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    POLYOLEFIN COMPOSITION COMPRISING POLYPROPYLENE POLYMERS AND RECYCLED PLASTIC MATERIALS
    21.
    发明申请
    POLYOLEFIN COMPOSITION COMPRISING POLYPROPYLENE POLYMERS AND RECYCLED PLASTIC MATERIALS 审中-公开

    公开(公告)号：WO2022162042A1

    公开(公告)日：2022-08-04

    申请号：PCT/EP2022/051846

    申请日：2022-01-27

    Applicant: BOREALIS AG

    Inventor： KAHLEN, Susanne Margarete ,  BRAUN, Hermann ,  RÖSSLER-CZERMAK, Andreas ,  BENEDETTI, Giovanni Federico ,  KNAPEN, Philip

    IPC: C08L23/10 ,  C08L23/12 ,  C08L23/04

    Abstract: The present invention relates to a polyolefin composition comprising a) at least one heterophasic polypropylene copolymer with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least 40 g/10 min, preferably of at least 60 g/10 min; b) at least one polypropylene homopolymer with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least 400 g/10 min; and c) a blend (A) of recycled plastic material comprising polypropylene and polyethylene in a ratio between 3 : 7 and 12:1, which is recovered from a waste plastic material derived from post-consumer and/or post-industrial waste with a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least 5 g/10 min, wherein the polyolefin composition is characterized by a melt flow rate MFR2 (230°C, 2.16 kg, measured according to ISO 1133) of at least 20 g/10min.

    HIGHLY TRACK RESISTANT POLYETHYLENE COMPOSITIONS FOR WIRE AND CABLE APPLICATIONS
    23.
    发明申请
    HIGHLY TRACK RESISTANT POLYETHYLENE COMPOSITIONS FOR WIRE AND CABLE APPLICATIONS 审中-公开

    公开(公告)号：WO2022144282A1

    公开(公告)日：2022-07-07

    申请号：PCT/EP2021/087371

    申请日：2021-12-22

    Applicant: BOREALIS AG

    Inventor： EFRAIMSSON, Lars ,  LINDBOM, Lena ,  SULTAN, Bernt-Ake

    IPC: C08L23/08 ,  H01B3/44 ,  C08L43/04 ,  C08F210/16 ,  C08K3/22 ,  C08K3/26 ,  C08K5/00

    Abstract: The present invention relates to a crosslinkable polymer composition comprising (A) a high density ethylene homo- or copolymer having a density, determined according to ISO 1183, of at least 930 kg/m3, and (B) a copolymer of ethylene with a silane groups-containing comonomer having a content of silane groups- containing comonomer of not more than 4.0 wt%, wherein the polymer composition passes the tracking resistance test, determined according to IEC60587 (2007), method 2A at 4.5kV for 1h and 4.75 kV for 1h on compression molded plaques prepared according to ISO 11357. The present invention further relates to a track resistant wire or cable, preferably a power cable or an optical cable comprising at least one layer of the above polymer composition or to the use of the polymer composition in a wire or cable for increasing track resistance, and/or for increasing fire retardancy along the length of the wire or cable. The present invention further relates to a method for manufacturing the above polymer composition, comprising a step of compounding or dry blending the high density ethylene homo- or copolymer (A) and the copolymer of ethylene with a silane groups-containing comonomer (B).

    MODIFICATION OF POLYETHYLENE TERPOLYMER
    24.
    发明申请
    MODIFICATION OF POLYETHYLENE TERPOLYMER 审中-公开

    公开(公告)号：WO2022129409A1

    公开(公告)日：2022-06-23

    申请号：PCT/EP2021/086305

    申请日：2021-12-16

    Applicant: BOREALIS AG

    Inventor： WANG, Jingbo ,  BERNREITNER, Klaus ,  VAHTERI, Markku ,  BERGER, Friedrich

    IPC: C08F8/00 ,  C08K5/14 ,  C08J5/18 ,  C08J3/12 ,  C08L23/08

    Abstract: A process for the reduction of the MFR2 of a polyethylene comprising (i) combining a single site produced polyethylene terpolymer having an MFR2 (starting) of 0.5 to 10 g/10min and a density from 910 to 945 kg/m3 with a radical initiator to form a mixture; (ii) extruding the mixture of step (i) at a temperature above the melting point of the polyethylene terpolymer and at a temperature above the initiation temperature of the radical initiator to form pellets comprising a modified polyethylene terpolymer; wherein said pellets have a density of 910 to 945 kg/m3, a xylene hot insoluble content (XHU) of 0.3 wt% or less; an MFR2 (pellets) of 0.001 to 4.0 g/10min and wherein the MFR2 (pellets) is lower than MFR2 (starting) such that MFR2 pellets/MFR2 starting is 0.5 or less.

