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    Process for producing multimodal polyethylene blends including ultra-high molecular weight components
    6.
    发明授权
    Process for producing multimodal polyethylene blends including ultra-high molecular weight components 有权

    公开(公告)号：US10597470B2

    公开(公告)日：2020-03-24

    申请号：US15539125

    申请日：2015-12-21

    申请人： BOREALIS AG

    发明人： Bernd Kretzschmar ,  Carl-Gustaf Ek ,  Thomas Rätzsch ,  Yi Liu ,  Sandeep Tyagi

    IPC分类号： C08L23/06 ,  C08L23/00 ,  C08F10/02 ,  C08L23/04 ,  C08F2/00

    摘要： The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of blending a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 700 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 920 kg/m3 to equal to or less than 960 kg/m3 and a polyethylene fraction (A-2) having a lower Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 with a weight ratio of (A-1) to (A-2) of 45:55 to 80:20 to form a first polyethylene resin (A) having a Mw of equal to or more than 200 kg/mol to equal to or less than 1500 kg/mol, a melt flow rate MFR5 (190° C., 5 kg) of 0.001 to 10 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3, blending the first polyethylene resin (A) with a second polyethylene resin (B) having a Mw of equal to or more than 50 kg/mol to less than 700 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 to form the multimodal polyethylene composition, wherein the multimodal polyethylene composition a melt flow rate MFR5 (190° C., 5 kg) of 0.01 to 10 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3, a polyethylene composition obtainable by said process and the polyethylene resin of said first blending step.

    Process for producing multimodal polyethylene blends including ultra-high molecular weight components
    9.
    发明授权
    Process for producing multimodal polyethylene blends including ultra-high molecular weight components 有权

    公开(公告)号：US10774202B2

    公开(公告)日：2020-09-15

    申请号：US15512186

    申请日：2015-12-21

    申请人： Borealis AG

    发明人： Carl-Gustaf Ek ,  Thomas Ratzsch ,  Bernd Kretzschmar

    IPC分类号： C08L23/06 ,  C08J3/00

    摘要： The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of at least partially melting a first polyethylene resin (A) having a viscosity average molecular weight My of equal to or more than 700 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 920 kg/m3 to equal to or less than 960 kg/m3 in a first homogenizing device, at least partially melting a second polyethylene resin (B) having a Mw of equal to or more than 50 kg/mol to less than 700 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 960 kg/m3 in a second homogenizing device, combining the at least partially molten first polyethylene resin (A) with the at least partially molten second polyethylene resin (B) in said second homogenizing device, compounding the combined first polyethylene resin (A) and second polyethylene resin (B) in said second homogenizing device to form a multimodal polyethylene composition, wherein the multimodal polyethylene composition has a melt flow rate MFR5 (190° C., 5 kg) of 0.01 to 10.0 g/10 min and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3 and a polyethylene composition obtainable by said process.