Lg Chem, Ltd

Industry-University Cooperation Foundation Hanyang University

Iucf-hyu

Bridgestone Corporation

No Ma Kim

Sung Soo Yoon

In Ho Hwang

Min Ki Lee

Jeong Min Ha

Ho Young Lee

In Kyu Park

Youk Reol Na

Kee Young Kim

Ro Mi Lee

Heung Yeal Choi

He Seung Lee

Min Sik Mun

Hae Sung Sohn

Jin Young Kim

Sang Mi Lee

Yu Jin Kim

Han Na Chi

Tae Chul Lee

Jeong Ae Yoon

Su Jeong Kim

Kyung Chang Seo

Sun Keun Kim

Suk Ky Chang

In Cheon Han

Ki Seok Son

Ki Ok Kwon

Da Won Chai

Min Joon Kim

Kyun Il Rah

Sung Hyun Nam

Jae Sun Choi

Hyoung Woo Lee

Seung Joon Park

An Na Lee

Je Gwon Lee

Won Hee Kim

Eun Ji Shin

Se Ra Kim

Jae Hoon Choe

Jun Seok Ko

Min Soo Kim

Woo Ha Kim

Hyun Jin Lee

Hyun Jun Kim

Seong Du Lee

Yang Kyoo Han

Hyeon Jong Park

Jae Gwan Lee

Su Min Na

Young Jun Hong

Jung Hee Lee

Hyun Ju Cho

Moon Seok Chun

Jong Pil Kim

Soo Yong Lee

Yeon Sik Jung

Suk Joon Yoo

Eun Soo Huh

Bong Keun Lee

Kyung An Kwon

Su Hwa Kim

You Seok Seo

Eun Mi Seo

Jung Hwan Oh

Gi Ra Yi

Sung Su Kim

Geun Seung Baek

Jae Moon Jun

Sang Jo Bae

Ryota Sone

Tae Chui Lee

Jeong Jin Hong

Jine Young Lee

A modified conjugated diene-based polymer including a repeating unit from a conjugated diene-based monomer; a derived unit from an N-containing aromatic hydrocarbon compound; a derived unit from an S-containing aromatic hydrocarbon compound or an S-containing heterocycle compound, and Si. Each of Si content and N content is 50 ppm or more based on the total weight of the polymer. The modified conjugated diene-based polymer satisfies the following conditions: (i) molecular weight distribution (PDI; MWD): 1.0 or more and less than 3.0; and (ii) a S content is 25 ppm or more based on a total weight of the polymer.

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

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

The present invention relates to a method for preparing a modification initiator, the method capable of reducing side reactions to the minimum and obtaining the modification initiator with a high conversion rate, and an apparatus for performing the same, wherein the method includes (S1) reacting a first fluid including a modification functional group-containing compound and a conjugated diene-based monomer and a second fluid including a polymerization initiation functional group-containing compound, and (S2) obtaining a third fluid including a modification initiator prepared by the reaction of Step S1, wherein the modification functional group-containing compound is used in a ratio of greater than 1 mole based on 1 mole of the polymerization initiation functional group-containing compound, the conjugated diene-based monomer is used in a ratio of 1 mole to 4 moles based on 1 mole of the modification functional group-containing compound, and Step S1 and Step S2 are continuously performed.

Method for preparing modification initiator and apparatus for preparing the same

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. In some embodiments, a modified conjugated diene-based polymer satisfying the conditions of i) a mooney viscosity from 75 to less than 100, measured in accordance with ASTM D1646 at 110° C., ii) a mooney stress relaxation ratio 0.4 or less, measured at 110° C., iii) a weight average molecular weight (Mw) of 750,000 g/mol or more, and iv) a molecular weight distribution from 1.0 to 2.0, wherein the molecular weight distribution is a ratio of Mw to the number average molecular weight (Mn).

A continuous preparation system of a conjugated diene-based polymer having improved rolling resistance properties is provided. By utilizing the continuous preparation system a polymerization conversion ratio at an initial stage of polymerization is easy to control, long time operation is possible and productivity is excellent.

Continuous preparation system of conjugated diene-based polymer

A modifying agent, a modified conjugated diene polymer prepared using the same, a method for preparing a modified conjugated diene polymer, and a rubber composition including a modified conjugated diene polymer are disclosed herein. In some embodiments, a modifying agent comprises a compound represented by formula 1. The modifying agent is capable of improving processability of a rubber composition including the polymer prepared using the modifying agent. Fuel consumption properties of a car using tires including the rubber composition may be improved.

