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    HDPE LPBM RESIN USING ADVANCED CHROME CATALYST BY POLYETHYLENE GAS PHASE TECHNOLOGY
    1.
    发明申请
    HDPE LPBM RESIN USING ADVANCED CHROME CATALYST BY POLYETHYLENE GAS PHASE TECHNOLOGY 审中-公开

    公开(公告)号：WO2023064917A1

    公开(公告)日：2023-04-20

    申请号：PCT/US2022/078139

    申请日：2022-10-14

    申请人： UNIVATION TECHNOLOGIES, LLC

    发明人： LUGO, Elva L. ,  LIU, Bo ,  LI, Mengmeng ,  MURE, Cliff R. ,  CRAMMER, Taylor L. ,  ALEXANDRE, Francois

    IPC分类号： C08F210/16

    摘要： According to one embodiment, a process for producing a unimodal ethylene/α-olefin copolymer, the process comprising contacting ethylene and one or more (C3−C12) α-olefin comonomers with a chromium-based catalyst system in a gas-phase polymerization reactor to produce the unimodal ethylene/α-olefin copolymer; wherein the unimodal ethylene/α-olefin copolymer comprises: a density from 0.952 g/cm3 to 0.957 g/cm3; a flow index (I21) from 4.0 to 6.2 dg/min; a melt viscosity ratio (V0.1/V100) at 190 °C of 55 to 75; a molecular weight distribution (MWD) as calculated by the weight average molecular weight (Mw) divided by the number-average molecular weight (Mn) (Mw/Mn); and a peak molecular weight (Mp), all as measured by gel permeation chromatography.

    POLYETHYLENE BLEND
    4.
    发明申请
    POLYETHYLENE BLEND 审中-公开

    公开(公告)号：WO2020251764A1

    公开(公告)日：2020-12-17

    申请号：PCT/US2020/034803

    申请日：2020-05-28

    申请人： UNIVATION TECHNOLOGIES, LLC

    发明人： BORSE, Nitin ,  CHANDAK, Swapnil B.

    IPC分类号： C08L23/08 ,  C08J5/18

    摘要： A polyethylene blend that has an improved stretch break property and is useful for stretch wrap film applications. The polyethylene blend consists essentially of approximately 98 weight percent (wt%) of a linear low-density polyethylene (LLDPE) component and approximately 2 wt% of a higher molecular weight high-density polyethylene polymer (HMW HDPE) component, based on the combined weight of the LLDPE and HMW HDPE components. Also, a method of making the polyethylene blend, a formulation comprising the polyethylene blend and at least one additive that is different than the polyethylene blend, a method of making a manufactured article from the polyethylene blend or formulation; the manufactured article made thereby, and use of the polyethylene blend for stretch wrapping object(s) in need thereof.

    BIMODAL POLYETHYLENE COPOLYMER AND FILM THEREOF
    5.
    发明申请
    BIMODAL POLYETHYLENE COPOLYMER AND FILM THEREOF 审中-公开

    公开(公告)号：WO2020046663A1

    公开(公告)日：2020-03-05

    申请号：PCT/US2019/047424

    申请日：2019-08-21

    申请人： UNIVATION TECHNOLOGIES, LLC

    发明人： LIU, Bo ,  HE, Chuan ,  ABE, Daudi A. ,  KUHLMAN, Roger L. ,  BAFNA, Ayush A. ,  LYNN, Timothy R.

    IPC分类号： C08F4/659 ,  C08F210/16

    摘要： A bimodal ethylene- co -1-butene copolymer consisting essentially of a higher molecular weight component and a lower molecular weight component and, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by a combination of high-load melt index, melt flow ratio, and melt elasticity properties. A (blown) film consisting essentially of the bimodal ethylene- co -1-butene copolymer and having improved properties. Methods of synthesizing the bimodal ethylene- co -1-butene copolymer and making the blown film. A manufactured article comprising the bimodal ethylene- co -1- butene copolymer.

    METHOD OF MAINTAINING A MELT FLOW INDEX OF A POLYETHYLENE POLYMER PRODUCT
    8.
    发明申请
    METHOD OF MAINTAINING A MELT FLOW INDEX OF A POLYETHYLENE POLYMER PRODUCT 审中-公开

    公开(公告)号：WO2018226787A1

    公开(公告)日：2018-12-13

    申请号：PCT/US2018/036202

    申请日：2018-06-06

    申请人： UNIVATION TECHNOLOGIES, LLC

    发明人： SAVATSKY, Bruce J. ,  PEQUENO, R. Eric ,  LOCKLEAR, Brandon C. ,  FARLEY, Jim

    IPC分类号： C08F2/34 ,  C08F10/02

    摘要： The present disclosure provides a method of maintaining a target value of a melt flow index of a polyethylene polymer product being synthesized with a metallocene catalyst in a fluidized bed gas phase reactor. The method includes producing the polyethylene polymer product at the target value of the melt flow index with a metallocene catalyst in a fluidized bed gas phase reactor at a steady state in which the fluidized bed gas phase reactor is at a first reactor temperature and receives feeds of hydrogen and ethylene at a hydrogen to ethylene feed ratio at a first ratio value. When a change in reactor temperature is detected, the hydrogen to ethylene feed ratio is changed from the first ratio value to a second ratio value so as to maintain the melt flow index value of the polyethylene polymer product at the target value.

    BLENDS OF LINEAR LOW DENSITY POLYETHYLENES
    9.
    发明申请
    BLENDS OF LINEAR LOW DENSITY POLYETHYLENES 审中-公开

    公开(公告)号：WO2018222571A1

    公开(公告)日：2018-12-06

    申请号：PCT/US2018/034845

    申请日：2018-05-29

    申请人： UNIVATION TECHNOLOGIES, LLC

    发明人： CHANDAK, Swapnil B. ,  BORSE, Nitin

    IPC分类号： C08L23/08

    摘要： A polyethylene blend comprising a uniform dispersion of constituents (A) and (B): (A) a Ziegler-Natta catalyst-made linear low density polyethylene and (B) a metallocene catalyst-made linear low density polyethylene, a composition comprising the polyethylene blend and at least one additive, methods of making and using same, and manufactured articles and films comprising or made from same.