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    A PROPYLENE-ETHYLENE RANDOM COPOLYMER WITH HIGHLY RANDOMIZED ETHYLENE DISTRIBUTION
    105.
    发明申请
    A PROPYLENE-ETHYLENE RANDOM COPOLYMER WITH HIGHLY RANDOMIZED ETHYLENE DISTRIBUTION 有权

    公开(公告)号：US20240409734A1

    公开(公告)日：2024-12-12

    申请号：US18698834

    申请日：2022-10-11

    Applicant: BOREALIS AG

    Inventor： Jingbo Wang ,  Markus Gahleitner ,  Klaus Bernreitner ,  Pauli Leskinen

    IPC: C08L23/14 ,  C08J5/18

    Abstract: A monophasic propylene-ethylene random copolymer composition (R-PP), comprising: a) 30 to 70 wt.-% of a first propylene-ethylene random copolymer fraction (R-PP1), having an ethylene content in the range from 0.1 to 5.0 mol-%; b) 30 to 70 wt.-% of a second propylene-ethylene random copolymer fraction (R-PP2), having an ethylene content in the range from 0.1 to 10.0 mol-%; wherein [C2(R-PP)]/[C2(R-PP1)] is more than or equal to 1.00, having a melting temperature in the range from 120 to 145° C., a content of 2, 1-regiodefects in the range from 0.05 to 1.40 mol-%, a relative content of isolated to block ethylene sequences, I(E) of more than or equal to 70.0% and fulfilling inequation (I): I(E)−3.79[C2(R-PP)]≥52.0 (I).

    PROCESS FOR PRODUCING A PROPYLENE COPOLYMER
    107.
    发明申请
    PROCESS FOR PRODUCING A PROPYLENE COPOLYMER 有权

    公开(公告)号：US20240392043A1

    公开(公告)日：2024-11-28

    申请号：US18694621

    申请日：2022-09-15

    Applicant: BOREALIS AG

    Inventor： Pauli Leskinen ,  Jingbo Wang ,  Markus Gahleitner ,  Klaus Bernreitner ,  Antonina Kupareva

    IPC: C08F2/01 ,  C08F2/14 ,  C08F2/34 ,  C08F4/659 ,  C08F4/6592 ,  C08F255/02

    Abstract: Process for the production of a polypropylene random copolymer (PP), the process comprising the steps of polymerising in a first reactor (R1) propylene and a comonomer (C1a) selected from a C4 to C8 α-olefin in the presence of a first metallocene catalyst (MC1) yielding a first polypropylene copolymer (PP1), wherein the ratio of the feed of the comonomer (C1a) to the feed of propylene is in the range of 1 to 100 mol/kmol and the MFR2 of the first polypropylene copolymer (PP1) is in the range of 0.01 to 100 g/10 min; transferring the first polypropylene copolymer (PP1) to a second reactor (R2); polymerising in the second reactor (R2) and in the presence of said first polypropylene (PP1), propylene, a comonomer (C1b) selected from a C4 to C8 α-olefin, and a second metallocene catalyst (MC2) yielding a second polypropylene copolymer (PP2), wherein the ratio of the feed of the comonomer (C1b) to the feed of propylene is in the range of 40 to 150 mol/kmol and the MFR2 of the second polypropylene copolymer (PP2) is in the range of 0.01 to 100 g/10 min; withdrawing the polypropylene random copolymer (PP) comprising the first polypropylene copolymer (PP1) and the second polypropylene copolymer (PP2) from the second reactor (R2); wherein the first metallocene catalyst (MC1) and/or the second metallocene catalyst (MC2) is a metallocene catalyst (MC) comprising a metallocene complex, and wherein the metallocene catalyst (MC) comprises a support comprising silica.

    A HOMOPOLYMER-RANDOM COPOLYMER BLEND HAVING A BENEFICIAL BALANCE OF OPTICAL AND MECHANICAL PROPERTIES
    108.
    发明公开
    A HOMOPOLYMER-RANDOM COPOLYMER BLEND HAVING A BENEFICIAL BALANCE OF OPTICAL AND MECHANICAL PROPERTIES 审中-公开

    公开(公告)号：US20240360302A1

    公开(公告)日：2024-10-31

    申请号：US18685735

    申请日：2022-08-31

    Applicant: BOREALIS AG

    Inventor： Jingbo Wang ,  Markus Gahleitner ,  Klaus Bernreitner ,  Pauli Leskinen

    IPC: C08L23/14

    CPC classification number: C08L23/14 ,  C08L2205/025 ,  C08L2314/06

    Abstract: A monophasic polypropylene composition (PC), having a melt flow rate (MFR2) of 1.0 to 50.0 g/10 min, comprising: a) 55.0 to 95.0 wt.-% of a random copolymer of propylene (R-PP) having an MFR2 of 1.0 to 30.0 g/10 min, a comonomer content of 0.5 to 6.0 mol-%, and a content of 2,1-regiodefects of 0.1 to 1.4 mol-%; and b) 5.0 to 45.0 wt.-% of a propylene homopolymer composition (H-PP), comprising a reactor blend of a propylene homopolymer and a polymeric nucleating agent that is present in an amount of 20 to 300 wt-ppm, wherein the propylene homopolymer composition (H-PP) has an MFR2 of 10 to 100 g/10 min and is free from 2,1-regiodefects; wherein the combined weight of the random copolymer of propylene (R-PP) and the propylene homopolymer composition (H-PP) is at least 95 wt.-%.

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