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    PROCESS FOR RECYCLING PROPYLENE-ETHYLENE COPOLYMERS
    41.
    发明公开
    PROCESS FOR RECYCLING PROPYLENE-ETHYLENE COPOLYMERS 审中-公开

    公开(公告)号：US20240002559A1

    公开(公告)日：2024-01-04

    申请号：US18247342

    申请日：2021-09-27

    Applicant: Borealis AG

    Inventor： Jingbo WANG ,  Markus GAHLEITNER ,  Klaus BERNREITNER ,  Pauli LESKINEN ,  Johanna LILJA ,  Anita LUYTEN

    IPC: C08F210/06 ,  B29B17/00 ,  B29C48/00 ,  B29C48/04 ,  B29C48/36 ,  B29C48/92 ,  B29D22/00 ,  B29C45/00

    CPC classification number: C08F210/06 ,  B29B17/00 ,  B29C48/022 ,  B29C48/04 ,  B29K2105/26 ,  B29C48/92 ,  B29D22/003 ,  B29C45/0001 ,  B29C48/36

    Abstract: The present invention provides a process for recycling propylene-ethylene copolymers to obtain polymers having good optical and mechanical properties, as well as good processability. The invention further provides propylene-ethylene copolymer pellets obtained from the process, articles comprising or consisting of such pellets and the use of the propylene-ethylene copolymer pellets for injection molding applications. The process comprising the steps of (a) polymerizing propylene and ethylene in the presence of a single site catalyst in a continuous polymerization reactor under dynamic conditions, (b) collecting the resulting propylene-ethylene copolymer powders from step (a) to obtain a mixture (M) of propylene-ethylene copolymer powders having a MFR2 (ISO 1133, 230° C., 2.16 kg) in a raffle of from 1.5 to 80.0 g/ 10 min and an ethylene content in a range of from 1.0 to 4.0 wt. % based on the total weight of the mixture (M), (c) compounding said mixture (M) in an extruder in the presence of a radical initiator, and a clarifying agent in an amount of from 0.01 to 1.0 wt. %, based on the total weight of the mixture of propylene-ethylene copolymer powders, and (d) extruding the above mixture into pellets; wherein, in step a), the dynamic conditions are such that the ethylene content and the melt flow rate (MFR2) of the resulting copolymer gradually changes from a first predetermined ethylene content, E1, to a second predetermined ethylene content, E2, and from a first predetermined melt flow rate, MFR2-1, to a second predetermined melt flow rate, MFR2-2; wherein collecting the copolymer powders in step b) is started when the polymer produced in step a) has a first ethylene content, E1, and a melt flow rate MFR2-1, and collecting the copolymer powders in step b) is stopped when the polymer produced in step a) has a second ethylene content, E2, and a melt flow rate MFR2-2; and wherein said pellets obtained in step d) have (i) a MFR2 (ISO 1133, 230° C., 2.16 kg) in the range of from 20 to 120 g/10 in, (ii) a ratio of MFR2 pellets/MFR2 powder>1, (iii) an ethylene content in a range of from 1.0 to 4.0 wt %, (iv) a crystallization temperature Tc, determined by DSC according to ISO 11357-3:1999 in the range of from 100 to 125° C., and (v) a flexural modulus, determined in a 3-point-bending according to ISO 178 on injection molded specimens of 80×10×4 mm, prepared in accordance with EN ISO 1873-2, of 850 MPa or more.

    POLYMER COMPOSITION FOR MOULDED ARTICLE
    42.
    发明公开
    POLYMER COMPOSITION FOR MOULDED ARTICLE 审中-公开

    公开(公告)号：US20230279199A1

    公开(公告)日：2023-09-07

    申请号：US18017506

    申请日：2021-07-23

    Applicant: BOREALIS AG

    Inventor： Konrad GEBAUER ,  Anna Maria HARTL ,  Jingbo WANG ,  Markus GAHLEITNER ,  Lionel DELAVIERE

    IPC: C08K5/20 ,  C08K5/00 ,  C08K5/3417 ,  C08K3/34

    CPC classification number: C08K5/20 ,  C08K5/0083 ,  C08K5/3417 ,  C08K3/34

    Abstract: Polyethylene composition comprising a) at least 89.0 wt. % of a multimodal polyethylene polymer; b) optionally 0.01 to 10.0 wt.-% of a colour pigment or a colour masterbatch comprising a colour pigment; c) 0.01 to 1.0 wt.-% of a nucleating agent of formula (I) or a nucleating agent of formula (II) wherein A=mono- or bicyclic aryl group; each X is independently a —CO—NH— group or —NH—CO— group; R1 to R3 are each independently a C1-C20 alkyl optionally substituted by one or more hydroxyl groups; C2-C20 alkenyl optionally substituted by one or more hydroxyl groups; C2-C20 alkyl interrupted by oxygen or sulfur; C3-C12 cycloalkyl optionally substituted by one or more C1-C20 alkyl; C3-C12 cycloalkyl-C1-6-alkylene- wherein the C3-12 cyclokalkyl is optional substituted by one or more C1-C20 alkyl groups.

