Borealis

The present invention relates to a method for providing a recycled plastics extrudate RE with a desired color value and color distribution from recycled plastics flakes RF comprising the following steps: providing a stream of recycled mixed-color plastics flakes RF, measuring the color values of at least a part of the stream of the recycled mixed-color plastics flakes RF and determining the color distribution from the measured color values, predicting the color values of the recycled plastics extrudate RE based on the measured color values of the recycled mixed-color plastics flakes RF by applying a color prediction tool CPT, pre-adjusting the color values of the recycled mixed-color plastics flakes RF by changing the color composition of the recycled mixed-color plastics flakes RF to meet the desired color values of the recycled plastics extrudate RE by removing at least one color fraction of the recycled mixed-color plastics flakes RF in at least one sorting unit from at least a part of the stream of the recycled mixed-color plastics flakes RF and/or by adding at least one color fraction of plastics flakes to the recycled mixed-color plastics flakes RF during homogenization; homogenizing the color pre-adjusted recycled mixed-color plastics flakes RF; and extruding the color pre-adjusted recycled plastics flakes RF to obtain the recycled plastics extrudate RE with the desired color values while measuring the final color of the recycled plastics extrudate RE.

The present invention relates to a power cable comprising a conductor, an inner semiconductive layer, an insulation layer and an outer semiconductive layer, obtainable by a process comprising the steps of a) preparing a semiconductive polypropylene composition (S-PP), which comprises a first heterophasic copolymer of propylene and ethylene (HECO1), carbon black and a dielectric fluid comprising at least one alkylaryl hydrocarbon, b) preparing a polypropylene composition (I-PP), which comprises a second heterophasic copolymer of propylene and ethylene (HECO2) and is free of a dielectric fluid, c) coating the conductor with an inner semiconductive layer comprising the semiconductive polypropylene composition (S-PP); d) coating the inner semiconductive layer with an insulation layer comprising the polypropylene composition (I-PP), and e) coating the insulation layer with an outer semiconductive layer comprising the semiconductive polypropylene composition (S-PP),a process for producing the power cable, andthe use of the dielectric fluid comprising at least one alkylaryl hydrocarbon in the semiconductive composition (S-PP) for increasing the Weibull alpha-value of the power cable to a value of at least 35 kV/mm.

The present invention relates to a high density polyethylene composition, comprising (A) from 60 to 97 wt.-%, based on the total weight of the high density polyethylene composition, of a high density multimodal polyethylene copolymer having a polymer density of at least 950 kg/m³ and a MFR₅ determined according to ISO 1133 (190 °C, 5 kg) of not more than 0.50 g/10 min, and (B) from 3 to 40 wt.-%, based on the total weight of the high density polyethylene composition, of an ultra-high molecular weight polyethylene homopolymer having a nominal viscosity molecular weight Mv of 2,000,000 to 5,000,000 g/mol different from component (A); and wherein said high density multimodal polyethylene copolymer (A) comprises a copolymer of ethylene with at least one alpha olefin comonomer having from 4 to 12 carbon atoms, and said high density polyethylene composition has an MFR₂₁ of 3.0 g/10 min or less and a density of at least 958 kg/m³ including pigments, if present. The invention further relates to a process for the preparation of the above high density polyethylene composition and to an article, preferably a pipe or a pipe fitting comprising the high density polyethylene composition.

The present invention relates to a power cable comprising a conductor, an inner semiconductive layer, an insulation layer and an outer semiconductive layer, obtainable by a process comprising the steps of a) preparing a semiconductive polypropylene composition (S-PP), which comprises a first heterophasic copolymer of propylene and ethylene (HECO1), carbon black and a wax of copolymer propylene and ethylene, b) preparing a polypropylene composition (I-PP), which comprises a second heterophasic copolymer of propylene and ethylene (HECO2) and is free of a dielectric fluid, c) coating the conductor with an inner semiconductive layer comprising the semiconductive polypropylene composition (S-PP); d) coating the inner semiconductive layer with an insulation layer comprising the polypropylene composition (I-PP), and e) coating the insulation layer with an outer semiconductive layer comprising the semiconductive polypropylene composition (S-PP),a process for producing the power cable, andthe use of a wax of a copolymer of propylene and ethylene in the semiconductive composition (S-PP) for increasing the Weibull alpha-value of the power cable to a value of at least 35 kV/mm.

The present invention relates to a polyolefin blend with a good balance between stiffness and toughness. The polyolefin blend has (i) a melt flow rate MFR<2> (ISO 1133, 230 °C, 2.16 kg) in the range of from 1.0 to 20.0 g/10 min; and (ii) a Charpy Notched Impact Strength (ISO 179-1eA, 23 °C) of more than 4.0 kJ/m<2>; and it comprises (A) 80 to 98 wt.-% of a recycled polyethylene-polypropylene composition (A) with specific characteristics; and (B) 2 to 20 wt.-% of a specifically selected polypropylene (B). The present invention further relates to a method of preparing the polyolefin blend, an article comprising the same and the use of the polyolefin blend in automotive and/or packaging applications. Still further, the present invention is directed to the use of the polypropylene (B) for improving the balance between stiffness and toughness of a recycled polyethylene-polypropylene composition (A) by blending both components.

The present invention relates to a method for monitoring a polymerization process in near real time by use of a fast GPC analysis method. Furthermore, a computer-implemented method for digitally reproducing and optionally controlling a polymerization process is provided. Additionally, the present invention is directed to an apparatus for digital reproduction and optional control of a polymerization process, a system comprising the apparatus and further comprising at least one polymer production facility and the use of a computational model and fast gel permeation chromatography (GPC) for digitally reproducing and optionally controlling a continuous polymerization process.

A polyethylene composition comprising a polymer of ethylene that consists of a first ethylene polymer fraction and a second ethylene polymer fraction, which are both defined by their density and melt flow rate, and a further multimodal polymer of ethylene, as well as to films comprising said polyethylene composition.

The present invention is directed to a multimodal polyethylene, to a process for producing said multimodal polyethylene, and to films comprising said multimodal polyethylene.

A polyethylene composition comprising a polymer of ethylene that consists of a first ethylene polymer fraction and a second ethylene polymer fraction, which are both defined by their density and melt flow rate, and one or more metal dicarboxylate salts according to formula (I), as well as to films comprising said polyethylene composition:

This disclosure relates to a polyethylene composition comprising a metallocene-catalysed multimodal polyethylene wherein the metallocene-catalysed multimodal polyethylene comprises: (i) from 40 to 52 wt%, based on the total weight of the metallocene-catalysed multimodal polyethylene, of a first polyethylene component (A), optionally wherein the first polyethylene component (A) is a polyethylene homopolymer, and (ii) from 48 to 60 wt%, based on the total weight of the metallocene-catalysed multimodal polyethylene, of a second polyethylene component (B), optionally wherein the second polyethylene component (B) is a polyethylene copolymer, wherein the first polyethylene component (A) has a density (ISO 1183-1:2019 method A) in the range of from 945 to 970 kg/m<3>, and a MFR<2> (190°C, 2.16 kg, ISO 1133) in the range of from 0.2 to 10 g/10 min; the second polyethylene component (B) has a density (ISO 1183-1:2019 method A) in the range of from 900 to 930 kg/m<3>, and wherein the polyethylene composition has a density (ISO 1183-1:2019 method A) of 935 to 960 kg/m<3>; and a MFR<5> (190°C, 5.0 kg, ISO 1133) in the range from 0.5 to 3.0 g/10min. This disclosure further relates to use of the polyethylene composition, a process for preparing the polyethylene composition, and a pipe or pipe fitting comprising the polyethylene composition.