Abstract: A copolymer of ethylene, a catalyst system suitable to prepare the copolymer, and a process to prepare such copolymer are described. The copolymer comprises from 60 to 80% by weight of ethylene and from 20 to 40% by weight of at least one first ?-olefin comonomer having n carbon atoms and at least one second ?-olefin comonomer having (n?1) carbon atoms, n being from 4 to 13, has a polydispersity Mw/Mn equal to or lower than 3.5, and a density from 0.855 to 0.880 g/cm3. The copolymer is obtained by subjecting ethylene and said at least one first ?-olefin comonomer to a polymerization stage in the presence of a catalyst system capable of forming a copolymer of ethylene and said at least one first ?-olefin comonomer having n carbon atoms, while forming the second ?-olefin comonomer having (n?1) carbon atoms.

Abstract: A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

Abstract: Process for supportation of a catalyst system comprising at least two different active catalyst components on a support wherein in an earlier supportation step a first active catalyst component is applied to the support at a first predetermined temperature and in a later supportation step a second active catalyst component is applied to the support at a temperature which is at least 20° C. lower than the first predetermined temperature.

Abstract: A novel gas phase polymerisation method is devised, for polymerisation of low and ultralow density polyethylene.

Abstract: An ethylene copolymer, a catalyst system suitable to prepare the ethylene copolymer, and a process to prepare such ethylene copolymer are described. The use of the ethylene copolymer as impact modifier in polyethylene and as compatibilizer in a polymer blend are also described. The ethylene copolymer has a density from 0.855 g/cm3 to 0.910 g/cm3, a polydispersity Mw/Mn lower than 3.5, comprises at least one first ethylene polymer component and at least one second ethylene polymer component having different comonomer contents so as to show at least two predetermined CRYSTAF peak temperatures.

Abstract: The present invention relates to non-symmetrical organometallic transition metal compounds of the compound of the formula (I) where R8 and R9 are identical or different and each an substituted or unsubstituted organic radical having from 1 to 40 carbon atoms, catalyst systems comprising at least one of the organometallic transition metal compounds of the present invention and a process for preparing polyolefins by polymerization or copolymerization of at least one olefin in the presence of one of the catalyst systems of the present invention.

Abstract: New plastomer material for use in automotive parts such as bumpers is devised here, which is a novel polyethylene produced by a gas phase process.

Abstract: The invention refers to a process for preparing a supported catalyst system for the polymerization of olefins comprising at least one active catalyst component on a support, the process comprising A) impregnating a dry porous support component with a mixture comprising at least one precatalyst, at least one cocatalyst, and a first solvent, such that the total volume of the mixture is from 0.8 to 2.0 times the total pore volume of the support component, and B) thereafter, adding a second solvent in an amount of more than 1.5 times the total pore volume of the support component. The invention refers further to a catalyst system made by this process and the use of this catalyst system for polymerization or copolymerization of olefins.

Abstract: A polymer filament or fiber comprising a polyethylene material (I) having the following features: a) a density of 0.900 g/cm3 or higher; b) a MI21 value of 25 g/10 min.; c) a MFR value from 25 to 60; the said fiber being stretched by drawing with a draw ratio from 1.5 to 10.

Abstract: The present invention relates to monohydroindacenyl complexes as active catalytic components in the copolymerization of ethylene. The complexes are suitable for direct preparation of ethylene copolymers having a narrow molecular distribution as well as the desired levels of low density and preferably a predetermined value of glass transition temperature Tg. The produced copolymers showing improved elastomeric performance can be prepared in a single step during polymerization reaction, thus avoiding a blending step following the polymerization step.

Abstract: Specific iron complexes (A), a catalyst system for polymerization of olefins comprising at least one metal complex (A) and/or (A?), a prepolymerized catalyst system, the use of these catalyst systems for the polymerization of olefins, and a process for the preparation of polyolefins by polymerization or copolymerization of olefins in the presence of one of the described catalyst systems.

Abstract: A terpolymer containing: a) from 90% to 50% by weight; preferably from 90% to 70% by weight of ethylene derived units; b) from 5% to 40% by weight; preferably from 5% to 20% by weight of derived units of alpha olefin of formula CH2?CHA wherein A is a C1-C20 alkyl radical; c) from 2% to 30% by weight, preferably from 5% to 20% by weight of cycloolefins derived units. Said terpolymer being characterized by the following features i) distribution of molecular weight Mw/Mn lower than 3.5; preferably lower than 3; more preferably lower than 2.7 ii) solubility in xylene at 25° C. higher than 99%.

Abstract: A novel polyethylene is devised which polyethylene is particularyl advantageous for manufacturing rotomoulded articles.

Abstract: A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

Abstract: A novel polyethylene is devised which polyethylene is particularly advantageous for manufacturing rotomoulded articles.

Abstract: The present invention relates to non-symmetrical organometallic transition metal compounds of the compound of the formula (I) where R8 and R9 are identical or different and each an substituted or unsubstituted organic radical having from 1 to 40 carbon atoms, catalyst systems comprising at least one of the organometallic transition metal compounds of the present invention and a process for preparing polyolefins by polymerization or copolymerization of at least one olefin in the presence of one of the catalyst systems of the present invention.

Abstract: The present invention relates to monohydroindacenyl complexes as active catalytic components in the copolymerization of ethylene. The complexes are suitable for direct preparation of ethylene copolymers having a narrow molecular distribution as well as the desired levels of low density and preferably a predetermined value of glass transition temperature Tg. The produced copolymers showing improved elastomeric performance can be prepared in a single step during polymerization reaction, thus avoiding a blending step following the polymerization step.

Abstract: An ethylene copolymer, a catalyst system suitable to prepare the ethylene copolymer, and a process to prepare such ethylene copolymer are described. The use of the ethylene copolymer as impact modifier in polyethylene and as compatibilizer in a polymer blend are also described. The ethylene copolymer has a density from 0.855 g/cm3 to 0.910 g/cm3, a polydispersity Mw/Mn lower than 3.5, comprises at least one first ethylene polymer component and at least one second ethylene polymer component having different comonomer contents so as to show at least two predetermined CRYSTAF peak temperatures.

Abstract: Process for supportation of a catalyst system comprising at least two different active catalyst components on a support wherein in an earlier supportation step a first active catalyst component is applied to the support at a first predetermined temperature and in a later supportation step a second active catalyst component is applied to the support at a temperature which is at least 20° C. lower than the first predetermined temperature.

Abstract: A multimodal ethylene copolymer having the following properties: i) density comprised in the range from 0.880 to 0.955 g/cm3; ii) total comonomer content ranging from 6% to 25% by weight; iii) content of 1-butene derived units ranging from 0 to 2% by weight; iv) Mw/Mn comprised from 4 to 20; v) intrinsic viscosity (decalin at 135° C. as determined according to EN ISO 1628-312003) comprised between 1.0 and 4.0 dL/g; said multimodal ethylene copolymer comprises from 10% to 80% by weight of a first polyethylene component and being detected at the Crystaf® apparatus at a temperature higher than 75° C. and from 90% to 20% by weight of a second polyethylene component being a copolymer being detected at a Crystaf® apparatus at a temperature lower than 75° C.; wherein said multimodal ethylene copolymer being fractionated into 12 fractions by means of the Holtrup analysis, the fractions containing more than 2% by weight of the total amount of material meet the following relationship: Cf/HDPE>?0.0075HDPE+0.