    POLYMER COMPOSITION SUITABLE FOR MAKING BLOWN FILMS
    43.
    发明申请
    POLYMER COMPOSITION SUITABLE FOR MAKING BLOWN FILMS 有权

    公开(公告)号：US20220363880A1

    公开(公告)日：2022-11-17

    申请号：US17765907

    申请日：2020-09-30

    Applicant: BOREALIS AG

    Inventor： Jingbo WANG ,  Markus GAHLEITNER ,  Klaus BERNREITNER ,  Pauli LESKINEN

    IPC: C08L23/14 ,  C08J5/18

    Abstract: The present invention relates to a polymer composition comprising at least the following components: A) 70.0 to 95.0 wt.-% based on the overall weight of the polymer composition of a C2C3 random copolymer; whereby said C2C3 random copolymer has a melting point in the range of 110 to 140° C. determined by differential scanning calorimetry according to ISO 11357-3; a MFR2 (230° C., 2.16 kg) determined according to ISO 1133 in the range of 0.5 to 4.0 g/10 min; and a total C2-content in the range of 1 to 10 wt.-% based on the overall weight of the C2C3 random copolymer; B) 5.0 to 30.0 wt.-% based on the overall weight of the polymer composition of a LDPE; whereby said LDPE has a density determined according to ISO 1183 in the range of 915 to 922 kg/m3; and a MFR2 (190° C., 2.16 kg) determined according to ISO 1133 in the range of 0.9 to 20.0 g/10 min; with the proviso that the weight proportions of components A) and B) add up to 100 wt.-%. In addition, the present invention refers to the articles, preferably blown films made of said polymer composition

    RANDOM PROPYLENE POLYMER COMPOSITION AND USE IN EXTRUSION BLOW MOULDING
    46.
    发明申请
    RANDOM PROPYLENE POLYMER COMPOSITION AND USE IN EXTRUSION BLOW MOULDING 有权

    公开(公告)号：US20220073718A1

    公开(公告)日：2022-03-10

    申请号：US17423407

    申请日：2020-01-15

    Applicant: BOREALIS AG

    Inventor： Jingbo WANG ,  Markus GAHLEITNER ,  Friedrich BERGER ,  Karlheinz FRIEDRICH

    IPC: C08L23/14 ,  C08F2/00 ,  C08F210/02 ,  C08F210/14 ,  C08F4/646 ,  C08F4/649 ,  C08F4/654 ,  B29C49/04

    Abstract: The present invention is directed to a propylene polymer composition comprising at least one propylene copolymer (C-PP), and an α-nucleating agent (NU), wherein the propylene copolymer (C-PP) comprises two propylene copolymer fractions (PP1) and (PP2), wherein propylene copolymer fraction (PP1) is contained in the propylene copolymer (C-PP) in an amount of 30 to 70 wt. % and the propylene copolymer fraction (PP2) is contained in the propylene copolymer (C-PP) in an amount of 70 to 30 wt. %, the comonomer content of propylene copolymer fraction (PP1) is in the range of 0.5 to 2.5 wt.-% and the comonomer content of the propylene copolymer fraction (PP1) is lower compared to the comonomer content of the propylene copolymer fraction (PP2), and the propylene polymer composition has (a) a melt flow rate MFR2 (230° C.) measured according to according to ISO 1133 of 1 to 5 g/10 min., and (b) a comonomer content of 4.0 to 8.0 wt. %, the comonomer(s) being ethylene and/or at least one C4 to C12 α-olefin. The above propylene polymer composition has improved impact and optical properties. The invention further provides a method of producing the above propylene polymer composition and an extrusion blow molded article comprising the above propylene polymer composition.

    PROCESS FOR PRODUCING HETEROPHASIC COPOLYMERS OF PROPYLENE
    50.
    发明申请
    PROCESS FOR PRODUCING HETEROPHASIC COPOLYMERS OF PROPYLENE 审中-公开

    公开(公告)号：US20180244904A1

    公开(公告)日：2018-08-30

    申请号：US15552466

    申请日：2016-02-18

    Applicant: BOREALIS AG

    Inventor： Pauli LESKINEN ,  Johanna LILJA ,  Jingbo WANG ,  Markus GAHLEITNER

    IPC: C08L23/14 ,  C08F10/06 ,  F16L9/12

    Abstract: The present invention provides a process for producing a heterophasic copolymer composition. The polymerisation is conducted in the presence of an olefin polymerisation catalyst comprising a solid catalyst component further comprising titanium, magnesium, halogen and an internal donor, and a cocatalyst, the process comprising the steps of: (1) introducing streams of the solid catalyst component, the cocatalyst, propylene monomer and hydrogen into a first polymerisation reactor; (2) producing a first polymer of propylene in the first polymerisation reactor, the first polymer of propylene having a first melt flow rate MFR 2 of from 0.1 to 2.0 g/10 min; (3) withdrawing a stream comprising the first polymer of propylene from the first polymerisation reactor and passing it to a second polymerisation reactor; (4) introducing a stream of propylene monomer into the second polymerisation reactor; (5) producing a first polymer mixture comprising the first polymer of propylene and a second polymer of propylene in the second polymerisation reactor, the first polymer mixture having a second melt flow rate MFR2 of from 0.05 to 1.0 g/10 min and which second melt flow rate is less than the first melt flow rate; (6) withdrawing a stream comprising the first polymer mixture from the second polymerisation reactor and passing it to a third polymerisation reactor; (7) introducing streams of propylene monomer and the comonomer into the third polymerisation reactor; (8) producing the heterophasic copolymer composition comprising the first polymer mixture and a third copolymer of propylene in the third polymerisation reactor, the heterophasic copolymer composition having a third melt flow rate MFR2 of from 0.05 to 1.0 g/10 min, said heterophasic copolymer having a content of comonomer units of from 5 to 25% by mole; wherein the amount of xylene soluble fraction in the heterophasic copolymer determined according to ISO 16152 is from 14 to 35% by weight and intrinsic viscosity measured from the amorphous polymer (AM) of the heterophasic copolymer is from 1.5 to 4.4 dl/g; and (9) recovering the heterophasic copolymer composition from the third polymerisation reactor; characterised in that the internal donor is a compound having the structure according to formula (I); wherein R1 and R2 are the same or different being a linear or branched C1-C12-alkyl group and R is hydrogen or a linear, branched or cyclic C1 to C12-alkyl.

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