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Process for Producing Multimodal Polyethylene in-situ Blends Including Ultra-High Molecular Weight Fractions
Process for Producing Multimodal Polyethylene in-situ Blends Including Ultra-High Molecular Weight Fractions
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机译:包括超高分子量组分的多峰聚乙烯原位共混物的生产方法
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摘要
The present application relates to a process for producing a multimodal polyethylene composition comprising the steps of polymerizing a polyethylene fraction (A-1) having a weight average molecular weight Mw of equal to or more than 500 kg/mol to equal to or less than 10,000 kg/mol and a density of equal to or more than 915 kg/m3 to equal to or less than 960 kg/m3 in one reaction step and polymerizing a polyethylene fraction (A-2) having a lower weight average molecular weight Mw as polyethylene fraction (A-1) and a density of equal to or more than 910 kg/m3 to equal to or less than 975 kg/m3 in a second reaction step of a sequential multistage process wherein one of said polyethylene fractions is polymerized in the presence of the other of said polyethylene fractions to form a first polyethylene resin (A) having a weight average molecular weight Mw of equal to or more than 150 kg/mol to equal to or less than 1,500 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 975 kg/m3, wherein the weight average molecular weight Mw of the first polyethylene resin (A) is lower than the weight average molecular weight Mw of the polyethylene fraction (A-1), blending the first polyethylene resin (A) with a second polyethylene resin (B) having a weight average molecular weight Mw of equal to or more than 50 kg/mol to less than 500 kg/mol, and a density of equal to or more than 910 kg/m3 to equal to or less than 970 kg/m3 to form said 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 polymerization step.
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机译:本发明涉及一种生产多峰聚乙烯组合物的方法,该方法包括将重均分子量Mw等于或大于500kg / mol的聚乙烯级分(A-1)聚合至等于或小于10,000的步骤。 kg / mol且密度等于或大于915 kg / m 3 Sup>至等于或小于960 kg / m 3 Sup>,并且可以聚合聚乙烯重均分子量Mw比聚乙烯馏分(A-1)低,且密度等于或大于910 kg / m 3 Sup>等于或小于975的馏分(A-2) kg / m 3 Sup>在顺序多步法的第二个反应步骤中,其中一个所述聚乙烯级分在另一个所述聚乙烯级分的存在下聚合,形成具有重均分子量Mw等于或大于150 kg / mol至等于或小于1,500 kg / mol,且密度为等于或大于910 kg / m 3 Sup>等于或小于975 kg / m 3 Sup>,其中第一聚乙烯树脂的重均分子量Mw(A )低于聚乙烯级分(A-1)的重均分子量Mw,将第一聚乙烯树脂(A)与重均分子量Mw等于或大于50的第二聚乙烯树脂(B)共混kg / mol至小于500 kg / mol,且密度等于或大于910 kg / m 3 Sup>至等于或小于970 kg / m 3 Sup>形成所述多峰聚乙烯组合物,其中所述多峰聚乙烯组合物的熔体流动速率MFR 5 Sub>(190℃,5kg)为0.01至10g / 10min,并且密度等于或大于大于或等于910kg / m 3,等于或小于970kg / m 3,可通过所述方法获得的聚乙烯组合物和所述第一聚合步骤的聚乙烯树脂。
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