中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

38 records (took 0.018 seconds)

    Modified Ziegler-Natta (pro) catalysts and system
    23.
    发明授权
    Modified Ziegler-Natta (pro) catalysts and system 有权

    公开(公告)号：US11091572B2

    公开(公告)日：2021-08-17

    申请号：US16331644

    申请日：2017-09-21

    Applicant: Dow Global Technologies LLC

    Inventor： Linfeng Chen ,  Mehmet Demirors

    IPC: C08F210/16 ,  C08F10/00

    Abstract: A modified Ziegler-Natta procatalyst that is a product mixture of modifying an initial Ziegler-Natta procatalyst with a molecular (pro)catalyst, and optionally an activator, the modifying occurring before activating the modified Ziegler-Natta procatalyst with an activator and before contacting the modified Ziegler-Natta procatalyst with a polymerizable olefin. Also, a modified catalyst system prepared therefrom, methods of preparing the modified Ziegler-Natta procatalyst and the modified catalyst system, a method of polymerizing an olefin using the modified catalyst system, and a polyolefin product made thereby.

    A POLYOLEFIN COMPOSITION AND METHOD OF PRODUCING THE SAME
    24.
    发明申请
    A POLYOLEFIN COMPOSITION AND METHOD OF PRODUCING THE SAME 有权
    聚烯烃组合物及其制造方法

    公开(公告)号：US20160340453A1

    公开(公告)日：2016-11-24

    申请号：US15025366

    申请日：2014-10-30

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Linfeng Chen ,  Stephanie M. Whited ,  Robert J. Jorgensen

    IPC: C08F210/16

    CPC classification number: C08F210/16 ,  C08F210/14 ,  C08F4/6494 ,  C08F4/6543

    Abstract: The instant invention provides a polyolefin composition, a catalyst composition, and a method of producing the same. The method for polymerizing one or more polyolefins according to the present invention comprises the steps of: (1) selecting a first olefin monomer and optionally one or more alpha-olefin comonomers; (2) selecting one or more catalyst systems comprising one or more procatalysts comprising a first metal selected from the group consisting of Ti, V, Hf, Zr, and combinations or mixture two or more thereof, one or more cocatalysts comprising Al, and one or more self-limiting agents (SLA) selected from the group consisting of polyether, polyester, and combinations or mixtures thereof; wherein the ratio of said SLA to said first metal (SLA:first metal) is from 0.1:1 to 30:1; (3) polymerizing said first olefin monomer and optionally one or more alpha-olefin comonomers in the presence of said one or more catalyst systems via a slurry polymerization process or gas-phase polymerization process in one or more reactors; (4) thereby producing one or more olefin-based polymers; (5) wherein said catalyst system has a loss of least 85 percent of catalyst activity when the temperature is increased from 85 to 110° C.

    Abstract translation: 本发明提供一种聚烯烃组合物，催化剂组合物及其制备方法。 根据本发明的聚合一种或多种聚烯烃的方法包括以下步骤：（1）选择第一烯烃单体和任选的一种或多种α-烯烃共聚单体; （2）选择一种或多种催化剂体系，其包含一种或多种前催化剂，其包含选自Ti，V，Hf，Zr的第一金属，以及其组合或混合物两种或多种，​​一种或多种包含Al的助催化剂和一种 或更多的选自聚醚，聚酯及其组合或混合物的自限制剂（SLA）; 其中所述SLA与所述第一金属（SLA：第一金属）的比例为0.1:1至30:1; （3）通过在一个或多个反应器中的淤浆聚合方法或气相聚合方法在所述一种或多种催化剂体系的存在下将所述第一烯烃单体和任选的一种或多种α-烯烃共聚单体聚合; （4），从而制备一种或多种烯烃基聚合物; （5）其中当温度从85℃升至110℃时，所述催化剂体系具有至少85％的催化剂活性损耗。

    Catalyst composition with halo-malonate internal electron donor and polymer from same
    25.
    发明授权
    Catalyst composition with halo-malonate internal electron donor and polymer from same 有权
    具有卤代丙二酸酯内电子给体的催化剂组合物及其相同的聚合物

    公开(公告)号：US08697827B2

    公开(公告)日：2014-04-15

    申请号：US13760279

    申请日：2013-02-06

    Applicant: Dow Global Technologies LLC

    Inventor： Linfeng Chen ,  Tak W. Leung ,  Tao Tao

    IPC: B01J31/38 ,  C08F210/06 ,  C08F110/06

    CPC classification number: C08F4/6494 ,  C08F10/00 ,  C08F110/06 ,  C08F4/651 ,  C08F2500/12 ,  C08F2500/04

    Abstract: Disclosed herein are procatalyst compositions, catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions contain a halo-malonate and a 2-fluoro-malonate in particular. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and also improve hydrogen response during polymerization. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 50 g/10 min.

