Lg Chem, Ltd

Ik Je Choe

Choong Hoon Lee

Eun Jung Lee

Seul Ki Kim

In Sung Park

Sang Eun Park

Young Woo Lee

Hae Woong Park

Hyo Jung Han

Hyo Ju Kim

Ji Yoon Woo

Young Hoon Na

Ki Won Han

The present invention relates to a catalyst composition including a transition metal compound represented by the following Formula 1; and one or more of a compound represented by the following Formula 2, a compound represented by the following Formula 3 and a compound represented by the following Formula 4. The catalyst composition according to the present invention has excellent copolymerization properties, and can be usefully used as a catalyst for a polymerization reaction for preparing an olefin-based polymer having a high molecular weight.

Catalyst composition including novel transition metal compound

The present invention relates to a novel ligand compound represented by Formula 1 and a novel transition metal compound represented by Formula 2, and the novel ligand compound and transition metal compound according to the present invention has high comonomer incorporation effect in the preparation of an olefinic polymer having a low density and a high molecular weight, and thus can be usefully used as a catalyst for a polymerization reaction.

Compound and transition metal compound

Ligand compound and transition metal compound

The present invention provides a polypropylene-based composite material capable of exhibiting excellent strength properties and impact strength properties, particularly, markedly improved impact strength properties at a low temperature without using a separate additive by including (A) polypropylene, and (B) an olefin-based polymer which satisfies the conditions of the following (b1) to (b4): (b1) density (d): from 0.850 to 0.910 g/cc, (b2) melt index (MI, 190&#xb0; C., 2.16 kg load conditions): from 0.1 g/10 min to 100 g/10 min, (b3) molecular weight distribution (MWD): from 1.5 to 3.0, and (b4) i) two peaks are shown in a temperature range of &#x2212;20&#xb0; C. to 120&#xb0; C. when taking measurements of temperature rising elution fractionation, and ii) a relation of T(90)&#x2212;T(50)&#x2265;60&#xb0; C. is satisfied (where T(90) is a temperature at which 90 wt % of the olefin-based polymer is eluted, and T(50) is a temperature at which 50 wt % of the olefin-based polymer is eluted).

Polypropylene-based composite material

The present invention relates to an olefin-based polymer exhibiting a single peak when analyzed by gel permeation chromatography (GPC), and having three elution temperatures Te1, Te2 and Te3 when measuring temperature rising elution fractionation (TREF) at a temperature ranging from &#x2212;20&#xb0; C. to 120&#xb0; C. Accordingly, the olefin-based polymer having excellent mechanical strength, and in particular, significantly improved impact strength is provided.

Olefin-based polymer

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Daejeon, South Korea

Ik Je Choe