Lg Chem, Ltd

Seungwhan Jung

Choong Hoon Lee

Eun Jung Lee

Bun Yeoul Lee

Boram Lee

Jong Joo Ha

Dae June Joe

Jung A Lee

Beomdoo Seo

Ui Gab Joung

Ki Soo Lee

Eun-Jung Lee

Sangwoo Lee

Choong-Hoon Lee

Ki-Soo Lee

Sung-Don Hong

Bun-Yeoul Lee

Jong-Joo Ha

Jung-A Lee

Young-Chul Won

Jung Bin Lee

Eunjung Lee

Hyosun Lee

Jong-Joo 3-403 Lg Company Housing Apt Ha

Choong-Hoon 8-202 Lg Company Housing Apt Lee

Young-Whan 102-203 Wooseong Apt 383-3 Park

Eunjung 903-1105 Yeolmaemaeul 9Danji Lee

Beomdoo 110-1304 Samsung Hanul Apt Seo

Choong-Hoon c/o Lg Chem Ltd Lee

Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido or alcoxy group is introduced is coordinated, a method of synthesizing the same, and olefin polymerization using the transition metal complex. Compared to a conventional transition metal complex having a silicon bridge and an oxido ligand, the transition metal complex has a phenylene bridge, so that a monomer easily approaches the transition metal complex in terms of structure and a pentagon ring structure of the transition metal complex is stably maintained. The catalyst composition including the transition metal complex is used to synthesize a polyolefin copolymer having a very low density less than 0.910 g/cc.

Transition metal complexes, catalyst compositions containing the same, and olefin polymerization using the catalyst compositions

Provided are a supported metallocene catalyst which has excellent supporting efficiency due to an interaction between a cocatalyst supported on a carrier and a metallocene compound substituted with a functional group that can function as a Lewis base, such as acetal, ketal, tert-alkoxy alkyl, benzyloxy alkyl, substituted benzyloxy alkyl, monothioacetal, or monothioketal, and a method of polymerizing an olefin using the supported metallocene catalyst. In the supported metallocene catalyst, the metallocene catalyst is strongly bound to the carrier due to a Lewis acid-base interaction between the metallocene compound and the cocatalyst, and thus the metallocene catalyst is not separated from the carrier during the polymerization of polyolefin in a slurry or gas phase method. Thus, fouling is prevented and the prepared polymer has a good particle shape and a high apparent density. Thus, the supported metallocene catalyst can be suitably used in a conventional slurry or gas phase polymerization process.

Supported metallocene catalyst, method of preparing the catalyst and method of preparing polyolefin using the catalyst

Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin polymer using the catalyst composition. The transition metal complex has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, a sterically hindered monomer can easily approach the transition metal complex. By using a catalyst composition including the transition metal complex, a linear low density polyolefin copolymer having a high molecular weight and a very low density polyolefin copolymer having a density of 0.910 g/cc or less can be produced in a polymerization of monomers having large steric hindrance. Further, the reactivity for the olefin monomer having large steric hindrance is excellent.

Transition metal complex, catalyst composition including the same and olefin polymer using catalyst composition

Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amine-based group is introduced is coordinated, a method of synthesizing the same, and olefin polymerization using the transition metal complex In the novel transition metal complex, an imino phenyl group is not cross-linked to a metal atom and directly introduced to a cyclopentadiene (Cp) ring. The catalyst composition including the transition metal compound is used to obtain a polyolefin copolymer having a very low density less than 0.910 g/cc.

Provided is catalyst composition including a transition metal complex precatalyst represented by Formula 1; a first cocatalyst represented by Formula 2 which is an alkylaluminum compound; and a second cocatalyst represented by Formula 3 which is a salt compound comprising a Bronsted acid cation and a noncoordinating, compatible anion.  A catalyst composition including binuclear transition metal complexes, an alkylaluminum compound, and a salt compound including a Bronsted acid cation, and a noncoordinating, compatible anion, and a method of preparing the catalyst composition are provided.

Catalyst composition including transition metal complexes and olefin polymerization using the same

Growing community of inventors

Suwon, South Korea

Seungwhan Jung