Provided are a novel metallocene compound, a catalyst composition including the same, and a method of preparing a polyolefin using the same. The metallocene compound according to the present invention and the catalyst composition including the same may be used for the preparation of a polyolefin, may have excellent polymerization ability, and may produce a polyolefin having an ultra-high molecular weight. In particular, when the metallocene compound according to the present invention is employed, an olefin-based polymer having an ultra-high molecular weight may be polymerized because the metallocene compound shows high polymerization activity even when it is supported on a support.

The present invention provides a metallocene complex capable of producing a homopolypropylene having a high melting point in the homopolymerization of propylene, and a production method of an olefin polymer using the same. The metallocene complex of the present invention is represented by formula [I].

The hybrid supported metallocene catalyst according to the present disclosure comprises at least one first metallocene compound selected from compounds represented by the following Chemical Formula 1; and at least one second metallocene compound selected from compounds represented by the following Chemical Formula 3, and exhibits high activity in propylene polymerization and is useful for preparing polypropylene having high melt tension through the introduction of long chain branches (LCB) into polypropylene molecules, and a method for preparing a polypropylene using the same, ##STR00001##
wherein all the variables are described herein.

The present invention relates to polyolefin that has high molecular weight, wide molecular weight distribution and high long chain branch content, and thus, has excellent environmental crack resistance and processibility. The polyolefin of the present invention has excellent processibility and stability, and thus, may be preferably used as a food container, a bottle cap, and the like.

The present invention relates to a method for preparing polyolefin that can easily and effectively prepare polyolefin having high molecular weight and various molecular weight distributions, which was difficult to prepare using the existing metallocene catalyst, and polyolefin prepared thereby. The method for preparing polyolefin comprises the step of polymerizing olefin monomers, in the presence of a metallocene supported catalyst wherein a metallocene compound having a specific chemical structure is supported in a carrier, and hydrogen gas.

The present invention relates to a method of preparing an olefin-based polymer including a step of polymerizing an olefin monomer in the presence of a catalyst composition including a cis isomer and a trans isomer. According to the method of preparing an olefin-based polymer according to an embodiment of the present invention, similar level of density and molecular weight may be exhibited with a relatively smaller amount of octene when compared to that of a common polymer. Thus, a stable olefin-based polymer having good copolymerization properties may be prepared.

An ethylene/alpha-olefin copolymer and method for preparing the same is disclosed herein. In some embodiments, an ethylene/alpha-olefin copolymer satisfying the following conditions, (a) a density of 0.85 to 0.89 g/cc, (b) a molecular weight distribution of 1.5 to 2.3, (c) a melting temperature of 85 C. or less, and (d) a free volume proportional constant (C.sub.2) of 600 or less. The ethylene/alpha-olefin copolymer has high volume resistance and light transmittance.

The invention provides a metallocene-catalysed multimodal ethylene-1-butene random copolymer, having a density in the range of from 910 to 930 kg/m3, an MFR.sub.2 determined according to ISO 1133 at 190 C. and 2.16 kg in the range of from 0.1 to 3.0 g/10 min, a 1-butene content in the range of 1.0 to 20 wt %, an isolated 1-butene comonomer unit amount (EBE %) of greater than 97.0%, whereby the isolated 1-butene comonomer unit amount is calculated according to formula (I), wherein EBE represents amount of comonomer sequence of ethylene, 1-butene and ethylene per 1000 carbon (kCb), EBB represents amount of comonomer sequence of ethylene, 1-butene and 1-butene per 1000 carbon (kCb) and BBB represents amount of comonomer sequence of three consecutive 1-butenes per 1000 carbon (kCb) as described under Determination methods; and a ratio of the MFR.sub.21 determined according to ISO 1133 at 190 C. and 21.6 kg to MFR.sub.2 determined according to ISO 1133 at 190 C. and 2.16 kg, MFR.sub.21/MFR.sub.2, in the range of 22 to 100.

[00001]$\begin{array}{cc}\mathrm{EBE}\%=100\frac{EBE}{EBE+EBB+BBB}& \left(I\right)\end{array}$

The present disclosure relates to a polyethylene, which is reacted with chlorine to prepare a chlorinated polyethylene having improved tensile strength and excellent processability during extrusion by optimizing a low molecular region in a molecular structure, and a CPE compound including the same.

The present disclosure relates to an ethylene/1-hexene copolymer having excellent flexibility and processability and useful for manufacturing high-pressure heating pipes, PE-RT pipes or large-diameter pipes.