Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.

Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.

Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.

Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.

Abstract: Compatibilised polyolefin compositions combining the positive properties of their respective components by using an olefinic di- or triblock copolymer as compatibiliser to generate a finely dispersed phase structure in the molten state and to improve adhesion between the blend components in the solid state, while not compromising processability of the polyolefin composition.

Abstract: A process for forming tactic polymers employing at least one olefin polymerization catalyst comprising a non-racemic mixture of the R- and S-enantiomers of a metal complex containing at least one asymmetrically substituted (chiral) carbon atom, and a chain shuttling agent, a polar aprotic organic compound, or both a chain shuttling agent and a polar aprotic organic compound.

Abstract: A process for forming a high molecular weight, multi-block copolymer comprising two or more chemically distinguishable segments or blocks, the process comprising polymerizing one or more olefin monomers in the presence of a chain shuttling agent and a catalyst composition comprising two or more olefin polymerization catalysts capable of preparing polymers having differing chemical or physical properties under equivalent polymerization conditions, or a catalyst composition comprising at least one olefin polymerization catalyst containing multiple active catalyst sites capable of preparing polymers having differing chemical or physical properties.

Abstract: A process for forming tactic polymers employing at least one olefin polymerization catalyst comprising a non-racemic mixture of the R- and S-enantiomers of a metal complex containing at least one asymmetrically substituted (chiral) carbon atom, and a chain shuttling agent, a polar aprotic organic compound, or both a chain shuttling agent and a polar aprotic organic compound.

Abstract: A process for forming a high molecular weight, multi-block copolymer comprising two or more chemically distinguishable segments or blocks, the process comprising polymerizing one or more olefin monomers in the presence of a chain shuttling agent and a catalyst composition comprising two or more olefin polymerization catalysts capable of preparing polymers having differing chemical or physical properties under equivalent polymerization conditions, or a catalyst composition comprising at least one olefin polymerization catalyst containing multiple active catalyst sites capable of preparing polymers having differing chemical or physical properties

Abstract: A heterogeneous catalyst component obtainable by contacting: (a) a solid Lewis acid of formula MR1a wherein M is a metal of group 1-12 of the Periodic Table of the Elements; R1 is a fluorine, chlorine, bromine or iodine atom; and a is equal to the valence of the metal M; and (b) at least one ionic compound of formula (I) [((T)pR2)nMI(R3)m]?[D]+(I) wherein: MI is an element belonging to group 13 of the Periodic Table of the Elements; R3, equal to or different from each other, are halogen atoms, halogenated C6-C20 aryl and halogenated C7-C20 alkylaryl groups; two R1 groups, can also form with the element M one condensed ring; R2, equal to or different from each other, are hydrocarbon groups; T is a Lewis base in its neutral form; n ranges from 1 to 4; m ranges from 0 to 3; and m+n=4; p ranges from 1 to 10; and [D]+ is a monovalent cation.

Abstract: The present invention discloses an active metallocene catalyst system prepared with a hafnium-based metallocene catalyst system and an activating agent comprising an aluminoxane and a sterically hindered Lewis base.

Abstract: The invention provides a method for the production of a non-linear polyolefin, which method comprises: (a) providing a polyolefin having a ratio of internal to terminal double bonds of at least 1:1 and; (b) forming a non-linear polyolefin from the polyolefin provided in step (a).