Korea Kumho Petrochemical Co., Ltd.

Iowa State University Research Foundation, Inc.

Kumho Petrochemical

Gwanghoon Kwag

Hanbaek Lee

Aaron David Sadow

Dong Hyuk Na

Jun Keol Choi

Bradley M Schmidt

Dong Eun Kang

Hoochae Kim

Hyung Kyu Choi

Seunghwon Lee

Jae Kon Suh

Du Seong Ahn

Dong Hwan Kim

Seung Su Kim

Bunyeoul Lee

Hanjoung Cho

Shin Han

Seung Hwa Lee

Seung Moo Huh

Jeon Koo Lee

Hwieon Park

Hoo Chae Kim

Sung Hoon Han

Hyun-jong Paik

Donghyuk Na

Aradhana Pindwal

Jongyeop Lee

Seunghyun Do

Pilsung Kim

Aju Kim

Jihae Park

Ahreum Kim

Hye Min Kim

A composition for seeded polymerization includes: a compound having dithioate; a mercaptan compound; an aromatic vinyl monomer; and a conjugated diene monomer.

Composition for seeded polymerization, a seed copolymer and a method for preparing the same

The present invention relates to a modified polymer having the structure of Formula (I) and Formula (IV): R, R, R, a, and n are as described herein and R, R', R&#x2033;, x, and k are as described herein and methods for preparation thereof. The present invention also relates to a compound having the structure of Formula (II):

End group functionalization agents for polydiene

A composition for seeded polymerization includes: a seed copolymer which has a compound having dithioate, a mercaptan compound, a first aromatic vinyl monomer, and a first conjugated diene monomer, and has an average particle diameter of 10-30 nm; a second aromatic vinyl monomer; and a second conjugated diene monomer.

Composition for seeded polymerization, a conjugated diene copolymer, an molded body, and a method for preparing the same

The present invention relates to a modified polymer having the structure of Formula (I) and Formula (IV): wherein A, R, R, R, a, and n are as described herein and wherein R, R', R&#x2033;, x, and k are as described herein and methods for preparation thereof. The present invention also relates to a compound having the structure of Formula (II): wherein A, R, R, R, a, and n are as described herein. The present invention also relates to a process for polymerizing unsaturated hydrocarbon monomers.

The present invention relates to processes for polymerizing unsaturated hydrocarbon monomers. The present invention also relates to a precatalyst having the structure of Formula (I):M{C(SiHAlk)}&#x2003;&#x2003;(I),and to a catalyst comprising the structure of Formula (II):MC(SiHAlk)X&#x2003;&#x2003;(II),and methods for preparation thereof.

Polymerization catalysts

The present invention relates to preparing high 1,4-trans-polybutadiene by polymerizing 1,3-butadiene or a butadiene derivative in a non-polar solvent in the presence of a catalyst system comprising a novel bimetallic cobalt-aluminum adduct, which makes it possible to prevent gel formation, control the molecular weight of the trans-polybutadiene and increase the trans content of the trans-polybutadiene. The catalyst system comprising the novel cobalt-aluminum adduct has a high oxidation state and structural stability, and the reactivity of the catalyst is controlled using novel activation systems comprising various allyloxy aluminum compounds.

Bimetallic cobalt-aluminum adduct catalyst system for preparing high trans-1,4-polybutadiene

A functional styrene-butadiene copolymer is disclosed. More specifically, the copolymer is prepared by radical polymerization of a styrene monomer, a butadiene monomer and an epoxy acrylate monomer in an emulsion state and ring-opening of the resultant styrene-butadiene-epoxy acrylate copolymer. When blended with silica, the disclosed copolymer provides excellent wet stopping performance and superior wear resistance. Therefore, it can be usefully applied for industrial materials including fuel-efficient tires, snow tires, belts, hoses, etc.

Functional styrene-butadiene copolymer

Disclosed is a conjugated diene random copolymer having an alkoxysilane unit, which is prepared by subjecting a conjugated diene monomer, an aromatic vinyl monomer and an alkoxysilane monomer having a specific structure to emulsion polymerization, and in which the copolymer contains an alkoxysilane unit in the backbone thereof and is thus enhanced in the degree of dispersion and affinity to an inorganic reinforcing material such as carbon black or silica, and is useful as a rubber material for tires having superior mechanical and dynamic properties.

Conjugated diene random copolymer having alkoxysilane unit

Provided is a method for preparing a styrene-butadiene copolymer having improved silica affinity through introduction of a novel reactive emulsifier. The styrene-butadiene copolymer prepared according to the disclosed method has superior affinity for thereby and thus has superior processability and tensile properties and remarkably improved dynamic properties. Therefore, when the styrene-butadiene copolymer according to the present invention is used as a tire tread material, it can greatly improve its physical properties.

Method for preparing styrene-butadiene copolymer using reactive emulsifier and styrene-butadiene copolymer prepared by the same

Provided is a functional styrene-butadiene copolymer having superior silica affinity. The copolymer is prepared by radical polymerizing a styrene monomer, a butadiene monomer and a reactive polyol monomer in emulsion state in order to maximize the mixing effect when compounding with silica. When mixed with silica, the disclosed styrene-butadiene copolymer provides excellent wet traction and superior abrasion resistance, and is suitable to be used for an industrial material of snow tires, belts, hoses, etc.

Styrene-butadiene copolymer highly functionalized with reactive polyol and manufacturing method thereof

Provided is an organic-inorganic nano composite, and more particularly, an organic-inorganic nano composite which is a product formed by the reaction of a styrene-butadiene copolymer; an acryl-based monomer; a living radical polymerization initiator; silica; and a coupling agent, in which radiality is maximized. The organic-inorganic nano composite has excellent tensile and tear properties, and high wet fraction capability. Thus, if the organic-inorganic nano composite according to the present invention is applied to organic filler for tires, rolling resistance can be decreased and wet traction capability can be increased, and the organic-inorganic nano composite can be efficiently applied to a hard coating material as well.

Organic-inorganic nano composites and preparation method thereof

The present invention relates to a method for preparing neodymium-carbon-nanotube and a process for preparing 1,4-cis-polybutadiene utilizing the same and more particularly, neodymium-carbon-nanotube. Neodymium is introduced by coordination with carboxylic acid, which is formed on the surface of carbon nanotube. In 1,3-butadiene polymerization with the neodymium-catalyst comprising the neodymium-carbon nanotube, a particular halogen compound, and a particular organometallic compound in an appropriate ratio, high 1,4-cis polybutadiene having molecular weight of 10,000 to 2,000,000 is produced, which exhibits excellent mechanical properties such as elasticity and durability.

Neodymium-carbon nanotube and method of preparing high 1,4-cis-polybutadiene using the same

Disclosed is a method of preparation of a siloxane-functionalized high 1,4-cis polybutadiene using a siloxane compound, in which the siloxane group expands the usage of the high 1,4-cis polybutadiene.

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Daejeon, South Korea

Gwanghoon Kwag