The present invention relates to a supported metallocene catalyst including a novel single metallocene compound having excellent polymerization activity, and a process for producing a polypropylene having excellent processability and broad molecular weight distribution using the same.

Provided is an ethylene/alpha-olefin copolymer having excellent environmental stress crack resistance.

Disclosed are catalyst systems comprising the reaction product of at least the following A) a procatalyst; and B) at least one cocatalyst structure selected from the following i) through iii), i) at least one cocatalyst comprising an anion having Structure 1 as shown below (Structure 1) as described herein; or ii) at least one cocatalyst comprising an anion having Structure 2 as shown below (Structure 2) as described herein; or iii) a combination of i and ii.

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The present disclosure provides bridged metallocene catalyst compounds including at least two SiSi bridges, catalyst systems including such compounds, and uses thereof. Catalyst compounds of the present disclosure can be hafnium-containing compounds having one or more cyclopentadiene ligand(s) substituted with one or more silyl neopentyl groups and linked with at least two SiSi-containing bridges. In another class of embodiments, the present disclosure is directed to polymerization processes to produce polyolefin polymers from catalyst systems including one or more olefin polymerization catalysts, at least one activator, and an optional support.

The present disclosure relates to bridged metallocene catalysts that include at least one indenyl ligand substituted at the 2-position with a C.sub.3-C.sub.10 branched alkyl, such as isopropyl. Catalyst systems including the catalysts, polymerization processes using the catalysts, and polymers made using the catalysts are also described.

Polyethylene compositions including at least 65 wt % ethylene derived units, based upon the total weight of the polyethylene composition, are provided.

The present invention relates to polyethylene resin having excellent impact strength, and more specifically, to polyethylene resin exhibiting excellent impact strength and flexural strength, when prepared into a molded product.

The present invention relates to a novel metallocene catalyst compound for the production of a polyolefin resin having a high molecular weight and a wide molecular weight distribution or a method of preparing the same, and more particularly to a metallocene catalyst compound using a ligand containing a Group 15 or 16 element having a bulky substituent or a method of preparing the same. The present invention provides a novel metallocene catalyst compound represented by Chemical Formula 1 below.

(L.sup.1){(N-L.sup.2)Z.sup.1(Y)Z.sup.2(N-L.sup.3)}(X)M[Chemical Formula 1]

The ethylene/1-hexene copolymer according to the present invention has excellent processability and mechanical properties, and thus can be applied to various fields such as food containers.

The present invention relates to a supported hybrid catalyst system for ethylene slurry polymerization and a method for preparing ethylene polymer therewith. The supported hybrid catalyst system according to the present invention may exhibit high activity during ethylene slurry polymerization, and enables preparation of an ethylene polymer having a narrow molecular weight distribution but excellent processability.