    Abstract translation: 本文公开的是前催化剂组合物，催化剂组合物和聚合物，即由其制备的基于丙烯的聚合物。 本发明的前催化剂组合物特别包含卤代丙二酸酯和2-氟 - 丙二酸酯。 本催化剂组合物改善催化剂选择性，改善催化剂活性，并且还改善聚合期间的氢响应。 由本催化剂组合物制备的基于丙烯的聚合物的熔体流动速率大于50g / 10min。

    Process for Producing Procatalyst Composition with Alkoxyalkyl Ester Internal Electron Donor and Product
    27.
    发明申请
    Process for Producing Procatalyst Composition with Alkoxyalkyl Ester Internal Electron Donor and Product 有权
    用烷氧基烷基酯内部电子给体和产物生产主催化剂组合物的方法

    公开(公告)号：US20130225398A1

    公开(公告)日：2013-08-29

    申请号：US13854453

    申请日：2013-04-01

    Applicant: Dow Global Technologies LLC

    Inventor： Linfeng Chen ,  Tak W. Leung ,  Kelly Gonzalez ,  Tao Tao

    IPC: C08F4/649

    CPC classification number: C08F4/6498 ,  C08F10/00 ,  C08F110/06 ,  C08F4/651 ,  C08F2500/12 ,  C08F2500/18 ,  C08F2500/24

    Abstract: Disclosed herein are processes for preparing procatalyst compositions with an internal electron donor containing greater than 4.5 wt % of a compounded alkoxyalkyl ester. Also disclosed are catalyst compositions containing the procatalyst composition and polymers, i.e., propylene-based polymers, produced therefrom. The present procatalyst compositions improve catalyst selectivity, catalyst activity, procatalyst morphology and polymer particle morphology, and improve hydrogen response during olefin polymerization.

    Abstract translation: 本文公开了用含有大于4.5重量％的配合的烷氧基烷基酯的内电子给体制备原催化剂组合物的方法。 还公开了含有前催化剂组合物和聚合物的催化剂组合物，即由其制备的基于丙烯的聚合物。 本发明的主催化剂组合物改善催化剂选择性，催化剂活性，原催化剂形态和聚合物颗粒形态，并改善烯烃聚合期间的氢响应。

    POLYMERIZATION CATALYSTS FOR PRODUCTION OF POLYETHYLENE WITH HIGH MOLECULAR WEIGHT
    28.
    发明申请
    POLYMERIZATION CATALYSTS FOR PRODUCTION OF POLYETHYLENE WITH HIGH MOLECULAR WEIGHT 有权

    公开(公告)号：US20220389137A1

    公开(公告)日：2022-12-08

    申请号：US17630798

    申请日：2020-07-30

    Applicant: Dow Global Technologies LLC

    Inventor： Linfeng Chen ,  Kurt F. Hirsekorn ,  Jeffrey A. Simms ,  David M. Pearson

    IPC: C08F210/16

    Abstract: The catalyst system includes a heterogeneous procatalyst, an electron donor, and a hydrogenation procatalyst. The heterogeneous procatalyst includes a titanium species, an aluminum species, and a magnesium chloride component. The hydrogenation procatalyst has the formula Cp2TiXnTiCp2 or Cp2TiXn. In formula Cp2TiXn, each Cp is a cyclopentadienyl substituted with at least one R1, wherein R1 is (C1-C10)alkyl; and each X is independently monoanionic or neutral, wherein each X is independently (C1-C40)hydrocarbon, (C1-C40)heterohydrocarbon, (C1-C40)hydrocarbyl, (C1—C40)heterohydrocarbyl, or a halogen atom.

Patent Agency Ranking