POLYMER COMPOSITION SUITABLE FOR MAKING FILMS

    公开(公告)号:WO2022207738A1

    公开(公告)日:2022-10-06

    申请号:PCT/EP2022/058468

    申请日:2022-03-30

    Applicant: BOREALIS AG

    Abstract: The present invention relates to a polymer composition comprising at least the following components: (A) 30.0 to 80.0 wt.-% based on the overall weight of the polymer composition of a single-site catalyst produced C2C3 heterophasic copolymer (HECO); whereby said copolymer has a melting point in the range of 150 to 162°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 5.0 to 40.0 g/10 min; a total C2-content in the range of 1 to 10 wt.-% based on the overall weight of component (A); and a soluble fraction (SF) based on the total weigh of component (A) in the range of 10 to 50 wt.-% determined according to CRYSTEX QC, Polymer Char as described in the description; 20.0 to 70.0 wt.- % based on the overall weight of the polymer composition of a propylene homopolymer; whereby said propylene homopolymer has a MFR2 (190°C, 2.16 kg) determined according to ISO 1133 in the range of 1.0 to 20.0 g/10 min; and a F30 melt strength determined according to ISO 16790 of at least 10 cN; with the proviso that the weight proportions of components A) and B) add up to 100 wt.-%. Furthermore, the invention relates to a film comprising the polymer composition according to the invention and to coated articles comprising at least one layer comprising said polymer composition.

    POLYMER COMPOSITION HAVING IMPROVED IMPACT STRENGTH AT LOW TEMPERATURES

    公开(公告)号:WO2021191466A1

    公开(公告)日:2021-09-30

    申请号:PCT/EP2021/058154

    申请日:2021-03-29

    Abstract: The present invention relates to a polymer composition comprising: (a) a propylene- based polymer having a melt mass-flow rate of ≥ 5.0 and ≤ 90.0 g/10 min, preferably ≥ 10.0 and ≤ 50.0 g/10 min, as determined in accordance with ASTM D1238 (2013) at 230°C under a load of 2.16 kg; and (b) ≥ 5.0 and ≤ 30.0 wt%, with regard to the total weight of the polymer composition, of an ethylene-based polymer having: • a melt mass-flow rate of ≥ 3.0 and ≤ 30.0 g/10 min, as determined in accordance with ASTM D1238 (2013) at 190°C under a load of 2.16 kg; • a density of ≥ 840 and ≤ 870 kg/m3, as determined in accordance with ASTM D792 (2008); and • a content of ≥ 25.0 and ≤ 50.0 wt% of moieties derived from 1-octene, with regard to the total weight of the ethylene- based polymer. Such polymer composition demonstrates improved low temperature impact strength, determined as Izod impact strength at -40 °C and/or at -30°C, as well as desirable toughness, determined as tensile modulus, whilst having good flowability in injection moulding and thereby allowing complex, thin-walled objects to be shaped.

    PROPYLENE POLYMER COMPOSITION
    9.
    发明申请

    公开(公告)号:WO2021197761A1

    公开(公告)日:2021-10-07

    申请号:PCT/EP2021/055710

    申请日:2021-03-08

    Inventor: TARTARI, Davide

    Abstract: A polypropylene composition comprising: A) From 96 wt% to 80 wt%; of a propylene homopolymer having a fraction insoluble in xylene at 25°C greater than 90 wt%; and a melt flow rate, MFR, measured according to ISO 1133 at 230°C with a load of 2.16 kg comprised between 80.0 g/10 min and 300.0 g/10 min; B) From 4 wt% to 20 wt%; of a propylene ethylene copolymer having an ethylene derived units content ranging from 18 wt% to 38 wt%; said polypropylene composition having: a melt flow rate, MFR, measured according to ISO 1133 at 230°C with a load of 2.16 kg, comprised between 80.0 g/10 min and 150.0 g/10 min; the sum of the amounts of A) and B) being 100 wt%.

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