Lg Chem, Ltd

Jong-Sang Park

Ki-Soo Lee

Heon-Yong Kwon

Dae-Sik Hong

Seon-Kyoung Kim

Joon-Hee Cho

Min-Seok Cho

Yong-Ho Lee

Nicola Maggiarosa

Hyeon-Gook Kim

Yong-Gyu Han

Byung-Ryul Lee

Yong Ho Lee

Eun-Jung Lee

Choong-Hoon Lee

Seung-Whan Jung

Ki-Su Ro

Joon Hee Cho

Man-Seong Jeon

Eun-Kyoung Song

Yong Gyu Han

Manseong Jeon

Eunkyoung Song

A polyolefin has 1) a density in the range of 0.93 to 0.97 g/cm, 2) a BOCD (Broad Orthogonal Co-monomer Distribution) index defined by a given equation in the range of 1 to 5, and 3) a molecular weight distribution (weight average molecular weight/number average molecular weight) in the range of 4 to 10. A supported hybrid metallocene catalyst comprises a first metallocene compound represented by a first given formulae, a second metallocene compound represented by one of three given formulae, and a support.

Polyolefin and preparation method thereof

The present invention relates to a novel metallocene compound, a catalyst composition comprising the same, and to olefinic polymers produced using the same. The metallocene compound according to the present invention and the catalyst composition comprising the same can be used when producing olefinic polymers, have outstanding copolymerization properties, and can produce olefinic polymers of high molecular weight. In particular, when the metallocene compound according to the present invention is employed, highly heat resistant block copolymers can be produced, and olefinic polymers can be produced which have a high melting point (Tm) even if the comonomer content is increased when producing the olefinic polymer.

Metallocene compound, catalyst composition comprising the same, and an olefinic polymer produced using the same

The present invention relates to an amine bridged metallocene catalyst, a method for producing the same, and a method for producing an ethylene-alpha olefin copolymer, which comprises polymerizing ethylene and alpha olefin in the presence of an olefin polymerization catalyst composition including a metallocene catalyst. The amine bridged metallocene catalyst may be produced by reacting one or more of substituted or unsubstituted cyclopentadiene and substituted or unsubstituted fluorene with amine to bridge them with nitrogen, and reacting them with a transition metal to coordinate them.

Amine bridged metallocene catalyst, method for preparing thereof and method for polymerizing ethylene-alpha olefin copolymer using amine bridged metallocene catalyst

The present invention provides a non-metallocene transition metal compound that is easily produced, includes a tetrazol group having the high polymerization activity and high temperature stability in the polymerization of olefins, and a catalytic composition that includes the transition metal compound and a cocatalyst. In addition, the present invention provides a method for efficiently producing an olefin homopolymer or copolymer by using the catalytic composition.

Non-metallocene catalysts having tetrazol group for olefin polymerization and polymerizing method of olefin using the same

The present invention relates to a synthesis method of metal cyclopentadienide by direct reaction of dicyclopentadiene with a group 1 metal in the presence of an aprotic solvent. Unlike the conventional method depending on retro Diels-Alder reaction of dicyclopentadiene to generate indirectly cyclopentadiene, the method of the present invention favors generation of cyclopentadiene and metal cyclopentadienide as well by adding dicyclopentadiene directly when the reaction temperature reaches to the boiling point of a reaction solvent.

Synthesis method of metal cyclopentadienide in bulk

The present invention provides a new supported catalyst for olefin polymerization prepared by reacting a novel transition metal compound on a cocatalyst-supported support, in which the transition metal compound is coordinated with a monocyclopentadienyl ligand to which an amido-quinoline group is introduced, a method for preparing the same, and a method for preparing a polyolefin using the same. The transition metal catalyst compound used in the present invention is configured such that an amido group is linked in a cyclic form via a phenylene bridge. Thus, a pentagon ring structure of the transition metal compound is stably maintained, so that monomers easily approach the transition metal compound and the reactivity is also high. Accordingly, if the supported catalyst for olefin polymerization prepared according to the present invention is applied to the copolymerization of ethylene and monomers having large steric hindrance in a slurry or a gas phase process, a linear, a linear, high molecular weight polyolefin having a very low density of 0.900 to 0.970 g/cc or less can be obtained.

Supported catalyst for olefin polymerization using transition metal compound having phenylene-bridge, method for preparing the same, and method for preparing polyolefin using the same

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Daejeon, South Korea

Jong-Sang Park