C08F4/6592 ,  C08F4/643 ,  C08L23/14

    CPC classification number: B01J31/2295 ,  B01J2531/48 ,  B01J2531/49 ,  C08F4/65912 ,  C08F4/65916 ,  C08F210/16 ,  C08F4/65925 ,  C08F4/65927

    Abstract: A process for polymerizing olefin(s) utilizing a cyclic bridged metallocene catalyst system to produce polymers with improved properties is provided. The catalyst system may include a cyclic bridged metallocene, LA(R′SiR′)LBZrQ2, activated by an activator, the activator comprising aluminoxane, a modified aluminoxane, or a mixture thereof, and supported by a support, where: LA and LB are independently an unsubstituted or a substituted cyclopentadienyl ligand bonded to Zr and defined by the formula (C5H4-dRd), where R is hydrogen, a hydrocarbyl substituent, a substituted hydrocarbyl substituent, or a heteroatom substituent, and where d is 0, 1, 2, 3 or 4; LA and LB are connected to one another with a cyclic silicon bridge, R′SiR′, where R′ are independently hydrocarbyl or substituted hydrocarbyl substituents that are connected with each other to form a silacycle ring; and each Q is a labile hydrocarbyl or a substituted hydrocarbyl ligand.

    Abstract translation: 提供了利用环状桥连金属茂催化剂体系聚合烯烃以制备具有改进性能的聚合物的方法。 催化剂体系可以包括由活化剂活化的环状桥连金属茂LA（R'SiR'）LBZrQ2，活化剂包括铝氧烷，改性铝氧烷或其混合物，并由载体支持，其中：LA和LB是 独立地是未取代的或取代的环戊二烯基配体，其与Zr键合并由式（C5H4-dRd）定义，其中R是氢，烃基取代基，取代的烃基取代基或杂原子取代基，其中d是0,1,2 ，3或4; LA和LB通过环硅桥R'SiR'彼此连接，其中R'独立地是彼此连接形成硅环的烃基或取代的烃基取代基; 并且每个Q是不稳定的烃基或取代的烃基配体。

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