Lg Chem, Ltd

Kepco Engineering & Construction Company, Inc.

Korea Institute of Machinery & Materials

Sung Ho Park

Ki Soo Lee

Sung Min Lee

Heon Yong Kwon

Soo Young Choi

Jin Young Lee

Dae Sik Hong

Jeong Heon Ahn

Seul Ki Im

Hyun Jee Kwon

Jinyoung Lee

Hyo Jin Bae

Sol Cho

Seyoung Kim

Oh Joo Kwon

Jeongkyu Lee

Yong Ho Lee

Jin Young Park

Dae Hwan Kim

Jun Seok Ko

Se Young Kim

Suk Youn Kang

Kyung Jin Cho

Sung Cheol Yoon

Daesik Hong

Eun Young Shin

Min Seok Cho

Sun Keun Kim

Hyojoon Lee

Ji Eun Kim

Bog Ki Hong

Sang Eun Park

Sung Hyun Park

Kyoung Hwan Oh

Jong Min Kim

Chang Woan Han

Young Suk You

Suk Joon Yoo

Su Hwa Kim

Chang Hwan Jang

Jisoo Song

Kyu Wan Kim

Eun Ji Shin

Sang Min Lee

Myung Han Lee

Sung Joon Oh

Dong Hui Kim

Seok Hwan Kim

Seung Mi Lee

Seungmi Lee

Eunji Shin

Youngsuk You

Seung Ki Park

Young Duk Lee

Sang Gyu Kang

Ohjoo Kwon

Han Ho Song

Seung Jin Song

Kook Young Ahn

Ju Hyeong Cho

Han Seok Kim

Min Kuk Kim

Ilhak Bae

The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cmto 0.930 g/cmmeasured according to ASTM D1505; and has an ethylene sequence inhomogeneity (I) calculated by the following Equation 1 of 1.25 to 1.40, when analyzed by SSA (Successive Self-nucleation and Annealing):Inhomogeneity ()=  [Equation 1]

Polyolefin

This invention relates to polyolefin. More specifically, this invention relates to polyolefin that has small copolymer content, but exhibits excellent mechanical properties.

The present invention relates to polyolefin. More specifically, the present invention relate s to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency and satisfying one of the following 1)˜4):

The present disclosure provides an olefin polymer having excellent film processability and physical properties, and a preparation method of the same.

Olefin polymer and preparation method thereof

The present invention relates to polyolefin. More specifically, the present invention relates to polyolefin having excellent dart drop impact strength, and exhibiting improved transparency, and such polyolefin has a density of 0.915 g/cm3 to 0.930 g/cm3 measured according to ASTM D1505; and satisfies the following requirements (provided that S1+S2+S3=1), when measuring the relative content of peak area according to melting temperature (Tm) using SSA (Successive Self-nucleation and Annealing) analysis: the content(S1) of peak area at Tm less than 100&#xb0; C. is 0.33 to 0.35; the content(S2) of peak area at Tm of 100&#xb0; C. or more and 120&#xb0; C. or less is 0.52 to 0.56; and the content(S3) of peak area at Tm greater than 120&#xb0; C. is 0.10 to 0.14.

A conjugated diene-based polymer catalyzed with a lanthanide rare earth element, and having high linearity and improved compounding properties, and a method for preparing the same are provided. The conjugated diene-based polymer catalyzed with a lanthanide rare earth element has high linearity, and if applied to a rubber composition, may show excellent processability, tensile strength and viscoelasticity.

Conjugated diene-based polymer and method for preparing the same

The present invention relates to a method of preparing a conjugated diene-based polymer by continuous polymerization using two or more reactors, and relates to a method of preparing a conjugated diene-based polymer which is capable of providing a conjugated diene-based polymer having improved Mooney viscosity and excellent cis 1,4 bond content and linearity, by controlling the injection amount of a conjugated diene-based monomer to each reactor in a specific ratio and resolving the deterioration phenomenon of physical properties, which might be generated in continuous reaction.

Method of preparing conjugated diene-based polymer by continuous polymerization

The present invention provides a hybrid supported catalyst capable of easily preparing an olefin polymer capable of having improved melt strength even while having appropriate molecular weight distribution, and thus having improved bubble stability and exhibiting excellent blown film processability, and a method for preparing an olefin polymer using the same.

Hybrid supported catalyst

A method of preparing a conjugated diene-based polymer by continuous polymerization using two or more reactors is provided. The method of preparing a conjugated diene-based polymer includes a conjugated diene-based polymer having excellent cis 1,4 bond content and linearity, by adjusting the ratio of a polymer and a monomer in each reactor and by adjusting the retention time in a second reactor and resolving the deterioration phenomenon of physical properties, while improving productivity by reducing the contamination of the reactors.

An olefin polymer capable of simultaneously satisfying excellent drop impact strength and transparency, a preparation method of the same, and a film using the same, can be provided. In an embodiment, an olefin polymer comprises a plurality of polymer chains, and satisfies the following conditions: i) each polymer chain of the plurality having an average number of short chain branches (SCBs) per 1000 carbon atoms of 20/1000C or more, wherein an SCB has C2 to C7 carbon atoms, ii) a molded film of the olefin polymer having a drop impact strength of 1500 g to 2400 g as measured in accordance with ASTM D1709A, wherein the molded film having a thickness of 100 &#x3bc;m, and iii) a molded film of the olefin polymer having a haze is 10% to 30% as measured in accordance with ASTM D1003, wherein the molded film having a thickness of 0.05 mm.

Olefin polymer, preparation method of the same, and film using the same

The present disclosure provides a supported hybrid catalyst which facilitates the preparation of polyolefins having improved bubble stability and exhibiting excellent processability for a blown film while maintaining high transparent haze and improved melt strength, and a method for preparing the same.

Supported hybrid catalyst

The present invention provides a catalyst composition including a functionalizing agent of the following Formula 1 together with a rare earth metal compound, an alkylating agent, and a halogen compound, having good catalytic activity and polymerization reactivity and useful for the preparation of a conjugated diene-based polymer having high linearity and excellent processability, and a conjugated diene-based polymer prepared using the catalyst composition.(X)&#x2014;N&#x2014;(X)&#x2003;&#x2003;[Formula 1] In Formula 1, a, X, and Xare the same as defined in the disclosure.

Catalyst composition for preparing conjugated diene-based polymer and conjugated diene-based polymer preparing using the same

The present invention relates to a modifier represented by Formula 1, a modified conjugated diene-based polymer having a high modification ratio which includes a modifier-derived functional group, and a method of preparing the polymer.

Modifier and modified conjugated diene-based polymer including functional group derived therefrom

The present invention provides an olefin polymer in which LCB (long chain branch) is introduced into mLLDPE (metallocene linear low-density polyethylene) to control the storage modulus, whereby the olefin polymer has excellent bubble stability and processing load characteristics and exhibits excellent processability during preparation of a film, and further has excellent mechanical properties and transparency.

Olefin polymer and method for preparing same

The present invention relates to a supported hybrid catalyst and a method for preparing olefin polymer using the same. Using the supported hybrid catalyst, olefin polymer that maintains excellent mechanical strength of olefin polymer polymerized with the existing metallocene catalyst, but exhibits remarkably improved processibility compared to the existing olefin polymer, can be provided.

Supported hybrid catalyst and method for preparing olefin polymer using the same

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Daejeon, South Korea

Sung Ho Park