Borealis

Ethylene-1-butene copolymers with an improved property profile, e.g. an improved balance of unsaturation levels, narrow molecular weight distribution, a low density and ultralow molecular weight. The invention further relates to a solution polymerization process using specific catalyst systems for preparing these ethylene-1-butene copolymers. The invention also relates to the use of these ethylene-1-octene copolymers for hot melt adhesive applications.

The present invention relates to a mixed virgin polyethylene / recycled polyethylene composition having a melt flow rate MFR₂ (ISO 1133:2022, 2.16 kg, 190 °C) in the range of from 0.10 to less than 1.00 g/10 min and a density (ISO 1183-1:2019) in the range of from 946 to 980 kg/m³, the composition comprising A) a recycled polyethylene fraction (rPE), wherein the recycled polyethylene fraction is present in an amount of 40 wt.-% or more, based on the total weight of the mixed virgin polyethylene / recycled polyethylene composition, and wherein the recycled polyethylene fraction (rPE) has a content of titanium (Ti) of from 500 to 5,000 ppm, determined by X-ray fluorescence (XRF) spectroscopy as described herein and based on the total weight of the recycled polyethylene fraction (rPE), B) a virgin polyethylene fraction comprising at least a first virgin polyethylene component (vPE1), C) at least 0.3 wt.-% of one or more pigment(s), preferably carbon black (CB), and D) one or more metal deactivator(s), wherein the mixed virgin polyethylene / recycled polyethylene composition has, as determined by quantitative ¹³C{¹H} NMR spectroscopy as described herein: a) a total amount of ethylene units (C2 units) of at least 90.0 wt.-%, and b) a total amount of continuous propylene units (C3 units) in the range of from 0.1 to 5.0 wt. - % .The present invention further relates to a method of preparing the mixed virgin polyethylene / recycled polyethylene composition, an article comprising the same and the use of the mixed virgin polyethylene / recycled polyethylene composition for wire and/or cable jacketing applications.

The present invention provides a composition comprising: recycled polymer comprising at least 60 wt.% of recycled polypropylene, based on the total weight of the recycled polymer, and a magnesium oxide in an amount in a range of 0.1 to 15 wt.%, based on the total weight of the composition. The present invention further provide a process for preparing said composition. The present invention further provides a use of a magnesium oxide for reducing the emission of one or more volatile organic compounds from a recycled polymer.

The present invention relates to a mixed virgin polyethylene / recycled polyethylene composition having a melt flow rate MFR<2> (ISO 1133:2022, 2.16 kg, 190 °C) in the range of from 0.10 to less than 1.00 g/10 min; and a density (ISO 1183-1:2019) in the range of from 940 to 980 kg/m<3>, the composition comprising A) a recycled polyethylene fraction comprising at least a first recycled polyethylene component (rPE1), wherein the recycled polyethylene fraction is present in an amount of 40 wt.-% or more, based on the total weight of the mixed virgin polyethylene / recycled polyethylene composition, and B) a virgin polyethylene fraction comprising at least a first virgin polyethylene component (vPE1), wherein the first virgin polyethylene component (vPE1) has a melt flow rate MFRs (ISO 1133:2022, 5 kg, 190 °C) of up to 0.50 g/10 min, a density (ISO 1183-1:2019) in the range of from 942 to 975 kg/m<3>, and is present in an amount of 15 wt.-% or more, based on the total weight of the mixed virgin polyethylene / recycled polyethylene composition, wherein the mixed virgin polyethylene / recycled polyethylene composition has, as determined by quantitative <13>C{<1>H} NMR spectroscopy as described herein: (a) a total amount of ethylene units (C2 units) of at least 90 wt.-%, and (b) a total amount of continuous propylene units (C3 units) in the range of from 0.1 to 5.0 wt.-%. The present invention further relates to a method of preparing the mixed virgin polyethylene / recycled polyethylene composition, an article comprising the same and the use of the mixed virgin polyethylene / recycled polyethylene composition for wire and cable jacketing applications.

The present invention relates to a polypropylene composition comprising a first propylene polymer (A) and a second propylene polymer (B), wherein the comonomer content of the second propylene polymer (B) is higher than the comonomer content of the first propylene polymer (A), the total weight content of the first propylene polymer (A) and the second propylene polymer (B) is at least 95.0 wt.-%, based on the total weight of the polypropylene composition, and the polypropylene composition has a total comonomer content of from 0.05 to 0.75 wt.-%, a melt flow rate MFR₂ of from 15.0 to 40.0 g/10 min, a xylene cold solubles (XCS) fraction of from 0.5 to 5.0 wt.-%, and a ratio of weight average molecular weight to number average molecular weight Mw/Mn of from 7.0 to 14.0,a process for producing said polypropylene composition,an article comprising said polypropylene composition, andthe use of said polypropylene composition for the production of fiber articles molded articles and/or for extrusion coating.

