Korea Kumho Petrochemical Co., Ltd.

Seung-Hwon Lee

Gwang-Hoon Kwag

A-Ju Kim

Young-Chan Jang

Pil-Sung Kim

Hoo-Chae Kim

Han Baek Lee

Daejune Joe

Seung Hyun Do

Disclosed are a rubber polymer including a unit structure derived from a conjugated diene-based monomer and at least one of compounds represented by Chemical Formula 1 to Chemical Formula 4, a method of preparing the same, and a rubber composition including the same.

Rubber polymer, method for preparing thereof, and rubber composition comprising the same

Process for controlling degree of branch of high 1,4-cis polybutadiene

A method for preparing polybutadiene having controlled molecular weight and high 1,4-cis content over 95% in the presence of a diethylzinc compound as a cocatalyst (i.e., alkylating agent) and molecular-weight-controlling agent, in which the molecular weight of the polybutadiene is controlled by variating the added amount of the diethylzinc compound without deterioration of 1,4-cis content nor polymerization yield, thus guaranteeing the optimum processability and physical properties of polymer according to the use purpose.

Method for preparing polybutadiene having controlled molecular weight and high 1,4-cis content

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Taejeon, South Korea

Seung-Hwon Lee