Lg Chem, Ltd

Seul Ki Im

Seung Min Lee

Ki Soo Lee

Eun Ji Shin

Seok Pil Sa

Yong Ho Lee

Jin Young Park

Yoon Ki Hong

Sung Ho Park

Jinyoung Lee

Sung Min Lee

Ji Hyun Park

Seyoung Kim

Hyun Mo Lee

Hyojoon Lee

Yun Kon Kim

Daesik Hong

Jeongkyu Lee

Chang Hwan Jang

Myung Han Lee

Sung Hyun Park

Sol Cho

Seung Mi Lee

Jisoo Song

Seung Jung Yu

Yi Young Choi

Jin Young Lee

Bun Yeoul Lee

Heon Yong Kwon

Mi Kyung Kim

Sung Joon Oh

Dae Woong Lee

Hyun Jee Kwon

Tae Hee Kim

Seok Hwan Kim

Dong Min Kim

Oh Joo Kwon

Seungmi Lee

Hyun Ju Lee

Jun Won Baek

Eunji Shin

Youngsuk You

Ohjoo Kwon

Kyung Lee Park

The present invention relates to a method for preparing a polyolefin-polystyrene-based multiblock copolymer having a uniform structure and showing excellent physical properties through continuous type coordination polymerization and batch type anionic polymerization.

Method for preparing polyolefin-polystyrene-based multiblock copolymer

The present invention relates to a thermoplastic resin composition including a polyolefin-polystyrene-based multi-block copolymer having a structure in which a polystyrene chain is attached to both ends of a polypropylene and polyolefin chain, and the thermoplastic resin composition according to the present invention exhibits high fluidity properties as well as soft feel and high restoring force.

Thermoplastic resin composition

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

A ligand compound having a novel structure, a transition metal compound including the same, a catalyst composition including the transition metal compound, and a method of preparing an olefin polymer using the catalyst composition are disclosed herein. In some embodiments, the transition metal compound is represented by Formula 1. In some embodiments, the ligand compound is represented by Formula 2.

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

A polyolefin-polystyrene multi-block copolymer and a method of producing the same is disclosed herein. In some embodiments, the polyolefin-polystyrene multi-block copolymer has a first complex viscosity of 40,000 Pa·s to 350,000 Pa·s at a temperature of 160° C. and a first frequency of 0.5 rad/s, and has a second complex viscosity of 900 Pa·s to 3,500 Pa·s at a temperature of 160° C. and a second frequency of 125 rad/s. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.

Polyolefin-polystyrene multi-block copolymer and method for producing same

A polyolefin-polystyrene multi-block copolymer and method of making the same is disclosed herein. In some embodiments, a polyolefin-polystyrene multi-block copolymer having a ratio of a loss modulus (E″) to a storage modulus (E') satisfying the following conditions (a) and (b) over a temperature range of −80° C. to 40° C., wherein the ratio is represented by a loss tangent (tan δ) value and is obtained by dynamic mechanical analysis (DMA), (a) a maximum of the tan δ value in a peak present in the temperature range is 0.20 to 0.35, and (b) a half-width of the peak ranges from 32.0° C. to 50.0° C. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.

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 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.

Provided is a polyethylene resin film exhibiting more improved transparency while exhibiting excellent processability and mechanical properties. The polyethylene resin film having a density of 0.910 g/cmto 0.930 g/cm, and a haze of 10% or less at a thickness of 90 &#x3bc;m to 110 &#x3bc;m includes a first polyethylene resin and a second polyethylene resin at a weight ratio of 6:4 to 8:2, wherein the first polyethylene resin has an MFRR (21.6/2.16) value of 27 to 40, and the second polyethylene resin has an MFRR (21.6/2.16) value of 15 to 23, and the MFRR (21.6/2.16) value is obtained by dividing a melt flow rate (MFR) measured at a temperature of 230&#xb0; C. under a load of 21.6 kg in accordance with ISO 1133 by a melt flow rate (MFR) measured at a temperature of 230&#xb0; C. under a load of 2.16 kg in accordance with ISO 1133.

Polyethylene resin film

The present invention relates to a ligand compound, a catalyst system for olefin oligomerization and a method for oligomerizing an olefin using same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.

Ligand compound, organic chromium compound, catalyst system for olefin oligomerizatin, and method for oligomerizing olefin using same

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 invention relates to a method for preparing an oligomerization catalyst system and the method comprises preparing a catalyst composition by mixing a PNP-based ligand compound and a transition metal compound, and mixing and activating a co-catalyst and the catalyst composition at a temperature from &#x2212;40 to 80&#xb0; C. The oligomerization catalyst system prepared by the method may maintain the activity thereof during an oligomerization reaction at a high temperature, and the reaction temperature of oligomerization may be easily controlled. Various merits in processing may be obtained.

Method for preparing oligomerization catalyst system and oligomerization catalyst system prepared thereby

Ligand compound, organic chromium compound, catalyst system for olefin oligomerization, and method for oligomerizing olefin using same

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

A method for olefin oligomerization comprising i) injecting an olefin monomer and a solvent into a continuous stirred tank reactor; ii) injecting an oligomerization catalyst system comprising a ligand compound, a transition metal compound, and a co-catalyst into the continuous stirred tank reactor; and iii) performing a multimerization reaction of the olefin monomer, wherein a ratio of the flowing rates of the olefin monomer and the solvent is from 1:1 to 2:1.

Method for olefin oligomerization

Growing community of inventors

Daejeon, South Korea

Seul Ki Im