Lg Chem, Ltd

Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

Sk Gc Americas Inc.

Sk Geo Centric Co., Ltd.

Hae Woong Park

Choong Hoon Lee

Sang Eun Park

Seung Hwan Jung

Young Woo Lee

Hyo Ju Kim

Don Ho Kum

Jin Sam Gong

A Rim Kim

Ji Yoon Woo

Dong Eun Kim

Young Shil Do

Ik Je Choe

In Sung Park

Yoon Hee Cho

Doh Yeon Park

Kyung Bok Bae

Hai Jin Shin

Yong Zheng

A method of preparing an aqueous dispersion of an ethylene-carboxylic acid copolymer according to exemplary embodiments of the present invention includes: mixing 30% by weight or more of an ethylene-(meth)acrylic acid copolymer, a basic compound, and water to form a mixed solution; and adding an inorganic salt compound to the mixed solution. Therefore, the aqueous dispersion of the ethylene-carboxylic acid copolymer may be effectively dispersed.

Aqueous dispersion of ethylene-carboxylic acid copolymer and method of preparing the same

The present invention relates to a polypropylene-based resin composition which exhibits mechanical properties such as excellent strength and more improved impact strength, and a molded article comprising the same. The polypropylene-based resin composition comprises: a polypropylene-based resin; and an olefin-based copolymer, and shows two or more elution temperatures at a predetermined temperature range when analyzing the olefin-based copolymer by temperature rising elution fractionation (TREF).

Polypropylene-based resin composition

The present invention provides an olefin-based polymer which satisfies the following conditions of (1) to (4) and is capable of exhibiting improved impact strength without degrading mechanical properties such as tensile strength: (1) density (d): from 0.850 to 0.910 g/cc, (2) melting index (MI, 190&#xb0; C., 2.16 kg load conditions): from 0.1 to 100 g/10 min, (3) molecular weight distribution (MWD): from 1.5 to 3.0, and (4) 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 (TREF), and 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).

Olefin-based polymer

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 a novel ligand compound, a transition metal compound and a catalyst composition including the transition metal compound. The novel ligand compound and the transition metal compound of the present invention may be usefully used as the catalyst of a polymerization reaction for preparing an olefin polymer having a low density relative to a CGC catalyst. In addition, a product having a low melt index (MI) and a high molecular weight may be manufactured using the olefin polymer polymerized using the catalyst composition including the transition metal compound.

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

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.

The present invention relates to a novel ligand compound, a transition metal compound, and a catalytic composition including the same. The novel ligand compound and the transition metal compound of the present invention are useful as a polymerization reaction catalyst in preparing an olefin-based polymer having low density. In addition, an olefin polymer polymerized using a catalytic composition including the transition metal compound is capable of being prepared to a high molecular weight product having a low melt index (MI).

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

This disclosure relates to a catalyst composition that can prepare polyolefin having high molecular weight, a method for preparing the same, and a method for preparing polyolefin using the same. The dinuclear metallocene compound included in the catalyst composition according to the present invention is a dinuclear metallocene compound with a new structure, and, unlike a single-site catalyst, has high accessibility to a substrate, and thus, can provide a multi-site catalyst with high activity.

Catalyst composition, a method for preparing the same, and a method for preparing polyolefin using the same

The present invention relates to a polyolefin having a molecular weight distribution of 1.5 to 3.0 and having a branch gradient number (BGN) of 0.01 to 1.0. According to the present invention, there is provided the polyolefin having a narrow molecular weight distribution and showing a unique comonomer distribution to have excellent impact strength and mechanical physical properties.

Polyolefin

The present invention relates to a method of preparing an olefin-based polymer including a step of polymerizing an olefin monomer in the presence of a catalyst composition including a cis isomer and a trans isomer. According to the method of preparing an olefin-based polymer according to an embodiment of the present invention, similar level of density and molecular weight may be exhibited with a relatively smaller amount of octene when compared to that of a common polymer. Thus, a stable olefin-based polymer having good copolymerization properties may be prepared.

Method of preparing olefin-based polymer and olefin-based polymer prepared thereby

The present invention relates to an olefin-based polymer including an elution temperature 1 (Te1) and an elution temperature 2 (Te2), which are elution temperatures of the olefin-based polymer in a temperature range from &#x2212;20&#xb0; C. to 130&#xb0; C. when measuring temperature rising elution fractionation (TREF) and having branch gradient number (BGN) from &#x2212;1.0 to &#x2212;0.001 when measuring chromatography Fourier transform infrared spectroscopy (GPC FT-IR).

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Daejeon, South Korea

Hae Woong Park