A compound of formula (1) as drawn herein, wherein M is a Group 4 metal and each R independently is a silicon-free organic solubilizing group. A method of synthesizing the compound (1). A solution of compound (1) in alkane solvent. A catalyst system comprising or made from compound (1) and an activator. A method of polymerizing an olefin monomer with the catalyst system.

The present invention relates to a supported catalyst for propylene polymerization in which a first transition metal compound contributing to the production of crystalline polypropylene and a second transition metal compound contributing to the production of rubbery polypropylene are co-supported, and a method for producing a polypropylene resin using same. By using the supported catalyst, according to the present invention, it is possible to produce, by a single step of propylene polymerization, a polypropylene resin in which crystalline polypropylene and rubbery polypropylene are simultaneously formed.

The present disclosure relates to a polyethylene having high degree of crosslinking and a crosslinked polyethylene pipe including the same. The polyethylene according to the present disclosure has a high content of ultra-high molecular weight, and thus a crosslinking rate is improved, and thus a sufficient degree of crosslinking is exhibited even when the crosslinking time is shortened, thereby exhibiting excellent strength and pressure resistance characteristics.

This invention relates to polyolefin. More specifically, this invention relates to polyolefin that may exhibit improved mechanical properties such as excellent drop impact strength.

The polyethylene according to the present disclosure has a molecular structure having a narrow particle distribution and a low content of ultra-high molecular weight, so that a chlorinated polyethylene having excellent chlorination productivity and thermal stability may be prepared by reacting the polyethylene with chlorine. And, a PVC composition including the same with improved impact strength may also be prepared.

A catalyst compound and process for olefin polymerization. The catalyst can be represented by Formula (I): ##STR00001##
wherein: M is a transition metal selected from group 3, 4, or 5 of the Periodic Table of Elements; L is a linking group selected from any one or more difunctional C.sub.1-C.sub.20 hydrocarbyl, aryl or substituted aryl groups; T is an optional bridging group; each X is a univalent anionic ligand, or two Xs are joined and bound to the metal atom to form a metallocycle ring, or two Xs are joined to form a chelating ligand, a diene ligand, or an alkylidene ligand; R.sup.1 and R.sup.2 are each independently a hydrogen atom or substituted or unsubstituted C.sub.1 to C.sub.20 hydrocarbyl group; R.sup.3, R.sup.5, R.sup.6 and R.sup.7 are each independently a hydrogen atom or a substituted or unsubstituted C.sub.1 to C.sub.20 hydrocarbyl group, and, optionally, any two of R.sup.5, R.sup.6, and R.sup.7 can be joined to form a cyclic structure; R.sup.4 is a substituted or unsubstituted aryl group; and R.sup.8, R.sup.9, R.sup.10, and R.sup.11 are each independently a substituted or unsubstituted C.sub.1 to C.sub.6 hydrocarbyl group and, optionally, R.sup.9 and R.sup.10 are joined to form a cyclic structure.

The invention is related to film comprising a polypropylene composition showing improved coefficiency of friction as well as optical properties.

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.

A catalyst composition, a method from preparing an olefin polymer using the same, and an olefin polymer prepared from the same are disclosed herein. In some embodiments, a catalyst composition includes a first metallocene compound represented by the Chemical Formula 1, a second metallocene compound represented by the Chemical Formula 2, and a support. The catalyst composition can exhibit high activity in an olefin polymerization reaction and thus contribute to reducing catalyst costs, and can also exhibit high copolymerizability which can secure excellent processability and long-term physical properties, and thus, is suitable for providing polymers for pipes.

This invention relates to polymers comprising: one or more that include 1) at least 11 wt % 4 substituted 1,4 hexadiene and less than 20 wt % 5-methyl-1,4-hexadiene, based upon the weight of the polymer, and 2) optionally, one or more olefins; and processes to produces such polymers using metallocene or post-metallocene catalyst compounds.