The present invention relates to a solid-state polymer electrolyte composition comprising an ethylene copolymer containing at least 20 wt% (based on the overall weight of the ethylene copolymer) of an oxygen containing comonomer, and at least one Lithium salt.

A method for performing a pressure control in a gas phase reactor system, a control system for executing the method for performing the pressure control in the gas phase reactor system, and the gas phase reactor system are provided. The method comprises a second-valve adjustment step, in which an opening pressure of a second valve for discharging a discharge mixture from a gas phase reactor to a recovery area is adjusted to a value equal to or higher than an opening pressure of a first valve for the supply to the gas phase reactor. Thereby, the gas phase reactor can be operated in a pressure range between the first-valve opening pressure and the second-valve opening pressure, and a workload placed on the recovery area of the gas phase reactor system is decreased.

The present invention provides a flame retardant polyolefin composition comprising at least one crosslinkable polyolefin base resin containing hydrolysable silane groups (A), at least one silanol condensation catalyst (B) being an inorganic tin (II) compound in which a tin atom has no covalent bond to a carbon atom, and at least one flame retardant inorganic filler (C), which can be efficiently crosslinked even at ambient temperature. Moreover, the present invention provides the use of tin (II) oleate, tin (II) neodecanoate or mixtures thereof for crosslinking a polyolefin composition containing at least one crosslinkable polyolefin base resin containing hydrolysable silane groups, under ambient conditions and a process for producing a crosslinked article and a cable or wire.

The present invention relates to a device for producing a polypropylene pipe comprising a pre-cooling system, which is situated between the die head and the calibration sleeve unit,a process for producing preparing a polypropylene pipe comprising the step of cooling the not yet hardened polypropylene pipe using a pre-cooling system downstream of the die head before entering the calibration sleeve unit for adjusting the outer diameter of the not yet hardened polypropylene pipe,the use of said pre-cooling system in said device for reducing the temperature of the not yet hardened polypropylene pipe to a temperature of below 210°C,the use of said pre-cooling system in said device for increasing the line speed of the device andthe use of said pre-cooling system in said device for reducing the impact failure rate of polypropylene pipes compared to polypropylene pipes produced on a extrusion line without pre-cooling system, each produced at the same line speed, by at least 20%, determined according to ISO 9854-1-1994, Part 1 at 0°C and -5°C.

A process for producing a solid Ziegler-Natta catalyst component is described. The process comprises the steps : I. providing a solution of a Group 2 metal dihalide (IUPAC, Nomenclature of Inorganic Chemistry, 2005) by dissolving a solid Group 2 metal dihalide starting material in an alcohol mixture comprising a monohydric alcohol (A1) of formula ROH, where R is selected from a hydrocarbyl group of 3 to 16 carbon atoms and an second alcohol (A2) comprising in addition to the hydroxyl group an ether moiety, wherein the ether moiety comprises from 2 to 18 carbon atoms, preferably the second alcohol (A2) is a C2 to C4 glycol monoether, wherein the solid Group 2 metal dihalide starting material in an the alcohol mixture is heated to above 80 °C, preferably 90 °C to 160 °C, more preferably 100 °C to 140 °C, wherein the heating is conducted under a flow of an inert gas, preferably under a flow of nitrogen gas; II. contacting the solution of the Group 2 metal dihalide of step I with a compound in a liquid form of a transition metal of Group 4 to 10 of the Periodic Table (IUPAC, Nomenclature of Inorganic Chemistry, 2005), or of a lanthanide or actinide, preferably a transition metal of Group 4 to 6 of the Periodic Table (IUPAC, Nomenclature of Inorganic Chemistry, 2005); and III. recovering the solid catalyst component; wherein the amount of Group 2 metal originating from Group 2 metal dihalide constitutes 100 % of the whole amount of the Group 2 metal used in the process for producing the solid Ziegler-Natta catalyst component. The invention also relates to a Ziegler-Natta catalyst component obtainable by the process and also a Ziegler-Natta catalyst comprising the Ziegler-Natta catalyst component. The invention further relates to a process for producing polymers from a-olefins in the presence of the Ziegler-Natta catalyst and use of the Ziegler-Natta catalyst component for producing of C2 to C10 olefin polymers and copolymers thereof.