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    Process for producing polyethylene
    21.
    发明授权
    Process for producing polyethylene 有权

    公开(公告)号：US10364310B2

    公开(公告)日：2019-07-30

    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 ,  C08F210/14 ,  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 (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, CI 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.

    ZIEGLER-NATTA CATALYSTS FOR OLEFIN POLYMERIZATION
    23.
    发明申请
    ZIEGLER-NATTA CATALYSTS FOR OLEFIN POLYMERIZATION 有权

    公开(公告)号：US20220411543A1

    公开(公告)日：2022-12-29

    申请号：US17764233

    申请日：2020-10-01

    Applicant: Borealis AG

    Inventor： Victor Sumerin ,  Georgy Kipiani

    IPC: C08F4/649 ,  C08F210/16

    Abstract: The present invention relates to use of optionally monosubstituted 2,2-di(tetrahydrofuryl)methanes, as internal donors in Ziegler-Natta catalysts to obtain polymers with desirable properties. The present disclosure further concerns Ziegler-Natta catalyst components comprising said optionally monosubstituted 2,2-di(tetrahydrofuryl)methanes and Ziegler-Natta catalysts for olefin polymerization comprising said Ziegler-Natta catalyst components as well as a method for preparing the same and their use in providing polyolefins.

    POLYETHYLENE COMPOSITION FOR HIGH PRESSURE RESISTANT PIPES WITH IMPROVED HOMOGENEITY
    25.
    发明申请
    POLYETHYLENE COMPOSITION FOR HIGH PRESSURE RESISTANT PIPES WITH IMPROVED HOMOGENEITY 有权

    公开(公告)号：US20210317290A1

    公开(公告)日：2021-10-14

    申请号：US17287579

    申请日：2019-10-22

    Applicant: BOREALIS AG

    Inventor： Yi Liu ,  Victor Sumerin ,  Qizheng Dou

    IPC: C08L23/08 ,  C08F210/16 ,  C08F2/00 ,  C08F4/02

    Abstract: The present invention relates to a polyethylene composition comprising a base resin having a density of from 952.0 kg/m3 to 960.0 kg/m3, determined according to ISO 1183, wherein the polyethylene composition has a melt flow rate MFR21 (190° C., 21.16 kg), of from 1.0 to 7.5 g/10 min, determined according to ISO 1133, a complex viscosity at a frequency of 0.05 rad/s eta0.05 of from 750 kPa #s to 1900 kPa #s, determined according to ISO 6721-1 and ISO 6721-10, and a white spot rating of not more than 12.0, determined according to ISO 18553, a polyethylene composition obtainable by a multi-stage process, a process for producing said polyethylene composition, an article, such as a pipe or pipe fitting, comprising said polyethylene composition and the use of said polyethylene composition for the production of an article.

    Process for producing LLDPE resins
    27.
    发明授权
    Process for producing LLDPE resins 有权

    公开(公告)号：US10584196B2

    公开(公告)日：2020-03-10

    申请号：US15739649

    申请日：2016-06-23

    Applicant: BOREALIS AG

    Inventor： Alexandra Romina Albunia ,  Ravindra Tupe ,  Victor Sumerin ,  John Jamieson ,  Jani Aho ,  Markku Vahteri ,  Jarmo Kela ,  Renate Eckmayr

    IPC: C08F210/16 ,  C08F110/02 ,  C08F2/00 ,  C08F2/14 ,  C08F2/34 ,  C08F4/02 ,  C08L23/08 ,  C08L23/06

    Abstract: A process for producing copolymers of ethylene and at least one alpha-olefin having from 4 to 10 carbon atoms in the presence of a solid Ziegler-Natta catalyst comprising of magnesium, titanium, halogen and an internal organic compound, the copolymer having a density of from 906 to 937 kg/m3 and a melt flow rate MFR21 measured at 190° C. under 21.6 kg load of from 3 to 150 g/10 min. The process includes the steps of (A) homopolymerising ethylene or copolymerising ethylene and a first alpha-olefin having from 4 to 10 carbon atoms in a first polymerisation stage in the presence of the polymerisation catalyst, hydrogen and optionally the first alpha-olefin; (B) copolymerising ethylene and a second alpha-olefin having from 4 to 10 carbon atoms in a second polymerisation stage in the presence of the first homo- or copolymer of ethylene and the Ziegler-Natta catalyst; and (C) recovering the polymer mixture.

    Ziegler-natta catalyst and preparation thereof
    29.
    发明授权
    Ziegler-natta catalyst and preparation thereof 有权

    公开(公告)号：US10118977B2

    公开(公告)日：2018-11-06

    申请号：US15536919

    申请日：2015-12-17

    Applicant: Borealis AG

    Inventor： Victor Sumerin ,  Joseph Thorman

    IPC: C08F210/16

    Abstract: This invention relates to a solid MgCl2 based Natta catalyst component for producing olefin polymers and preparation of said catalyst component. Further the invention relates to a Ziegler Natta catalyst comprising said solid catalyst component, Group 13 metal compound as cocatalyst and optionally external additives. The invention further relates to the use of said catalyst component in producing olefin polymers, especially ethylene polymers with desired properties.

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