Lg Chem, Ltd

Sk Innovation Co., Ltd.

Ajou University Industry-academic Cooperation Foundation

Lotte Chemical Corporation

S-precious Catalysts Inc.

Kolon Industries, Inc.

Bun Yeoul Lee

Ki Soo Lee

Choong Hoon Lee

Eun Ji Shin

Seok Pil Sa

Jong Yeob Jeon

Seungwhan Jung

Eun Jung Lee

Sujith Sudevan

Hyun Mo Lee

Yoon Ki Hong

Anish Cyriac

Jong Joo Ha

Jung Jae Lee

Sung Jae Na

Jae Ki Min

Beomdoo Seo

Eun Kyung Noh

Boram Lee

Myung Ahn Ok

Dae June Joe

Kwang Jin Chung

Young Whan Park

Young Chul Won

Yong Gyu Han

Ji Hae Park

S Sujith

Ji Su Jeong

Jun Won Baek

Sung Dong Kim

Ui Gab Joung

Myungahn Ok

Jisu Jeong

Kwangjin Chung

Sung Don Hong

SungJae Na

Dong Sik Park

Jung A Lee

Hyun Ju Lee

Hyosun Lee

Tae Hee Kim

Woon Sung Hwang

Eun Yeong Hwang

Su Jin Gwon

Eun Seok Park

Tae Jin Kim

Eun-Jung Lee

Heon Yong Kwon

Seul Ki Im

Dae Woo Nam

Jung Hoon Seo

Eun Ho Kim

Yonggyu Han

Hyo Sun Lee

Kwang Ho Song

Sujith S

Jung Bin Lee

Geun Ho Park

Seung Whan Jung

SangHwan Lee

Eunjung Lee

Boong Goon Jeong

Jong Un Sung

Kodiyan Varghese Jobi

Seung Soo Park

Hee Soo Park

Chung Sol Kim

Ik Kyung Sung

Seung Taek Yu

Young Eun Jang

Seong Chan Eo

Hye Young Jung

Soo Yeon Lee

Woon Jin Park

Sung Rak Joo

YoungGyu Han

Kyung Lee Park

Sang Hwan Lee

The present invention relates to an anionic polymerization initiator represented by Formula 1 below for producing a polyolefin-polystyrene block copolymer, an anionic polymerization initiator composition, and a production method therefor,

Anionic polymerization initiator, anionic polymerization initiator composition, and production method therefor

The present invention relates to a method for preparing a cocatalyst compound using an anhydrous hydrocarbon solvent, and a cocatalyst compound prepared thereby.

Method for preparing cocatalyst compound using anhydrous hydrocarbon solvent

A ligand compound having a novel structure, a transition metal compound including the same, a catalyst composition including the transition metal compound, and a method of preparing an olefin polymer using the catalyst composition are disclosed herein. In some embodiments, the transition metal compound is represented by Formula 1. In some embodiments, the ligand compound is represented by Formula 2.

Ligand compound, transition metal compound, and catalyst composition including the same

The present invention relates to a method for preparing a polyolefin block copolymer, the method comprising: a first step of coordination polymerization of an olefin monomer with a transition metal catalyst in the presence of organozinc; and a second step of continuously adding a diacyl peroxide compound to perform polymerization, and to a polyolefin block copolymer prepared therefrom.

Symmetrical polyolefin block copolymer and preparation method therefor

A method for producing a block copolymer composition including a diblock copolymer and a triblock copolymer each containing a polyolefin-based block and a polystyrene-based block is disclosed herein. In some embodiments, the method includes reacting an organic zinc compound with one or more kinds of olefin-based monomers in the presence of a transition metal catalyst to form an intermediate having an olefin-based polymer block, reacting the intermediate styrene-based monomer in the presence of an alkyllithium compound to form a product having a styrene-based polymer block, and reacting the product with water, oxygen, or an organic acid to form a block copolymer wherein the number of moles of the alkyllithium compound used to form the product is larger than the number of moles of the organic zinc compound used to form the intermediate.

Method for producing block copolymer composition

A block copolymer composition is disclosed herein. In some embodiments, a block copolymer composition has a weight average molecular weight (M) of 70,000 g/mol to 120,000 g/mol, a polydispersity index (PDI) of 1.0 to 2.0, a glass transition temperature (T) of &#x2212;55&#xb0; C. to &#x2212;30&#xb0; C., and a melt index (MI), measured at 230&#xb0; C. and a loading condition of 5 kg, of 0.2 g/10 minutes to 3.0 g/10 minutes. The block copolymer composition has excellent processability.

Block copolymer composition

A block copolymer composition is disclosed herein. In some embodiments, the block copolymer composition includes a diblock copolymer and a triblock copolymer each including a polyolefin-based block and a polystyrene-based block. The diblock copolymer is present at less than or equal to 19% , based on total weight of the block copolymer composition, the polyolefin-based block includes a repeating unit represented by Formula 1, and the polystyrene-based block includes one or more of Formulas 2 and 3:  wherein Ris hydrogen, C3 to C20 alkyl, or C3 to C20 alkyl substituted with silyl, Rand Rare each independently C6 to C20 aryl, or C6 to C20 aryl substituted with halogen, C1 to C12 alkyl, or C3 to C12 cycloalkyl, n is an integer from 1 to 10,000, and l and m are each independently an integer from 10 to 1,000.

