Polypropylene-polyethylene composition with improved toughness

    公开(公告)号:US12163013B2

    公开(公告)日:2024-12-10

    申请号:US17607609

    申请日:2020-04-28

    Applicant: Borealis AG

    Abstract: A polymer composition including: A) 70-97 wt.-% of a polymer blend, including a1) 50-95 wt.-% polypropylene; a2) 5-50 wt.-% polyethylene; B) 3-30 wt.-% of a copolymer of propylene and 1-hexene, including b1) 30-70 wt.-% of a first random copolymer of propylene and 1-hexene; and b2) 30-70 wt.-% of a second random copolymer of propylene and 1-hexene having a higher 1-hexene content than the first random propylene copolymer b1); the weight proportions of components al) and a2) are 100 wt.-%; the weight proportions of components b1) and b2) are 100 wt.-%; component A) has a MFR2 of from 1.0-50.0 g/10 min; component B) has a 1-hexene content in the range of 2.0-8.0 wt.-% based on the overall weight of component B); and the polymer composition is free from plastomers being an elastomeric copolymer of ethylene and 1-octene having a density of from 0.860-0.930 g/cm3.

    UPGRADED RECYCLED POLYETHYLENE POLYPROPYLENE BLEND

    公开(公告)号:US20220127439A1

    公开(公告)日:2022-04-28

    申请号:US17284952

    申请日:2019-10-29

    Applicant: BOREALIS AG

    Abstract: A polyethylene-polypropylene composition obtainable by blending a) 80 to 97 wt.-% of a blend (A) comprising A-1) polypropylene and A-2) polyethylene, wherein the weight ratio of polypropylene to polyethylene is from 3:7 to 7:3, and wherein blend (A) is a recycled material, which is recovered from a waste plastic material derived from post-consumer and/or industrial waste; and b) 3 to 20 wt.-% of a compatibilizer (B) being a C2C8 plastomer, having—a DSC melting point of below 75° C. (ISO11357);—an MFR2 (ISO1133, 2.16 kg load at 190° C.) of equal or below 1.5 g/10 min; and—a density of equal or lower than 885 kg/m3 (ISO1183),wherein the ratio of MFR2 (blend (A) (ISO1133, 2.16 kg load at 230° C.)/MFR2(compatibilizer (B) (ISO1133, 2.16 kg load at 190 ° C.), is in the range 3.0 to 15; and c) 0 to 1.0 wt.-% of a stabilizer or mixture of stabilizers.

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