Daelim Industrial Co., Ltd.

Dl Chemical Co., Ltd.

Sah Mun Hong

Jae Hoon Uhm

Jin Hun Ju

Hee Sun Bae

Joo Mi Yeo

Byung Keel Sohn

Sung Woo Kang

Jang Woo Lee

Da Jung Kim

Su Hyun Park

Sung Ho Choi

Hee Jun Lee

Young Jae Jun

Tae Soo Hwang

Byoung Keel Sohn

Hyun Ki Youn

Disclosed are a polyolefin resin composition and a production method using same. The polyolefin resin satisfies the following conditions: (1) melt index (MI2.16, 190&#xb0; C., under a load of 2.16 kg) is 0.1 to 1.5 g/10 min; (2) density is 0.91 to 0.93 g/cc; (3) polydispersity Index (Mw (weight-average molecular weight)/Mn (number-average molecular weight)) is 3 to 7; (4) Mz (Z-average molecular weight)/Mw (weight-average molecular weight) is 2.3 to 4.5; and (5) COI(Comonomer Orthogonal Index) value calculated by Equation 1 in the specification is 5 to 12. In Equation 1, 'SCB number at Mz' represents average number of branches derived from comonomers per 1000 carbon atoms at Z-average molecular weight (Mz), and 'SCB number at Mn' represents average number of branches derived from comonomers per 1000 carbon atoms at number-average molecular weight (Mn) based on a molecular weight-comonomer distribution graph.

Polyolefin resin composition and production method of same

Disclosed is a method for polymerization that copolymerizes ethylene and alpha-olefin. The method includes the steps of: copolymerizing ethylene and alpha-olefin of reaction raw materials in presence of solvents, to produce a polymerization product in which low molecular weight compounds containing unreacted ethylene and alpha-olefin, the solvents, ethylene and alpha-olefin copolymers and ethylene and alpha-olefin oligomers; separating the unreacted ethylene and alpha-olefin contained in the polymerization product by distilling; separating the solvents and the low molecular weight compounds having lower molecular weight than the ethylene and alpha-olefin copolymer and contained in the polymerization product by distilling, to obtain pure polymerization product; and separating the low molecular weight oligomers from the solvents and the low molecular weight compounds previously separated by distilling to recover the solvents, and then reusing the recovered solvents as solvents for polymerization.

Ethylene and alpha-olefin polymerization method

An apparatus and method for economically copolymerizing ethylene and alpha-olefin by reusing reacting raw materials and solvents, comprising: a polymerization reactor where ethylene and alpha-olefin are supplied as reaction raw materials with a solvent, and the reaction raw materials are copolymerized in a solution state to produce a polymerization product comprising a dissolved ethylene and alpha-olefin copolymer; a unit for separating unreacted ethylene, alpha-olefin, low molecular weight oligomer and a polymer, including a flash tower for distilling and separating the unreacted ethylene and alpha-olefin from the polymerization product, and a stripper unit for distilling and separating the solvent and the low molecular weight oligomer having a molecular weight lower than the molecular weight of the ethylene and alpha-olefin copolymer in the polymerization product; and a solvent recovery unit for separating the low molecular weight oligomer from the separated low molecular weight oligomer and solvent to recover the solvent.

Ethylene and alpha-olefin polymerization apparatus and preparation method

There are disclosed new metallocene compounds and catalysts for olefin polymerization. The metallocene compound is a complex of transition metal and cyclopentadienyl-type ligands substituted with silacycloalkyl group. The metallocene catalyst comprises the above metallocene compound and at least one activator such as aluminoxanes, aromatic boron compounds substituted with fluoride, and modified clays. The metallocene catalyst can be used for polymerization of olefin in liquid phase, slurry phase or gas phase process.

Metallocene compounds, metallocene catalysts including the compounds and methods of polymerizing olefins with the catalysts

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Daejeon, South Korea

Sah Mun Hong