Modifying agent and modified conjugated diene polymer prepared by using the same

A rubber composition having excellent abrasion resistance and improved viscoelasticity properties, and a tire manufactured using the same are disclosed herein. In some embodiments, a rubber composition includes a first synthetic rubber and a second synthetic rubber, and has an interaction parameter (χ) defined by Mathematical Formula 1 at room temperature is 2.0×10or more. The first synthetic rubber is a solution-polymerized modified conjugated diene-based rubber which has a 1,2-vinyl bond content of 50 wt % or more and includes a functional group bonded to at least one terminal, and the second synthetic rubber is a conjugated diene-based rubber which has a 1,2-vinyl bond content of less than 50 wt %.

Rubber composition and molded article manufactured therefrom

A modified conjugated diene-based polymer is provided, having remarkable processability and excellent tensile strength and viscoelasticity properties, and a rubber composition including the same is also provided. The modified conjugated diene-based polymer has a unimodal shape molecular weight distribution curve by gel permeation chromatography, narrow molecular weight distribution and a Mooney stress-relaxation ratio of 0.7 or more, and includes a functional group derived from a modifier represented by Formula 1, and thus has remarkable processability and excellent tensile properties and viscoelasticity properties.

A modifying conjugated diene-based polymer, a method for preparing the same and a method for preparing the same are disclosed, herein. The modified conjugated diene-based polymer has excellent affinity with a filler and may improve the compounding properties of the conjugated diene-based polymer. In some embodiments, a modified conjugated diene-based polymer including a repeating unit derived from a conjugated diene-based monomer and a functional group derived from a modifier represented by Formula 1 in at least one terminal thereof.

Modifier, modified conjugated diene-based polymer comprising thereof and method for preparing the polymer

The present invention provides a method for preparing a modified and conjugated diene-based polymer, which may prevent processability degradation by restraining the increase of mooney viscosity during post-treatment using steam with high temperature or storage for a long time by stabilizing a modified polymer using a modification stabilizer, and a modified and conjugated diene-based polymer prepared by the preparation method.

Method for preparing modified and conjugated diene-based polymer and modified and conjugated diene-based polymer prepared using the same

The present invention relates to a modified conjugated diene-based polymer, more particularly, a modified conjugated diene-based polymer prepared by continuous polymerization and accordingly, having specific polymer structure, molecular weight distribution and shape, excellent processability and narrow molecular weight distribution, a unimodal shape molecular weight distribution curve by gel permeation chromatography (GPC), and molecular weight distribution (PDI; MWD) of 1.0 to less than 1.7, and including a functional group derived from a modifier represented by Formula 1 at one terminal and a functional group derived from a modification initiator at the other terminal.

Modified conjugated diene-based polymer

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. In some embodiments, the modified conjugated diene-based polymer includes a modified monomer-derived functional group represented by Formula 1, and an aminoalkoxysilane-based modifier-derived functional group at least one end thereof, wherein the polymer having a unimodal molecular weight distribution, and a polydispersity index (PDI) of 1.0 or more to less than 1.7. The polymer has a narrow and unimodal molecular weight distribution, and has excellent tensile properties and viscoelastic properties while having excellent processability.

The present invention relates to a rubber composition having excellent abrasion resistance and improved tensile properties and viscoelasticity properties by controlling compatibility among rubber components, and a tire manufactured using the same.

Rubber composition

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. In some embodiments, the modified conjugated diene-based polymer includes a functional group derived from a modification monomer represented by Formula 1 and a functional group derived from a modifier, and the polymer has a unimodal molecular weight distribution, and a polydispersity index of 1.0 to less than 1.7. The polymer has excellent processability, tensile properties and viscoelasticity properties.

A modified conjugated diene-based polymer, and more particularly, a modified conjugated diene-based polymer having a unimodal molecular weight distribution curve measured by gel permeation chromatography (GPC), molecular weight distribution (PDI; MWD) of less than 1.7, and a Si content of 100 ppm or more based on weight, and including a repeating unit derived from an aromatic vinyl monomer in an amount from 15 wt % to less than 30 wt %, and a rubber composition including the same.

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Daejeon, South Korea

No Ma Kim