Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.

The present disclosure provides a drag reducing agent. In an embodiment, the drag reducing agent includes a polymer and a liquid carrier. The polymer is composed of one or more C.sub.6-C.sub.14 α-olefin monomers. The polymer includes a residual amount of zirconium. The polymer has an absolute weight average molecular weight (Mw.sub.(Abs)) greater than 1,300,000 g/mol and a (Mw.sub.(Abs)/Mn.sub.(Abs) from 1.3 to 3.0.

A supported metallocene catalyst can include a silica-based carrier and an aluminum alkyl halide, a cocatalyst compound, and a metallocene compound supported in the silica-based carrier. The aluminum alkyl halide is supported at higher rate on the surface of the silica-based carrier than inside the pores, and the cocatalyst compound is supported at higher rate inside the pores of the silica-based carrier than on the surface of the silica-based carrier. Such a supported metallocene catalyst can be prepared by: (i) supporting an aluminum alkyl halide in a silica-based carrier; (ii) supporting a cocatalyst compound in the silica-based carrier in which the aluminum alkyl halide is supported; and (iii) supporting a metallocene compound in the carrier in which the aluminum alkyl halide and the cocatalyst compound are supported. Such a supported metallocene catalyst can be used to polymerize polyolefins with excellent activity and polyolefin with a uniform powder morphology.

The present disclosure provides methods for producing an olefin polymer by contacting a C.sub.3-C.sub.40 olefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C.sub.3-C.sub.40 olefin-ethylene-diene terpolymer typically comprising from 30 to 55 mol % ethylene, from 69.09 to 45 mol % C.sub.3 to C.sub.40 comonomer, and from 0.01 to 7 mol % diene wherein the Tg of the terpolymer is −28° C. or less. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

The present invention provides a novel ligand compound, a transition metal compound and a catalyst composition including the same.

The present invention provides a novel ligand compound, a transition metal compound and a catalyst composition including the same.

A method of making an attenuated-light-off post-metallocene catalyst (“attenuated post-metallocene catalyst” or “attenuated P-M catalyst”), the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A1), (B.sup.1), or (C.sup.1): R.sup.5—C≡C—R.sup.6 (A.sup.1), (R.sup.5).sub.2C═C═C(R.sup.6).sub.2 (B.sup.1), or (R.sup.5)(R.sup.7)C═C(R.sup.6)(R.sup.7) (C.sup.1) as defined herein under effective reaction conditions to give an attenuated post-metallocene catalyst that exhibits an attenuated light-off kinetics profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a post-metallocene precatalyst (i.e., an unactivated “coordination entity” or “ligand-metal complex”) of structural formula (I): (D).sub.dM(T).sub.t(Q).sub.q(X).sub.x (I) as defined herein; and related methods, compositions and uses.

A method of making an attenuated-light-off post-metallocene catalyst (“attenuated post-metallocene catalyst” or “attenuated P-M catalyst”), the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A1), (B.sup.1), or (C.sup.1): R.sup.5—C≡C—R.sup.6 (A.sup.1), (R.sup.5).sub.2C═C═C(R.sup.6).sub.2 (B.sup.1), or (R.sup.5)(R.sup.7)C═C(R.sup.6)(R.sup.7) (C.sup.1) as defined herein under effective reaction conditions to give an attenuated post-metallocene catalyst that exhibits an attenuated light-off kinetics profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a post-metallocene precatalyst (i.e., an unactivated “coordination entity” or “ligand-metal complex”) of structural formula (I): (D).sub.dM(T).sub.t(Q).sub.q(X).sub.x (I) as defined herein; and related methods, compositions and uses.

A method of making an attenuated-light-off hybrid catalyst, the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A.sup.1), (B.sup.1), or (C.sup.1): R.sup.5—C≡C—R.sup.6 (A.sup.1), (R.sup.5).sub.2C═C═C(R.sup.6).sub.2 (B.sup.1), or (R.sup.5)(R.sup.7)C═C(R.sup.6)(R.sup.7) (C.sup.1) as defined herein under effective reaction conditions to give an attenuated hybrid catalyst that exhibits an attenuated light-off kinetics profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a hybrid precatalyst (i.e., an unactivated “coordination entity” or “ligand-metal complex”) of structural formula (I): (Cp) (L).sub.k(X).sub.x (I) as defined herein; and related methods, compositions and uses.

A method of making an attenuated-light-off hybrid catalyst, the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A.sup.1), (B.sup.1), or (C.sup.1): R.sup.5—C≡C—R.sup.6 (A.sup.1), (R.sup.5).sub.2C═C═C(R.sup.6).sub.2 (B.sup.1), or (R.sup.5)(R.sup.7)C═C(R.sup.6)(R.sup.7) (C.sup.1) as defined herein under effective reaction conditions to give an attenuated hybrid catalyst that exhibits an attenuated light-off kinetics profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a hybrid precatalyst (i.e., an unactivated “coordination entity” or “ligand-metal complex”) of structural formula (I): (Cp) (L).sub.k(X).sub.x (I) as defined herein; and related methods, compositions and uses.