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    Method of changing melt rheology property of bimodal polyethylene polymer
    3.
    发明授权
    Method of changing melt rheology property of bimodal polyethylene polymer 有权

    公开(公告)号：US12173108B2

    公开(公告)日：2024-12-24

    申请号：US17426147

    申请日：2019-08-21

    Applicant: Univation Technologies, LLC

    Inventor： Chuan He ,  Timothy R. Lynn ,  Robert N. Reib ,  Bo Liu

    IPC: C08F210/16 ,  C08F2/34 ,  C08F4/659 ,  C08F2/38

    Abstract: A method of independently changing a melt rheology property value of a bimodal polyethylene polymer being made using a bimodal catalyst system in a single gas phase polymerization reactor. The method comprises process conditions comprising alkane(s) in the reactor. The method comprises a bimodal catalyst system that is characterized by an inverse response to alkane(s) concentration. The method comprises changing concentration of the alkane(s) in the reactor by an amount sufficient to effect a measurable change in the melt rheology property value; wherein the bimodal catalyst system is characterized by an inverse response to alkane(s) concentration such that when the alkane(s) concentration is increased, the melt rheology property value of the resulting bimodal polyethylene polymer is decreased, and when the alkane(s) concentration is decreased, the melt rheology property value of the resulting bimodal polyethylene polymer is increased.

    UNIMODAL POLYETHYLENE COPOLYMER AND FILM THEREOF
    4.
    发明申请
    UNIMODAL POLYETHYLENE COPOLYMER AND FILM THEREOF 有权

    公开(公告)号：US20210261703A1

    公开(公告)日：2021-08-26

    申请号：US17261605

    申请日：2019-07-29

    Applicant: Univation Technologies, LLC

    Inventor： Bo Liu ,  Yi Zhang ,  Ayush A. Bafna ,  François Alexandre ,  Robert N. Reib

    IPC: C08F210/16 ,  C08J5/18

    Abstract: A unimodal ethylene-co-1-hexene copolymer that, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by combination of melt elasticity and complex viscosity ratio (shear thinning) properties. A blown film consisting essentially of the unimodal ethylene-co-1-hexene copolymer. A method of synthesizing the unimodal ethylene-co-1-hexene copolymer. A method of making the blown film. A manufactured article comprising the unimodal ethylene-co-1-hexene copolymer.

    METHOD OF CHANGING MELT RHEOLOGY PROPERTY OF BIMODAL POLYETHYLENE POLYMER
    7.
    发明公开
    METHOD OF CHANGING MELT RHEOLOGY PROPERTY OF BIMODAL POLYETHYLENE POLYMER 审中-公开

    公开(公告)号：US20240101725A1

    公开(公告)日：2024-03-28

    申请号：US17426147

    申请日：2019-08-21

    Applicant: Univation Technologies, LLC

    Inventor： Chuan He ,  Timothy R. Lynn ,  Robert N. Reib ,  Bo Liu

    IPC: C08F4/659 ,  C08F210/16

    CPC classification number: C08F4/65912 ,  C08F210/16 ,  C08F2400/02

    Abstract: A method of independently changing a melt rheology property value of a bimodal polyethylene polymer being made using a bimodal catalyst system in a single gas phase polymerization reactor. The method comprises process conditions comprising alkane(s) in the reactor. The method comprises a bimodal catalyst system that is characterized by an inverse response to alkane(s) concentration. The method comprises changing concentration of the alkane(s) in the reactor by an amount sufficient to effect a measurable change in the melt rheology property value; wherein the bimodal catalyst system is characterized by an inverse response to alkane(s) concentration such that when the alkane(s) concentration is increased, the melt rheology property value of the resulting bimodal polyethylene polymer is decreased, and when the alkane(s) concentration is decreased, the melt rheology property value of the resulting bimodal polyethylene polymer is increased.

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