Lg Chem, Ltd

Choong-Hoon Lee

Eun-Jung Lee

Sangwoo Lee

Jong-Joo Ha

Seung-Whan Jung

Don-Ho Kum

Jung-A Lee

Dong-Kyu Park

Byung-Kwon Lim

Bo-Ram Lee

Bun-Yeoul Lee

Ki-Su Ro

Cheon-Il Park

Kyung-Seop Noh

Won-Hee Kim

Sang-Jin Jeon

Hyo-Sun Lee

Yang-Kee Kim

Jong-Chan Lee

Ki-Soo Lee

Boong-Goon Jeong

Sung-Don Hong

Dae-Woo Nam

Nan-Young Lee

Young-Whan Park

Sang-Eun An

Kwang-Ho Song

Kyung-Seok Min

Si-Geun Lee

Bun-Yeol Lee

Beom-Doo Seo

Seong-Jin Kim

Jae-Seung Oh

Heon-Yong Kwon

Dae-Sik Hong

Sung-Soo Park

Seon-Kyoung Kim

Seungwhan Jung

Hoon Chae

Jong-Sang Park

Yong-Gyu Han

Joon-Hee Cho

Soojeong Lee

Sang-Woo Lee

Sang-Young Shin

Eun-jung Lee

Jeong-Yon Jeong

Sun-Young Park

Eunjung 903-1105 Yeolmaemaeul 9Danji Lee

Seungwoo 202-1011 Yuwon Jeil 2Cha Apt Choi

Churlyoung 8-505 Lg Company Housing Apt Park

Hoon 117-617 Hakyeoul Cheonggu Apt Chae

Soojeong 109-1201 Lucky Hana Apt Lee

Yiyoung Choi

Sang-Woo c/o Lg ChemLtd Lee

The present description relates to an olefin block copolymer having excellences in elasticity and heat resistance and its preparation method. The olefin block copolymer includes a plurality of blocks or segments, each of which includes an ethylene or propylene repeating unit and an &#x3b1;-olefin repeating unit at different weight fractions. The olefin block copolymer has a density of 0.85 to 0.92 g/cm, and density X (g/cm) and TMA (Thermal Mechanical Analysis) value Y (&#xb0; C.) satisfy a defined relationship.

Olefin block copolymer and preparation method thereof

The present invention relates to an olefin-based polymer which exhibits superior processability and superior adhesive properties and therefore is desirably applicable to a hot-melt adhesive (HMA) or the like, and a preparation method thereof. The olefin-based polymer has a molecular weight distribution (Mw/Mn, PDI) of 2&#x2dc;3, and a density of 0.85 to 0.88 g/cm, and satisfies the relation of Tc&#x2212;Tm&#x3e;0, wherein Tc (&#xb0; C.) is a crystallization temperature and Tm (&#xb0; C.) is a melting point.

Olefin-based polymer and preparation method thereof

The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature.

Method for producing an elastomer using a transition metal catalyst

The present invention provides a novel transition metal complex where a monocy-clopentadienyl ligand to which an amido group is introduced is coordinated, a method for synthesizing the complex, and olefin polymerization using the same. The method for preparing a transition metal complex according to the present invention comprises a step of blocking a by-reaction of a nitrogen atom using a compound containing a protecting group, and thus it is possible to prepare a transition metal complex in a simpler manner in a high yield. Further, the transition metal complex according to the present invention 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, sterically monomers can easily approach the transition metal complex.

Method for preparing transition metal complexes, transition metal complexes prepared using the method, catalyst composition containing the complexes

The present invention provides a polypropylene-based resin composition, which comprises of a) a polypropylene; b) an ethylene 1-octene copolymer in which rr&#x3c;1 (herein, r=k/k, r=k/k, kis a growth reaction rate constant when ethylene is added to a growth chain in which an end active site is ethylene, kis a growth reaction rate constant when octene is added to a growth chain in which an end active site is ethylene, kis a growth reaction rate constant when octene is added to a growth chain in which an end active site is octene, and kis a growth reaction rate constant when ethylene is added to a growth chain in which an end active site is octene); and c) an inorganic filling agent, and a part for vehicles manufactured by using the same.

Polypropylene-based resin composition and automobile parts using the same

The present invention relates to a preparation method of olefin polymers using a catalyst composition containing a transition metal compound. In detail, the present invention provides a preparation method of olefin polymer using a catalyst composition comprising a transition metal compound, wherein the preparation method comprises introducing a scavenger to a continuous solution polymerization reactor in a specific range of amount to give the olefin polymer with good productivity.

Process for preparation of olefin polymers

The present invention relates to an ethylene-alpha olefin copolymer comprising long chain branches (LCB), while having a narrow molecular weight distribution. The ethylene-alpha olefin copolymer can be prepared by a continuous solution polymerization process using an activated catalyst composition containing a Group 4 transition metal compound having a monocyclopentadienyl ligand, to which a quinoline amino group is introduced.

Long chain-branched ethylene-alpha olefin copolymer

The present invention relates to an ethylene &#x3b1;-olefin copolymer having a narrower molecular weight distribution, and a uniform distribution of comonomer. The ethylene &#x3b1;-olefin copolymer according to the present invention has a uniform comonomer distribution and exhibits a lower density in the same comonomer content, unlike conventional ethylene copolymers having a random or blocky comonomer distribution.

Ethylene &#x3b1;-olefin copolymer

The present invention relates to a catalyst composition and a process for preparing an olefin polymer using the same. More specifically, the present invention relates to a novel catalyst composition comprising at least two types of catalysts and a process for preparing an olefin polymer having excellent heat resistance using the same. The present invention can provide an olefin polymer having excellent activity and high heat resistance, and also can control the values of density, heat resistance and melt index (MI) of the olefin polymer.

Catalyst composition and process for preparing olefin polymer using the same

The present invention relates to a mixed metallocene catalyst composition including a first metallocene catalyst and a second metallocene catalyst, and a method for preparing a polyolefin using the catalyst composition. According to the catalyst composition and the preparation method, provided is a polyolefin having a wide molecular weight distribution and superior mechanical properties and processability.

Mixed metallocene catalyst composition and method for preparing polyolefin using the same

Growing community of inventors

Daejeon, South Korea

Choong-Hoon Lee