Lg Chem, Ltd

Jeong Heon Ahn

Suk Youn Kang

Hyo Jin Bae

Kyoung Hwan Oh

Hee Jung Jeon

Woo Jin Cho

Sung Ho Park

Soo Young Choi

Suk Joon Yoo

Su Hwa Kim

Jin Sook Ryu

Won Hee Kim

Dong Jo Ryu

Dong Hui Kim

Se Eun Lee

Seon Hee Han

Hyun Chul Jung

Wan Kyu Oh

Sae Hume Park

Ji Ha Kim

Yu Jin An

Ji Eun Kim

Jae Hyeong Park

Hyun Woong Park

Jeong Hoon Jo

Won Mun Choi

Sung Hyun Park

Seung Ho Choi

Heung Yeal Choi

Young Shil Do

Yu Ra Lee

Won Seok Kim

Chan Hong Lee

Byung Tae Yang

Sin Gun Kang

Sae Young Yun

The present invention relates to a method of producing an acrylonitrile dimer, the method including: feeding an acrylonitrile monomer, a nonpolar solvent, an alcohol solvent, and a phosphorus-based catalyst to a dimerization reactor to perform a dimerization reaction and reaction product to a distillation column; feeding the acrylonitrile monomer, the nonpolar solvent, and the alcohol solvent from the distillation column to the dimerization reactor; feeding an acrylonitrile dimer and the phosphorus-based catalyst from the distillation column to an extraction device; oxidizing the phosphorus-based catalyst by feeding water including an acid component to the extraction device to inactivate the phosphorus-based catalyst; and separating the inactivated phosphorus-based catalyst and the acrylonitrile dimer.

Method of producing acrylonitrile dimer

Provided is a method of preparing an acrylonitrile dimer, the method including: supplying an acrylonitrile monomer, a phosphorus-based catalyst, an alcohol solvent, and an ionic liquid to a reactor to perform a dimerization reaction to prepare a single-phase dimerization reaction product (S10); supplying a reactor discharge stream including the dimerization reaction product to a first distillation column, separating the alcohol solvent and an unreacted acrylonitrile monomer from an upper discharge stream, and supplying a lower discharge stream including an acrylonitrile dimer, the ionic liquid, and the phosphorus-based catalyst to a second distillation column (S20); and separating an upper discharge stream including the acrylonitrile dimer and separating a lower discharge stream including the ionic liquid and the phosphorus-based catalyst, from the second distillation column (S30).

Method for preparing acrylonitrile dimer

Provided is a method of preparing an acrylonitrile dimer including: supplying an acrylonitrile monomer, a phosphorus-based catalyst, and an alcohol solvent to a reactor to perform a dimerization reaction to produce dimerized reactants (S); cooling the dimerized reactants to crystallize the phosphorus-based catalyst (S); separating the crystallized phosphorus-based catalyst (S); and supplying the dimerized reactants from which the phosphorus-based catalyst is separated to a distillation column to separate the acrylonitrile dimer (S).

Method of preparing acrylonitrile dimer

A modified conjugated diene-based polymer having high linearity and improved compounding properties is provided. The modified conjugated diene-based polymer includes phosphor, sulfur and chlorine in specific amount ranges, and the degree of branching is controlled, and accordingly, if applied to a rubber composition, tensile strength and viscoelasticity may be excellent, and processability may be markedly improved.

Modified conjugated diene-based polymer and rubber composition comprising same

A method for preparing a modified conjugated diene-based polymer is provided. The method is characterized in adding a polyoxyethylene phosphate ester-based compound having a specific structure together with sulfur chloride modifier during modification, by which modification reproducibility may be markedly improved, stable process may be performed, the changing degree of the physical properties, specifically a Mooney viscosity increasing ratio and the degree of branching of a modified conjugated diene-based polymer according to modification conditions may be anticipated, and the changing degree of a Mooney viscosity increasing ratio and the degree of branching may be easily controlled by controlling modification conditions.

Method for preparing modified conjugated diene-based polymer

The present invention relates to a rubber composition having excellent tensile properties and viscoelasticity properties and including a conjugated diene-based polymer. The rubber composition may include a modified conjugated diene-based polymer which is selected considering target tensile properties and viscoelasticity properties, by predicting in advance the correlation between the modification ratio of the modified conjugated diene-based polymer and the dynamic viscoelasticity loss coefficient at 60&#xb0; C. of the rubber composition through Mathematical Formula 1 and Mathematical Formula 2. Therefore, excellent compounding properties may be shown.

Rubber composition

A method for preparing a catalyst for use in polymerizing a conjugated diene-based monomer, the catalyst, and a method for preparing a conjugated diene-based polymer using the same are disclosed herein. In an embodiment, a method of preparing a catalyst comprises mixing a lanthanide rare earth element-containing compound, an alkylating agent compound and a halogen compound in the presence of a solvent to prepare a catalyst composition, adding a conjugated diene-based monomer to the catalyst composition to form a preformed catalyst composition, and aging the preformed catalyst composition at a temperature of &#x2212;1&#xb0; C. to &#x2212;15&#xb0; C. for 3 hours to 98 hours to prepare the catalyst. The catalyst has excellent catalyst activity and polymerization reactivity and is useful for preparing a conjugated diene-based polymer which has an excellent modification ratio and improved compounding properties.

Method for preparing catalyst for polymerizing conjugated diene, catalyst and method for preparing conjugated diene-based polymer using the same

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 provides a modifier, a modified and conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified and conjugated diene-based polymer, and more particularly, a modifier which includes a compound represented by Formula 1 and is capable of improving the mixing properties between a conjugated diene-based polymer and a filler, a modified and conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified and conjugated diene-based polymer.

Modifier, modified and conjugated diene-based polymer and rubber composition including 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

A method for preparing a modified conjugated diene-based polymer having excellent compounding properties and improved processability is disclosed herein. According to the method, a first polymer including a functional group is prepared using a modifier represented by Formula 1, and the first polymer is mixed with a sulfur halide. A modified conjugated diene-based polymer having excellent affinity with a filler, excellent compounding properties such as tensile properties and viscoelasticity properties, and excellent compounding processability, may be prepared.

The present invention relates to a modified conjugated diene-based polymer having a high modification ratio with improved compounding properties by being excellent affinity with a filler and a method for preparing the same. The modified conjugated diene-based polymer thus prepared includes a functional group derived from a compound represented by Formula 1 at one terminal, and has excellent affinity with a filler. If the modified conjugated diene-based polymer is applied to a rubber composition, excellent processability, tensile strength and viscoelasticity may be achieved.

Modified conjugated diene-based polymer and method for preparing the same

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;Sn&#x2014;(X)&#x2003;&#x2003;[Formula 1]wherein, a, X, and Xare the same as defined in the disclosure.

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

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.

The present invention provides a modifier, a modified conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified conjugated diene-based polymer, and more particularly, a modifier which includes a compound represented by Formula 1 and is capable of improving the mixing properties between a conjugated diene-based polymer and a filler, a modified conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified conjugated diene-based polymer.

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Daejeon, South Korea

Jeong Heon Ahn