Dl Chemical Co., Ltd.

Sung Ho Choi

Byung Keel Sohn

Hee Jun Lee

Da Jung Kim

Su Hyun Park

Jang Woo Lee

Han Na Lim

Chae Gwon Lim

Tae Sun Yeoum

Eun Hui Bae

Sung Woo Kang

Seung Tack Yu

Sah Mun Hong

Young Shin Jo

Byung Soon Chun

An embodiment of the present disclosure relates to a polyolefin polymer including a core portion and a shell portion, wherein the core portion has a density of 0.857 g/cmto 0.910 g/cm, the shell portion has a density of 0.890 g/cmto 0.940 g/cm, and the density of the shell portion is higher than that of the core portion, and a polymerization system and polymerization method of producing the same.

Polyolefin polymer and polyolefin polymerization system and method

The present disclosure relates to a linear low-density polyethylene copolymer and a preparation method thereof. The linear low-density polyethylene copolymer has a long-chain branching (LCB) distribution similar to that of general metallocene polyethylene (mPE) and has good mechanical properties such as processability and toughness. Thus, the linear low-density polyethylene copolymer is useful for molding into shrinkage films, agricultural films, etc.

Polyolefin resin and preparation method thereof

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

A catalyst composition for polymerizing a polyolefin having excellent processability and impact strength, a process for producing a polyolefin and a polyolefin resin thereof are disclosed. The catalyst composition comprises at least one first organometallic compound of following formula 1; at least one second organometallic compound of following formula 2; and aluminoxane. The polyolefin resin satisfies following properties (i) to (iv) and (vi), (i) melt flow index (ASTM D1238), measured at 190&#xb0; C., under a load of 2.16 kg: 0.1 to 1.5 g/10 min, (ii) density: 910 to 930 kg/m, (iii) the ratio (Mw/Mn), as measured by gel permeation chromatography (GPC): 3.0 to 7.0, (iv) the ratio (Mz/Mw), as measured by GPC: 2.2 to 4.5, and (vi) when the TREF curve of multimodal distribution is deconvoluted, the area of TREF curve having a peak at 50 to 74&#xb0; C. is 40 to 75% of the total area of the TREF curve.

Catalyst composition for polymerizing polyolefin, method for producing polyolefin, and polyolefin resin

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Sejong-si, South Korea

Sung Ho Choi