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    Polyethylene Pipe Resin with High Resistance to Slow Crack Growth
    11.
    发明公开
    Polyethylene Pipe Resin with High Resistance to Slow Crack Growth 审中-公开

    公开(公告)号：US20230257489A1

    公开(公告)日：2023-08-17

    申请号：US18014219

    申请日：2021-07-07

    Applicant: Borealis AG

    Inventor： Andrey Buryak ,  Victor Sumerin ,  Franz Ruemer ,  Jari Aarila ,  Joy Jie Cheng

    IPC: C08F10/02 ,  C08F210/14 ,  C08L23/08 ,  C08F2/00 ,  C08K3/04

    CPC classification number: C08F10/02 ,  C08F210/14 ,  C08L23/0815 ,  C08F2/001 ,  C08K3/04 ,  C08L2203/18 ,  C08L2314/02 ,  C08K2201/019

    Abstract: The present invention relates to a polyethylene composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene-hexene-1 copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B) and wherein fraction (B) is present in an amount of from 51.0 to 58.5 wt. %, preferably 52.0 to 57.5 wt. %, more preferably 53.0 to 57.0 wt. % based on the total weight of the base resin, wherein fraction (B) of the base resin has a content of units derived from hexene-1 from 0.80 to 1.45 mol %, preferably of from 0.82 to 1.35 mol % and more preferably of from 0.85 to 1.30 mol %, wherein the base resin has a number average molecular weight Mn of 8,500 g/mol or higher, and wherein the polyethylene composition has a melt flow rate MFRs from 0.10 to 0.30 g/10 min, preferably from 0.15 to 0.28, and still more preferably from 0.16 to 0.25 g/10 min, to a process for producing the polyethylene composition, to an article, especially a pipe comprising the polyethylene composition and to the use of the polyethylene composition for the production of an article, especially a pipe.

    POLYETHYLENE COMPOSITION FOR HIGH PRESSURE RESISTANT PIPES
    13.
    发明申请
    POLYETHYLENE COMPOSITION FOR HIGH PRESSURE RESISTANT PIPES 有权

    公开(公告)号：US20220010046A1

    公开(公告)日：2022-01-13

    申请号：US17288804

    申请日：2019-10-23

    Applicant: BOREALIS AG

    Inventor： Yi Liu ,  Qizheng Dou ,  Victor Sumerin ,  Markku Vahteri ,  Thomas Hjertberg ,  Girish Suresh Gali ,  Alexandra Romina Albunia

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

    Abstract: The present invention relates to a polyethylene composition comprising a base resin having a density of from 950.0 kg/m3 to 962.0 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 9.0 g/10 min, determined according to ISO 1133 and a viscosity at a constant shear stress of 747 Pa eta747 of from 3500 kPa #s to 20000 kPa #s, 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, such as a pipe or pipe fitting.

    Process for producing polyethylene
    14.
    发明授权
    Process for producing polyethylene 有权

    公开(公告)号：US10800864B2

    公开(公告)日：2020-10-13

    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 (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 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 R′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 COMPOSITION AND A PROCESS FOR PRODUCTION OF THE POLYMER COMPOSITION
    15.
    发明申请
    POLYMER COMPOSITION AND A PROCESS FOR PRODUCTION OF THE POLYMER COMPOSITION 审中-公开

    公开(公告)号：US20190256695A1

    公开(公告)日：2019-08-22

    申请号：US16307593

    申请日：2017-06-20

    Applicant: BOREALIS AG

    Inventor： Yi Liu ,  Qizheng Dou ,  Victor Sumerin ,  Jani Aho ,  Jarmo Kela ,  Thomas Hjertberg ,  Anna Hjärtfors

    IPC: C08L23/08 ,  C08L23/06

    Abstract: A polymer composition comprising a base resin is disclosed herein. The base resin includes a first high molecular weight component, a low molecular weight component and a second high molecular weight component. The weight average molecular weight of the second high molecular weight component differs from the first high molecular weight component. The ratio of the weight and number average molecular weight of the first high molecular weight component is greater than 5. The first high molecular weight component has a density of equal or less than 930 kg/m3, and an intrinsic viscosity of equal or less than 15 dl/g, The base resin has a melt flow rate MFR5 of equal or less than 0.40 g/10 min and the composition has a viscosity at a shear stress of 747 Pa (eta747) of more than 700 kPas. Also a process for the production of a polymer composition is disclosed herein.

    Polyethylene composition for high pressure resistant pipes with improved homogeneity
    16.
    发明授权
    Polyethylene composition for high pressure resistant pipes with improved homogeneity 有权

    公开(公告)号：US12258465B2

    公开(公告)日：2025-03-25

    申请号：US17287579

    申请日：2019-10-22

    Applicant: BOREALIS AG

    Inventor： Yi Liu ,  Victor Sumerin ,  Qizheng Dou

    IPC: C08L23/08 ,  C08F2/00 ,  C08F4/02 ,  C08F210/16 ,  C08L23/0807

    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.

    ZIEGLER-NATTA CATALYSTS FOR OLEFIN POLYMERIZATION
    18.
    发明申请
    ZIEGLER-NATTA CATALYSTS FOR OLEFIN POLYMERIZATION 有权

    公开(公告)号：US20220363790A1

    公开(公告)日：2022-11-17

    申请号：US17764237

    申请日：2020-10-01

    Applicant: Borealis AG

    Inventor： Victor Sumerin ,  Georgy Kipiani

    IPC: C08F210/16

    Abstract: The present invention relates to tetrahydrofurfuryl derivatives and more particularly to their use as internal electron donors in Ziegler-Natta catalysts to obtain polymers with desirable properties. The present disclosure further concerns Ziegler-Natta catalyst components comprising said tetrahydrofurfuryl derivatives 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.

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