Lg Chem, Ltd

Postech Academy-industry Foundation

Won-Hee Kim

Kyung-Seop Noh

Sang-Jin Jeon

Nan-Young Lee

Cheon-Il Park

Sang-Eun An

Choong-Hoon Lee

Bae-Kun Shin

Byoung-Ho Jeon

Ki-Su Ro

Hoon Chae

Eun-Jung Lee

Nam-Jeong Lee

Sung-Hyun Nam

Jong-Joo Ha

Eun-Mi Seo

Yoo-Young Jung

Eun-Kyoung Song

Beom-Seok Kim

Mahn-Joo Kim

Jaiwook Park

Seung-Ki Park

Dong-Man Cho

Kiwon Han

Yoon Kyung Choi

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 a transition metal catalyst composition which can exhibit high reactivity in a polymerization reaction of a polyolefin and can easily control characteristics such as chemical structure, molecular weight distribution, mechanical properties, and the like of a synthesized polyolefin, and a method of preparing a polyolefin using the catalyst composition.

Transition metal catalyst composition including a transition metal compound and a method of preparing a polyolefin using the catalyst composition

The present description relates to an olefin block copolymer having excellences in elasticity, heat resistance, and processability. 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. In the olefin block copolymer, a first derivative of the number Y of short-chain branches (SCBs) per 1,000 carbon atoms of each polymer chain contained in the block copolymer with respect to the molecular weight X of the polymer chains is a negative or positive number of &#x2212;1.5&#xd7;10or greater; and the first derivative is from &#x2212;1.0&#xd7;10to 1.0&#xd7;10in the region corresponding to the median of the molecular weight X or above.

Olefin block copolymer

The present description relates to an olefin block copolymer preferably useful to form nonslip pads due to excellences in elasticity and heat resistance, and a sheet-shaped molded body comprising the olefin block copolymer 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 satisfies a defined relationship when a load of 5 to 10 kg is applied to a sheet-shaped molded body of the block copolymer for 12 hours or longer at a temperature of 60&#xb0; C. or higher, and then removed.

Olefin block copolymer and sheet-shaped molded body

The present invention relates to a novel post metallocene-type ligand compound, to a metal compound containing the ligand compound, to a catalytic composition containing the metal compound, and to a method for preparing same, as well as to a method for preparing olefin polymers using the catalytic composition. The present invention provides a catalyst for preparing special polyolefin-based polymers having excellent activity.

Post metallocene-type transition metal compounds

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 provides an optical film including a copolymer that includes (a) an alkene monomer, (b) an acrylate monomer, and (c) at least one of an unsaturated organic acid monomer and an unsaturated acid anhydride monomer having one or more double bonds, a protective film for a polarizer film, and a polarizer plate and an image display device using the same.

Optical film, protection film polarizer film, polarizer plate fabricated thereform, and display device employing therof

The present invention relates to a catalytic composition for producing a 1-alkene-acrylate copolymer that includes a metal nano catalyst, and a method for producing a 1-alkene-acrylate copolymer. In the catalytic composition for producing a 1-alkene-acrylate copolymer, since the content of the polar comonomer is high, it may be used to produce the 1-alkene-acrylate copolymer that has no crystallinity and is capable of being used as an optical material. The method for producing the 1-alkene-acrylate copolymer may be produced by using a simple process of a mild polymerization condition without a polymerization condition of high temperature and high pressure, and it is easy to control physical properties.

Catalytic composition for producing 1-alkene and acrylates copolymer and method for producing 1-alkene and acrylates copolymer

The present invention relates to a method of preparing optically active amines and chiral amines prepared thereby. The method includes reacting an amine compound, a metal catalyst, a biocatalyst including a lipase, and an acyl donor compound in an organic solvent to obtain a chiral amide compound, and then hydrolyzing the chiral amide compound to obtain a chiral amine.

Method for preparing optically active amines

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Daejeon, South Korea

Won-Hee Kim