A block copolymer composition is disclosed herein. In some embodiments, a block copolymer composition includes a diblock copolymer and a triblock copolymer, each including a polyolefin-based block and a polystyrene-based block, wherein the polyolefin-based blocks are present between 45 wt % to 90 wt %, wherein the polystyrene-based blocks are present between 10 wt % to 55 wt %, wherein the difference (&#x394;T) between a thermal decomposition initiation temperature and a thermal decomposition termination temperature (&#x394;T) measured by Thermo-Gravimetric Analysis (TGA) is 55&#xb0; C. or greater, and the diblock copolymer and the triblock copolymer do not have a residual unsaturated bond.

The present invention relates to a polyolefin-polystyrene multi-block copolymer having a structure comprising a polyolefin block and polystyrene blocks bonded to both ends of the polyolefin block, to an organozinc compound for preparing the same, and a method for preparing the polyolefin-polystyrene multi-block copolymer.

Polyolefin-polystyrene multi-block copolymer, organozinc compound for preparing same, and method for preparing polyolefin-polystyrene multi-block copolymer

The present invention relates to a bisphosphine ligand compound, a chromium compound prepared using same, an ethylene oligomerization catalyst system containing the chromium compound, and an ethylene oligomer preparing method, wherein the bisphosphine ligand compound is suitable for mass production and commercial processes, allows extremely high activity to be compatible with excellent economical benefit, and increases selectivity for ethylene oligomerization reaction, thereby being able to be used to manufacture 1-hexene and/or 1-octene at high yield.

Bisphosphine ligand compound, chromium compound, ethylene oligomerization catalyst system, and ethylene oligomer preparation method

The present invention relates to a chrome compound composed of non-coordinating anions and a trivalent chrome cation, a reactant of the chrome compound and a bidentate ligand, an ethylene oligomerization reaction catalyst system using the chrome compound and the reactant, and a method for preparing an ethylene oligomer using the catalyst system. Through the above conformation, the present invention can selectively produce 1-hexene and 1-octene with high activity while omitting the use of methylaluminoxane (MAO), and can provide an ethylene oligomerization process more suitable for mass production.

Chrome compound, catalyst system using same, and method for preparing ethylene oligomer

Disclosed herein are a chromium compound represented by Formula 1a or 1c and a catalyst system including the same, exhibiting superior catalytic activity in an olefin trimerization reaction:[{CH(CH)CH(CHCH)CO}Cr(OH)]&#x2003;&#x2003;[Formula 1a][{CH(CH)CH(CHCH)CO}Cr(OH)].2HO.&#x2003;&#x2003;[Formula 1c]

Chromium compound, catalyst system including the same, and method for trimerizing ethylene using the catalyst system

Provided is an aliphatic polycarbonate macropolyol including &#x2014;OAO&#x2014; and Z(O&#x2014;)as repeating units. In the aliphatic polycarbonate macropolyol, the repeating units &#x2014;OAO&#x2014; and Z(O&#x2014;)are linked to each other via carbonyl (&#x2014;C(O)&#x2014;) linkers or are bonded to hydrogen to form terminal &#x2014;OH groups. The number of moles of the terminal &#x2014;OH groups is from aZ to aZ+0.2Z (where Z represents the number of moles of the repeating unit Z(O&#x2014;)). Further provided is an aliphatic polycarbonate-co-aromatic polyester macropolyol including &#x2014;OAO&#x2014; and Z(O&#x2014;)as repeating units. In the aliphatic polycarbonate-co-aromatic polyester macropolyol, the repeating units &#x2014;OAO&#x2014; and Z(O&#x2014;)are linked via carbonyl (&#x2014;C(O)&#x2014;) and &#x2014;C(O)YC(O)&#x2014; as linkers or are bonded to hydrogen to form terminal &#x2014;OH groups.

Aliphatic polycarbonate macropolyol and aliphatic polycarbonate-coaromatic polyester macropolyol

The present invention relates to an organic zinc compound comprising a styrene-based polymer or a polyolefin-polystyrene block copolymer at both ends. Also, the present invention relates to a method for preparing the organic zinc compound, the method preparing an intermediate by coordination-polymerizing an olefin monomer using a transition metal catalyst, and then performing anionic polymerization by inserting an alkyllithium compound, an amine ligand, and a styrene-based monomer into the intermediate. Accordingly, the present invention can provide a method for preparing a commercially useful styrene-based polymer or polyolefin-polystyrene block copolymer directly from an olefin monomer and a styrene monomer in a one-pot manner.

Organic zinc compound comprising polyolefin-polystyrene block copolymer, and method for preparing the same

Disclosed herein are a chromium compound represented by Formula 1a or 1b and a catalyst system including the same, exhibiting superior catalytic activity in an olefin trimerization reaction:[{CH(CH)CH(CHCH)CO}Cr(OH)]&#x2003;&#x2003;[Formula 1a][{CHCHCH(CHCH)CO}Cr(OH)].&#x2003;&#x2003;[Formula 1b]

Chromium compound, catalyst system including same, and method for trimerizing ethylene using the catalyst system

Growing community of inventors

Suwon-si, South Korea

Bun Yeoul Lee