Lg Chem, Ltd

Suk Joon Yoo

Jin Young Kim

Jeong Heon Ahn

Suk Youn Kang

Soo Young Choi

Sung Ho Park

Woo Jin Cho

Jin Sook Ryu

Hyeon Jong Park

Geun Seung Baek

No Ma Kim

Hee Jung Jeon

Ro Mi Lee

Kyoung Hwan Oh

Dong Hui Kim

Yu Jin Kim

Hyo Jin Bae

Youk Reol Na

He Seung Lee

Hyun Jun Kim

Jae Sun Choi

Su Hwa Kim

You Seok Seo

Yu Ra Lee

Jung Hwan Oh

Hye Young Kim

Hye Jung Shin

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. The modified conjugated diene-based polymer has excellent processability and good tensile strength and viscoelasticity. In some embodiments, a modified conjugated diene-based polymer includes a derived unit from a modifier, the modifier including three or more alkoxy groups bonded to silicon; a non-functional chain forming a silicon-carbon bond at one side of the derived unit from a modifier and including a repeating unit derived from a conjugated diene-based monomer; and a functional chain forming a silicon-carbon bond at the other side of the derived unit from a modifier and including two or more derived units from an N-functional group-containing monomer.

Modified conjugated diene-based polymer and rubber composition including the same

The present disclosure relates to a modified conjugated diene-based polymer and a rubber composition including the same, and provides a modified conjugated diene-based polymer including a first polymer chain and a second polymer chain, including a repeating unit derived from a conjugated diene-based monomer and a derived unit from a nitrogen-containing modification initiator, in each, wherein the first polymer chain includes a derived unit from an aminoalkoxysilane-based modifier in at least one terminal, the second polymer chain includes a derived unit from an aminoepoxy-based modifier in at least one terminal, and the aminoalkoxysilane-based modifier includes 6 or more alkoxy groups in a molecule.

A modified conjugated diene-based polymer, a rubber composition including the same, and a method of making the same are disclosed herein. The modified conjugated diene-based polymer has excellent processability and good tensile strength and viscoelasticity. In some embodiments, a modified conjugated diene-based polymer includes a first chain including a repeating unit derived from a conjugated diene-based monomer, a second chain including a repeating unit derived from a compound represented by Formula 1, and a derived unit from an alkoxysilane-based modifier, wherein the first chain and the second chain are coupled by the derived unit from the alkoxysilane-based modifier.

Modified conjugated diene-based polymer, method for preparing the same and rubber composition including the same

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. The modified conjugated diene-based polymer has excellent processability and good tensile strength and viscoelasticity. In some embodiments, a modified conjugated diene-based polymer includes silicon (Si) and nitrogen (N), and has an N content of 150 ppm or more based on the weight of the modified conjugated diene-based polymer and a rate of change of mooney viscosity (MV) of 20% or less.

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 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.

Modifier, modified and conjugated diene-based polymer and rubber composition including 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] In Formula 1, a, X, and Xare the same as defined in the disclosure.

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Daejeon, South Korea

Suk Joon Yoo