    PROCESS
    25.
    发明申请
    PROCESS 审中-公开

    公开(公告)号：WO2022112516A1

    公开(公告)日：2022-06-02

    申请号：PCT/EP2021/083210

    申请日：2021-11-26

    Applicant: BOREALIS AG

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

    IPC: C08F210/16 ,  C08F2/00 ,  C08J5/18

    Abstract: The invention provides a process for the preparation of a multimodal high density polyethylene (HDPE) having a density of greater than 950 kg/m3, 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%.

    CATALYST FEED SYSTEM
    26.
    发明申请
    CATALYST FEED SYSTEM 审中-公开

    公开(公告)号：WO2022111966A1

    公开(公告)日：2022-06-02

    申请号：PCT/EP2021/080598

    申请日：2021-11-04

    Applicant: BOREALIS AG

    Inventor： NYFORS, Klaus ,  KIVELÄ, Jouni ,  SATTAR, Mubashar ,  ZITTING, Samuli ,  ELOVAINIO, Erno ,  LYLYKANGAS, Mikko ,  LINDHOLM, Jan ,  COX, Danny

    IPC: B01J8/00

    Abstract: The present invention relates to a process for feeding a polymerization catalyst into a polymerization reactor, said process comprising the steps of: (i) forming a catalyst slurry comprising oil and a solid catalyst component in a first catalyst preparation vessel; (ii) transferring the catalyst slurry from the first catalyst preparation vessel to a first catalyst feed vessel; (iii) maintaining the catalyst slurry in the first catalyst feed vessel in a homogeneous state; (iv) withdrawing a portion of the catalyst slurry from the first catalyst feed vessel, preferably continuously withdrawing the catalyst slurry from the first catalyst feed vessel, and introducing the withdrawn portion of the catalyst slurry into a polymerization reactor; wherein the oil has a dynamic viscosity of from 25 to 1500 mPa*s at the conditions within the first catalyst preparation vessel and the first catalyst feed vessel, wherein the catalyst slurry is transferred along a substantially vertical path downwards from the first catalyst feed vessel to the reactor.

    POLYOLEFIN PIPE RESIN WITH VERY GOOD SAGGING AND SLOW CRACK GROWTH RESISTANCE
    28.
    发明申请
    POLYOLEFIN PIPE RESIN WITH VERY GOOD SAGGING AND SLOW CRACK GROWTH RESISTANCE 审中-公开

    公开(公告)号：WO2022090163A1

    公开(公告)日：2022-05-05

    申请号：PCT/EP2021/079556

    申请日：2021-10-25

    Applicant: BOREALIS AG

    Inventor： DOU, Qizheng ,  SUMERIN, Victor ,  POMAKHINA, Elena ,  ÄÄRILÄ, Jari

    IPC: C08L23/08 ,  C08L23/06 ,  C08F210/16 ,  C08F2/00

    Abstract: The invention relates to a polyethylene (PE) composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, wherein fraction (A) has melt flow rate, MFR2, from 100 to 600 g/10min; and (B) a second ethylene-1-hexene copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B) and wherein fraction (B) is present in an amount of from 50.0 to 58.0 wt.% based on the total weight of the base resin; wherein the base resin has a content of units derived from 1-hexene from 0.44 to 0.79 mol% based on the total amount of base resin; wherein the base resin has a molecular weight distribution, being the ratio of Mw/Mn, from 32 to 40 and the base resin has a Z average molecular weight, Mz, of more than 1,500 kg/mol; wherein the polyethylene composition has a melt flow rate MFR5 from 0.10 to 0.25 g/10min; and a melt flow rate ratio, FRR21/5, from 30 to 42; and wherein the polyethylene composition has a critical temperature, Tc, in the rapid crack propagation test of -10 °C or lower and not less than -25°C. The invention also relates to a PE composition obtainable by a multistage process, an article comprising a PE composition, a pipe and use of a PE composition comprising a base resin for producing an article.

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