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    BIMODAL POLYETHYLENE-BASED COMPOSITION
    1.
    发明公开
    BIMODAL POLYETHYLENE-BASED COMPOSITION 审中-公开

    公开(公告)号：US20240209193A1

    公开(公告)日：2024-06-27

    申请号：US17597978

    申请日：2020-08-19

    Applicant: Dow Global Technologies LLC

    Inventor： Alexander Williamson ,  Andrew T. Heitsch ,  Stephanie M. Whited ,  Mridula Babli Kapur

    IPC: C08L23/06 ,  C08F4/6592 ,  C08F10/02 ,  C08J5/18

    CPC classification number: C08L23/06 ,  C08F4/6592 ,  C08F10/02 ,  C08J5/18 ,  C08J2323/06 ,  C08J2423/06 ,  C08L2205/24

    Abstract: A bimodal polyethylene-based composition that is useful for making under film extrusion conditions a film that beneficially has both decreased water vapor transmission rate and decreased haze. The composition comprises an improved design of the composition of the polyethylene blend of a higher molecular weight polyethylene polymer constituent and a lower molecular weight polyethylene polymer constituent and an effective amount of a nucleating agent. Additional embodiments include a method of making the bimodal polyethylene-based composition, a formulation comprising the bimodal polyethylene-based composition and at least one additive, a method of making a manufactured article from the bimodal polyethylene-based composition or formulation; the manufactured article made thereby, use of the bimodal polyethylene-based composition for protecting a moisture-sensitive material, and a sealed package made therefrom. A bimodal polyethylene-based composition that is useful for making under film extrusion conditions a film that beneficially has both decreased water vapor transmission rate and decreased haze. The composition comprises an improved design of the composition of the polyethylene blend of a higher molecular weight polyethylene polymer constituent and a lower molecular weight polyethylene polymer constituent and an effective amount of a nucleating agent. Additional embodiments include a method of making the bimodal polyethylene-based composition, a formulation comprising the bimodal polyethylene-based composition and at least one additive, a method of making a manufactured article from the bimodal polyethylene-based composition or formulation; the manufactured article made thereby, use of the bimodal polyethylene-based composition for protecting a moisture-sensitive material, and a sealed package made therefrom.

    Polyolefin composition and method of producing the same
    4.
    发明授权
    Polyolefin composition and method of producing the same 有权

    公开(公告)号：US09879105B2

    公开(公告)日：2018-01-30

    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.

    Ethylene-based resins for closure applications
    7.
    发明授权
    Ethylene-based resins for closure applications 有权

    公开(公告)号：US11208546B2

    公开(公告)日：2021-12-28

    申请号：US15328312

    申请日：2015-08-25

    Applicant: Dow Global Technologies LLC

    Inventor： Mridula Kapur ,  Stephanie M. Whited ,  Mark T. Jablonka

    IPC: C08L23/08 ,  C08L23/04 ,  B65D53/00 ,  C08L23/06

    Abstract: An ethylene-based resin comprising a high molecular weight component and a low molecular weight component, wherein the high molecular weight component comprises an ethylene/alpha-olefin copolymer or ethylene homopolymer, and has a density ranging from 0.940 g/cc to 0.960 g/cc, and a high load melt index (I21.6) ranging from 4 g/10 min to 15 g/10 min, and wherein the ethylene-based resin has: an overall density ranging from greater than 0.955 to less than or equal to 0.970 g/cc, an overall melt index (I2.16) ranging from 0.5 g/10 min to 7 g/10 min, and less than 0.2 vinyls per 1000 carbon atoms.

    A POLYOLEFIN COMPOSITION AND METHOD OF PRODUCING THE SAME
    9.
    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。

    POLYETHYLENE COMPOSITIONS, METHODS OF MAKING THE SAME, AND ARTICLES PREPARED THEREFROM
    10.
    发明申请
    POLYETHYLENE COMPOSITIONS, METHODS OF MAKING THE SAME, AND ARTICLES PREPARED THEREFROM 有权
    聚乙烯组合物，其制备方法和制备的制品

    公开(公告)号：US20130137828A1

    公开(公告)日：2013-05-30

    申请号：US13717247

    申请日：2012-12-17

    Applicant: Dow Global Technologies LLC

    Inventor： William J. Michie, JR. ,  Dane Chang ,  Lonnie G. Hazlitt ,  Stephanie M. Whited ,  Michael A. Kinnan ,  Anthony G. Neubeuer ,  Thoi H. Ho

    IPC: C08L23/26

    CPC classification number: C08L23/26 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2666/06

    Abstract: The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min. The blend has a single peak in an ATREF profile eluting above 30° C., and has a coefficient of viscosity average molecular weight (CMv) less than −0.0032 in the log (calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70° C. to 90° C. The Mv is the viscosity average molecular weight.

    Abstract translation: 本发明涉及适于制造具有优异性能的管道和其它制品的组合物。 本发明提供一种包含共混物的组合物，其中所述共混物包含高分子量乙烯基互聚物和低分子量乙烯基互聚物，并且高分子量乙烯基互聚物是非均匀支化的线性或均匀支化的 线性乙烯类互聚物，密度为0.922g / cc〜0.929g / cc，高负荷熔融指数（I21）为0.2g / 10min〜1.0g / 10min，低分子量乙烯 - 基于异构支化的线型或均匀支化的线性乙烯基互聚物，其密度为0.940g / cc至0.955g / cc，熔体指数（I 2）为6g / 10min至50g / 10min 。 共混物在30℃以上洗脱的ATREF谱中具有单峰，并且在对数（计算出的Mv）相对于洗脱温度具有小于-0.0032的粘均分子量（CMv）系数，所述CMv计算在范围内 的洗脱温度从70℃至90℃.Mv是粘均分子量。

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