Lg Chem, Ltd

Yoon Ki Hong

Ki Soo Lee

Eun Ji Shin

Seok Pil Sa

Yong Ho Lee

Jin Young Park

Seul Ki Im

Bun Yeoul Lee

Hyun Mo Lee

Dae Sik Hong

Eun Kyoung Song

Eun Young Shin

Young Suk You

Joong Soo Kim

Hyuck Ju Kwon

Ye Jin Lee

A method for producing a block copolymer composition including a diblock copolymer and a triblock copolymer each containing a polyolefin-based block and a polystyrene-based block is disclosed herein. In some embodiments, the method includes reacting an organic zinc compound with one or more kinds of olefin-based monomers in the presence of a transition metal catalyst to form an intermediate having an olefin-based polymer block, reacting the intermediate styrene-based monomer in the presence of an alkyllithium compound to form a product having a styrene-based polymer block, and reacting the product with water, oxygen, or an organic acid to form a block copolymer wherein the number of moles of the alkyllithium compound used to form the product is larger than the number of moles of the organic zinc compound used to form the intermediate.

Method for producing block copolymer composition

A block copolymer composition is disclosed herein. In some embodiments, a block copolymer composition has a weight average molecular weight (M) of 70,000 g/mol to 120,000 g/mol, a polydispersity index (PDI) of 1.0 to 2.0, a glass transition temperature (T) of &#x2212;55&#xb0; C. to &#x2212;30&#xb0; C., and a melt index (MI), measured at 230&#xb0; C. and a loading condition of 5 kg, of 0.2 g/10 minutes to 3.0 g/10 minutes. The block copolymer composition has excellent processability.

Block copolymer composition

A block copolymer composition is disclosed herein. In some embodiments, the block copolymer composition includes a diblock copolymer and a triblock copolymer each including a polyolefin-based block and a polystyrene-based block. The diblock copolymer is present at less than or equal to 19% , based on total weight of the block copolymer composition, the polyolefin-based block includes a repeating unit represented by Formula 1, and the polystyrene-based block includes one or more of Formulas 2 and 3:  wherein Ris hydrogen, C3 to C20 alkyl, or C3 to C20 alkyl substituted with silyl, Rand Rare each independently C6 to C20 aryl, or C6 to C20 aryl substituted with halogen, C1 to C12 alkyl, or C3 to C12 cycloalkyl, n is an integer from 1 to 10,000, and l and m are each independently an integer from 10 to 1,000.

A block copolymer composition is disclosed herein. In some embodiments, a block copolymer composition includes a diblock copolymer and a triblock copolymer, each including a polyolefin-based block and a polystyrene-based block, wherein the polyolefin-based blocks are present between 45 wt % to 90 wt %, wherein the polystyrene-based blocks are present between 10 wt % to 55 wt %, wherein the difference (&#x394;T) between a thermal decomposition initiation temperature and a thermal decomposition termination temperature (&#x394;T) measured by Thermo-Gravimetric Analysis (TGA) is 55&#xb0; C. or greater, and the diblock copolymer and the triblock copolymer do not have a residual unsaturated bond.

The present invention relates to a method for predicting the physical properties of polymers. More specifically, the present invention relates to a method for predicting the processability of polymers using a molecular weight distribution curve.

Method for predicting physical properties of polymers

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

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

The present invention relates to a method for predicting the physical properties of polymers. More specifically, the present invention relates to a method for predicting long-term stability of polymers using a molecular weight distribution curve.

The present invention relates to a ligand compound, a catalyst system for olefin oligomerization, and a method for oligomerizing olefins using the same. The ligand compound according to the present invention has a structure in which a substituent is substituted in the trans form, and thereby when used for olefin oligomerization, the activity of the catalyst used and the selectivity of 1-hexene and 1-octene can be increased.

Ligand compound, catalyst system for olefin oligomerization, and method for oligomerizing olefins using the same

The present invention relates to a 1-octene composition. The 1-octene composition according to the present invention is prepared by ethylene oligomerization and comprises a high content of 1-octene and monomers useful for copolymerization of 1-octene at the same time.

1-octene composition

The present disclosure relates to a method for oligomerization of olefins. The method for oligomerization of olefins according to the present disclosure not only provides excellent catalytic activity and stable process operation, but also exhibits high selectivity to 1-hexene or 1-octene by using a catalyst system including an activity modifier.

Method for oligomerization of olefins

The present invention relates to a compound represented by the chemical formula 1, a catalyst system for olefin oligomerization comprising the same, and a method for oligomerizign olefins using the same, and the catalyst system for olefin oligomerization according to the present invention has excellent catalytic activity as well as high selectivity for 1-hexene or 1-octene, thereby enabling more efficient preparation of alpha-olefins.

Growing community of inventors

Daejeon, South Korea

Yoon Ki Hong