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    PROCESS FOR PRODUCING POLYETHYLENE
    3.
    发明申请
    PROCESS FOR PRODUCING POLYETHYLENE 审中-公开

    公开(公告)号：US20180030179A1

    公开(公告)日：2018-02-01

    申请号：US15548882

    申请日：2016-02-04

    Applicant: BOREALIS AG

    Inventor： Victor SUMERIN ,  Joseph THORMAN ,  Jani AHO ,  Markku VAHTERI ,  Ravindra TUPE ,  Jarmo KELA

    IPC: C08F210/16

    CPC classification number: C08F210/16 ,  C08L23/16 ,  C08F4/6465 ,  C08F2/001 ,  C08F210/14 ,  C08F2500/04 ,  C08F2500/12 ,  C08F2500/07 ,  C08F4/6492 ,  C08F4/6555

    Abstract: The present invention relates to a process for producing ethylene copolymers in a multistage process comprising at least one slurry phase polymerization stage and at least one gas phase polymerization stage in the presence of Ziegler Natta catalyst comprising a solid catalyst component, a cocatalyst of a compound of group 13 metal and an external additive selected from alkoxysilanes of formula (I) R1nSi(OR2)4-n, (I) where n is an integer 0 to 3, each R1 are equal or different and are selected among H, halogen, alkyl groups of 1 to 6 10 carbon atoms optionally substituted with one or more halogen atoms, alkenyl groups of 2 to 6 carbon atoms optionally substituted with one or more halogen atoms, and aryl groups of 6 to 12 carbon atoms optionally substituted with one or more halogen atoms, or the R1 groups can form with the Si atom they are linked to a ring of 3 to 8 ring atoms, provided that all R1 are not hydrogen, R2 are equal or different and are selected among alkyl groups of 1 to 6 carbon atoms optionally substituted with one or more halogen atoms, alkenyl groups of 2 to 6 carbon atoms optionally substituted with one or more halogen atoms, and aryl groups of 6 to 12 carbon atoms optionally substituted with one or more halogen atoms, or the OR2 groups can form with the Si atom they are linked to a ring of 3 to 8 ring atoms, halogen is Br, Cl or F. The invention further relates to the catalysts and use thereof in said multistage process r for producing ethylene copolymers having melt flow rate ratio FRR21/5 at least 40 and/or polydispersity index PDI of at least 27.

    POLYMER FOR CABLE JACKET
    4.
    发明公开
    POLYMER FOR CABLE JACKET 审中-公开

    公开(公告)号：US20230203286A1

    公开(公告)日：2023-06-29

    申请号：US17926265

    申请日：2021-05-19

    Applicant: BOREALIS AG

    Inventor： Anna HJÄRTFORS ,  John JAMIESON ,  Ravindra TUPE ,  Pauli LESKINEN

    IPC: C08L23/08 ,  H01B3/44

    CPC classification number: C08L23/0815 ,  H01B3/441 ,  C08L2205/025 ,  C08L2203/202

    Abstract: A multimodal polyethylene composition having a lower molecular weight (LMW) ethylene homo or copolymer component (A) and a higher molecular weight ethylene copolymer component (B); wherein the LMW component comprises two fractions (ai) and (aii); wherein the polymer composition has a density of 930 kg/m3 or more (ISO1183), such as 938 to 955 kg/m3, an MFR2 (ISO1133 at 190° C. and 2.16 kg load) in the range of 0.05 to 10 g/10 min, a flex modulus of up to 800 MPa (ISO 178:2010), such as 300 to 800 MPa (ISO 178:2010) and a taber abrasion resistance of 8.0 to 13.0 mg/1000 cycle (ASTM D 4060: 2014).

    PROCESS FOR THE PREPARATION OF MULTIMODAL HIGH DENSITY POLYETHYLENE
    9.
    发明申请
    PROCESS FOR THE PREPARATION OF MULTIMODAL HIGH DENSITY POLYETHYLENE 有权

    公开(公告)号：US20210147660A1

    公开(公告)日：2021-05-20

    申请号：US17056855

    申请日：2019-05-30

    Applicant: BOREALIS AG

    Inventor： Anh Tuan TRAN ,  Alexandra Romina ALBUNIA ,  Joy Jie CHENG ,  Joseph THORMAN ,  John JAMIESON ,  Ravindra TUPE

    IPC: C08L23/06 ,  C08F210/02 ,  C08F210/08 ,  C08F2/00 ,  C08F2/34 ,  B29C45/00 ,  B29C43/00

    Abstract: The invention provides a process for the preparation of a multimodal high density polyethylene (HDPE) having a melt flow rate (MFR2) of 0.1 to 4.0 g/10 min, said process comprising: (i) polymerising ethylene in a first polymerisation stage in the presence of a Ziegler-Natta catalyst to prepare a first ethylene homopolymer having a MFR2 from 10 to 500 g/10 min; (ii) polymerising ethylene in a second polymerisation stage in the presence of said catalyst and said first ethylene homopolymer to prepare an ethylene homopolymer mixture comprising said first ethylene homopolymer and a second ethylene homopolymer, said mixture having a MFR2 from 50 to 1000 g/10 min; and (iii) polymerising ethylene and at least one alpha-olefin comonomer in a third polymerisation stage in the presence of said catalyst and said ethylene homopolymer mixture to prepare said multimodal HDPE.

    PROCESS FOR PRODUCING POLYETHYLENE
    10.
    发明申请
    PROCESS FOR PRODUCING POLYETHYLENE 审中-公开

    公开(公告)号：US20190292284A1

    公开(公告)日：2019-09-26

    申请号：US16438690

    申请日：2019-06-12

    Applicant: BOREALIS AG

    Inventor： Victor SUMERIN ,  Joseph THORMAN ,  Jani AHO ,  Markku VAHTERI ,  Ravindra TUPE ,  Jarmo KELA

    IPC: C08F210/16 ,  C08L23/16

    Abstract: The present invention relates to a process for producing ethylene copolymers in a multistage process comprising at least one slurry phase polymerization stage and at least one gas phase polymerization stage in the presence of Ziegler Natta catalyst comprising a solid catalyst component, a cocatalyst of a compound of group 13 metal and an external additive selected from alkoxysilanes of formula (1) R1nSi(OR2)4-n, (I) where n is an integer 0 to 3, each R1 are equal or different and are selected among H, halogen, alkyl groups of 1 to 6 10 carbon atoms optionally substituted with one or more halogen atoms, alkenyl groups of 2 to 6 carbon atoms optionally substituted with one or more halogen atoms, and aryl groups of 6 to 12 carbon atoms optionally substituted with one or more halogen atoms, or the R1 groups can form with the Si atom they are linked to a ring of 3 to 8 ring atoms, provided that all R1 are not hydrogen, R2 are equal or different and are selected among alkyl groups of 1 to 6 carbon atoms optionally substituted with one or more halogen atoms, alkenyl groups of 2 to 6 carbon atoms optionally substituted with one or more halogen atoms, and aryl groups of 6 to 12 carbon atoms optionally substituted with one or more halogen atoms, or the OR2 groups can form with the Si atom they are linked to a ring of 3 to 8 ring atoms, halogen is Br, Cl or F. The invention further relates to the catalysts and use thereof in said multistage process r for producing ethylene copolymers having melt flow rate ratio FRR21/5 at least 40 and/or polydispersity index PDI of at least 27.

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