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    PROCESS
    3.
    发明公开
    PROCESS 审中-公开

    公开(公告)号：US20230416428A1

    公开(公告)日：2023-12-28

    申请号：US18039082

    申请日：2021-11-26

    Applicant: BOREALIS AG

    Inventor： Tuan Anh TRAN ,  Alexandra Romina ALBUNIA ,  Qizheng DOU ,  Victor SUMERIN ,  Markku VAHTERI ,  Jarmo KELA

    IPC: C08F210/16 ,  C08J5/18

    CPC classification number: C08F210/16 ,  C08J5/18 ,  C08J2323/08 ,  C08J2423/08

    Abstract: The invention provides a process for the preparation of a multimodal high density polyethylene (HDPE) having a density of greater than 950 kg/m, a Mz of at least 1000 kDa and a melt flow rate (MFR5) of 0.01 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; (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; 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; wherein the split for the third polymerisation stage is at least 50%.

    PROCESS FOR PRODUCING POLYETHYLENE
    4.
    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.

    PROCESS FOR PRODUCING POLYETHYLENE
    6.
    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.

    A PROCESS FOR PRODUCING A MULTIMODAL ETHYLENE POLYMER AND FILMS PREPARED THEREFROM
    7.
    发明公开
    A PROCESS FOR PRODUCING A MULTIMODAL ETHYLENE POLYMER AND FILMS PREPARED THEREFROM 审中-公开

    公开(公告)号：US20240279368A1

    公开(公告)日：2024-08-22

    申请号：US18569034

    申请日：2022-06-10

    Applicant: BOREALIS AG

    Inventor： Felice DE SANTIS ,  Tuan Anh TRAN ,  Victor SUMERIN ,  Markku VAHTERI ,  Anna Maria HARTL

    IPC: C08F10/02 ,  C08J5/18 ,  C08L23/08

    CPC classification number: C08F10/02 ,  C08J5/18 ,  C08L23/0815 ,  C08J2323/06 ,  C08J2323/08 ,  C08J2423/06 ,  C08J2423/08 ,  C08L2205/025 ,  C08L2308/00 ,  C08L2314/02

    Abstract: A process for producing a multimodal ethylene polymer comprising the steps of (i) polymerising ethylene in a first polymerisation step in the presence of a Ziegler-Natta polymerisation catalyst to produce a first ethylene homopolymer (PEI) having a melt flow rate MFR2 of from 100 to 300 g/10 min (ISO 1133-1 at 190° C. under 2.16 kg load); (ii) polymerising ethylene in a second polymerisation step in the presence of the first ethylene homopolymer to produce a first ethylene polymer mixture (PEM1) comprising the first ethylene homopolymer and a second ethylene homopolymer, said first ethylene polymer mixture having a melt flow rate MFR2 of from 200 to 1000 g/10 min, and wherein the MFR2 of the first ethylene homopolymer (PEI) is lower than the MFR2 of the first ethylene polymer mixture (PEM1); and (iii) copolymerising ethylene and at least one alpha-olefin comonomer in a third polymerisation step in the presence of the first ethylene polymer mixture to produce a second ethylene polymer mixture (PEM2) comprising the first ethylene polymer mixture and a third ethylene copolymer (PE3), said second ethylene polymer mixture having a density of from 937 to 950 kg/m3 (ISO 1183-2) and a melt flow rate MFR5 of from 0.1 to 5.0 g/10 min (ISO 1133-1 at 190° C. under 5 kg load).

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