Korea Kumho Petrochemical Co., Ltd.

Hoo Chae Kim

Jae Yun Kim

Young Hoon Ko

Jin Man Hwang

Gwanghoon Kwag

Hyun-jong Paik

Jongyeop Lee

Seon Kyeong Cheong

Donghyuk Na

Mycong Seup So

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

This invention relates to a process for selectively hydrogenating the unsaturated double bonds of conjugated diene units of a homopolymer or copolymer. By using a highly active novel homogeneous organo titanium catalyst represented by formula (I) and lithium hydride (LiH) prepared in solution of organo lithium compound and hydrogen as a reducing agent, a polymer could be hydrogenated with significantly high yield and good reproducibility. In addition, this invention is characterized by a novel method in that when a copolymer containing a conjugated diene and vinyl-substituted aromatic hydrocarbon, the unsatured double bonds of conjugated diene units are selectively hydrogenated. In said formula where, Cp is a cyclopentadienyl group (CH); Rand Rare the same or different and are selected from halogen atom; Rand Rare the same of different and are selected from hydrogen atoms, alkyl or alkoxy group containing 1 to 12 carbon atoms, aryl or aryloxy groups containing 6 to 20 carbon atoms and cycloalkyl groups containing 6 to 20 carbon atoms.

Process for hydrogenating a conjugated diene polymer

Method for the selective hydrogenation of polymer containing conjugated diene

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Daejeon, South Korea

Hoo Chae Kim