Abstract: The invention is related to a polyethylene composition comprising an ethylene polymer having a density in the range from ?950 kg/m3 to ?958 kg/m3, determined according to ISO 1183-1:2004, a melt flow rate MFR 5 (190° C., 5 kg) in the range from ?0.16 g/10 min to ?0.26 g/10 min, determined according to ISO 1133:1997, a melt flow ratio FRR (190° C., 21.6/5 kg) in the range from ?22 to ?40, a complex viscosity at 100 rad/s and 190° C. (eta100) of at least 2500 Pa·s and a complex viscosity at 0.01 rad/s and 190° C. (eta0.01) of at least 250000 Pa·s.

Abstract: The invention is directed to polyethylene having a density in the range?940 and ?960 kg/m3, Melt Flow Rate 190/21.6?1.5 and ?4.0 g/10 min at 190 degrees Celsius and MWD?3 and ?12. The polyethylene is applied in the production of pipes.

Abstract: The present invention relates to a catalyst system for the production of polyethylene comprising: I) the reaction product obtained by reacting a) a hydrocarbon solution comprising: i. a magnesium-containing compound selected from an organic oxygen-containing magnesium compound and/or a halogen-containing magnesium compound; and ii. an organic oxygen-containing titanium compound wherein the molar ratio of magnesium:titanium is lower than 3:1; and b) an organo aluminium halide having the formula AlRnX3-n in which R is a hydrocarbon moiety containing 1-10 carbon atoms, X is a halogen and 0<n<3; II) an aluminium compound having the formula AlR?3, in which R? is a hydrocarbon moiety containing 1-10 carbon atoms; and III) one or more of an electron donor selected from the group of 1,2-dialkoxy hydrocarbon compounds wherein the molar ratio of supplied organo aluminium halide I)b) to supplied titanium in I)a) in the preparation of I) is between 5.0 and 7.

Abstract: The invention is directed to polyethylene having a density in the range?940 and ?960 kg/m3, Melt Flow Rate 190/21.6?1.5 and ?4.0 g/10 min at 190 degrees Celsius and MWD?3 and ?12. The polyethylene is applied in the production of pipes.

Abstract: The present invention relates to a catalyst system for the production of polyethylene comprising: I) the reaction product obtained by reacting a) a hydrocarbon solution comprising: i. a magnesium-containing compound selected from an organic oxygen-containing magnesium compound and/or a halogen-containing magnesium compound; and ii. an organic oxygen-containing titanium compound wherein the molar ratio of magnesium: titanium is lower than 3:1; and b) an organo aluminium halide having the formula AlRnX3-n in which R is a hydrocarbon moiety containing 1-10 carbon atoms, X is a halogen and 0<n<3; II) an aluminium compound having the formula AlR?3, in which R? is a hydrocarbon moiety containing 1-10 carbon atoms; and III) one or more of an electron donor selected from the group of 1,2-dialkoxy hydrocarbon compounds wherein the molar ratio of supplied organo aluminium halide I)b) to supplied titanium in I) a) in the preparation of I) is between 5.0 and 7.

Abstract: The invention is directed to polyethylene having a multimodal molar mass distribution, having a density in the range from 940 to 948 kg/m3, having an MFI 190/5 in the range from 1.0 to 3.5 g/10 min and comprising from 45 to 47% by weight of an ethylene copolymer A and from 53 to 55% by weight of an ethylene copolymer B, where all percentages are based on the total weight of the composition wherein ethylene-1-butene copolymer A has a viscosity number in the range between 70 and 110 cm3/g and a density between 960 and 973 kg/m3. The polyethylene is suitable to be applied in pipe coating applications.