A crosslinked metallocene-catalyzed polyethylene copolymer having a higher molecular weight (HMW) component and lower molecular weight (LMW) component wherein the HMW component is present in an amount of from about 10 wt. % to about 30 wt. % and wherein the LMW component is present in an amount of from about 70 wt. % to about 90 wt. %.

The invention relates to a process for production of terpolymers, in particular for the polymerization of propylene, and two other distinct monomers chosen from a group comprising ethylene and a C4-C12 -olefin in a horizontal stirred reactor comprising an agitated bed and several reaction zones for forming polymer particles.

A method is disclosed for producing a catalyst, which suppresses a decrease in polymerization activity due to early deactivation of the active site after the catalyst has been formed, exhibits excellent catalyst activity at the time of polymerization of olefins, and can produce polymers of olefins, which are excellent in stereoregularity. The method for producing a catalyst includes contacting a solid catalyst component (A) containing magnesium, titanium, halogen and an internal electron-donating compound, and a specific organoaluminum compound (B) represented by the general formula (I), with each other, wherein at least one selected from the solid catalyst component (A) and the organoaluminum compound (B) is previously subjected to contact treatment with a hydrocarbon compound having one or more vinyl groups, in an organic solvent containing 30% by mass or more of one or more compounds selected from saturated aliphatic hydrocarbon compounds having 20 or more carbon atoms.

Provided herein are methods of polymerizing -olefin monomer with a catalyst and hydrogen in a slurry to produce low molecular weight polyolefins. Hydrogen is vented from the low molecular weight polyolefins and then the low molecular weight polyolefins are further polymerized in a gas phase to produce a polyolefin having a molecular weight distribution of between 4.0 and 30 and a flexural modulus between 1500 mPa and 2500 mPa.

Provided herein are methods of polymerizing -olefin monomer with a catalyst and hydrogen in a slurry to produce low molecular weight polyolefins. Hydrogen is vented from the low molecular weight polyolefins and then the low molecular weight polyolefins are further polymerized in a gas phase to produce a polyolefin having a molecular weight distribution of between 4.0 and 30 and a flexural modulus between 1500 mPa and 2500 mPa.

The present disclosure is related to activator compounds represented by:
[Ar(E.sup.1R.sup.1R.sup.2H).sub.x(E.sup.2R.sup.3R.sup.4).sub.y][QR.sup.5R.sup.6R.sup.7R.sup.8].sub.z
In the formula Ar is a C.sub.6-C.sub.30 aromatic hydrocarbyl group, provided that if Ar is a multicyclic ring, then each E.sup.1 and each E.sup.2 are substitutions on a single ring. Also, x is 1 to 4; y is 0 to 3; z=x; and x+y is 2 to 6. Each of E.sup.1 and E.sup.2 are independently selected from nitrogen or phosphorous and Q is selected from group 13 of the Periodic Table of the Elements. Additionally, each of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently selected from C.sub.1-C.sub.40 aliphatic hydrocarbyl, substituted C.sub.1-C.sub.40 aliphatic hydrocarbyl and each of R.sup.5, R.sup.6, R.sup.7, and R.sup.8 is independently a C.sub.6-C.sub.24 hydrocarbyl or a C.sub.6-C.sub.24 substituted hydrocarbyl. The present disclosure also relates to catalyst systems including a catalyst and the activator compound. Also, the present disclosure relates to methods of polymerizing olefins.

The present invention relates to a process for preparing a hybrid catalyst for olefin polymerization, to a hybrid catalyst for olefin polymerization, and to a polyolefin. The supported hybrid metallocene catalyst for olefin polymerization prepared by the process for preparing a supported hybrid metallocene catalyst for olefin polymerization according to an embodiment of the present invention is capable of preparing a polyolefin having a broad molecular weight distribution of bimodal characteristics and being excellent in mechanical strength and processability.