Lg Chem, Ltd

Woo Seok Choi

Byoung Yun Kim

Jae Min Lee

Se Eun Lee

In Sung Jo

Hyung Woon Yoon

Sung Min Son

Insung Jo

Provided are an acrylic-based copolymer composition, a method of preparing the same, and an acrylic-based rubber composition obtained from the acrylic-based copolymer composition. Specifically, an acrylic-based copolymer composition prepared by polymerizing the acrylic-based copolymers each at high and low temperatures and mixing the acrylic-based copolymers, thereby having improved processability is provided.

Acrylic-based copolymer composition, method for preparing the same and acrylic-based rubber composition

Provided are a preparation method of a nitrile-based rubber, a nitrile-based rubber prepared therefrom, and a rubber composition including the nitrile-based rubber, and the nitrile-based rubber has a low content of a residual emulsifier and excellent mechanical physical properties by using a emulsifier mixture including a first emulsifier including a sulfosuccinate ester-based compound, and a second emulsifier including a fatty acid or a metal salt thereof, or a rosin acid or a metal salt thereof, each of which has 12 to 18 carbon atoms and a monocarboxyl group, wherein the first emulsifier and the second emulsifier are included at a weight ratio of 2:1 to 6:1.

Method for manufacturing nitrile-based rubber, nitrile-based rubber manufactured thereby, and rubber composition comprising same rubber

A conjugated diene-based copolymer composition, a method of preparing the same, and a rubber composition including the same are provided. The conjugated diene-based copolymer composition includes a first conjugated diene-based copolymer and a second conjugated diene-based copolymer each including a repeating unit derived from an aromatic vinyl monomer, a repeating unit derived from a conjugated diene-based monomer, and a repeating unit derived from a hydroxyalkyl (meth)acrylate monomer. The first conjugated diene-based copolymer includes 0.01 wt % to 1 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer, and the second conjugated diene-based copolymer includes 4.5 wt % to 6.5 wt % of the repeating unit derived from the hydroxyalkyl (meth)acrylate monomer.

Conjugated diene-based copolymer composition, method of preparing the same, and rubber composition including the same

A conjugated diene-based copolymer composition is provided. The conjugated diene-based copolymer composition includes a first conjugated diene-based copolymer having 20 wt % to 60 wt % of an aromatic vinyl monomer-derived repeating unit, 35 wt % to 75 wt % of a first conjugated diene-based monomer-derived repeating unit, and 1 wt % to 10 wt % of a hydroxyalkyl (meth)acrylate monomer-derived repeating unit. The first conjugated diene-based copolymer has a Mooney viscosity (MV) at 100&#xb0; C. of 30 to 120. The conjugated diene-based copolymer composition also includes a second conjugated diene-based copolymer having 20 wt % to 60 wt % of an &#x3b1;-methylstyrene monomer-derived repeating unit and 40 wt % to 80 wt % of a second conjugated diene-based monomer-derived repeating unit. The second conjugated copolymer has a Mooney viscosity (MV) at 100&#xb0; C. of more than 120 and equal to or less than 200. A method for preparing the conjugated diene-based copolymer is also provided.

Conjugated-diene based copolymer composition, method for preparing the copolymer composition and rubber composition comprising the copolymer composition

Provided is a method for preparing a conjugated diene-based copolymer, a conjugated diene-based copolymer prepared therefrom, and a rubber composition including the same.

Method for preparing conjugated diene-based copolymer, conjugated diene-based copolymer prepared therefrom, rubber composition comprising the same

The present invention relates to a styrene-butadiene rubber compound and a rubber composition for tire bead fillers including the same, and more particularly, to a styrene-butadiene rubber compound capable of improving stiffness and hardness even when styrene-butadiene rubbers having different styrene contents are used instead of a combination of a conventional natural rubber and a phenol-based resin, and a rubber composition for tire bead fillers including the same.

Styrene-butadiene rubber compound and rubber composition for tire bead fillers comprising the same

The present invention relates to a method for preparing styrene-butadiene rubber in which a molecular weight modifier containing two or more components is used in a polymerization reaction and each of the two or more components is added at a optimal time, and the method is capable of improving physical properties of the prepared styrene-butadiene rubber, and styrene-butadiene rubber prepared thereby. The styrene-butadiene rubber prepared according to the preparation method of the present invention has improvement in characteristics such as tensile strength, elongation, etc., and thus may be usefully used in the production of a tire having environmental friendliness, abrasion resistance, and the like.

Method for preparing styrene-butadiene rubber and styrene-butadiene rubber

The present invention relates to a method for preparing a low styrene-butadiene rubber having a low combined styrene content and, more particular, to a method for preparing a low styrene-butadiene rubber, wherein the low styrene-butadiene rubber contributes to an excellent polymerization rate and vulcanization rate by using an aliphatic organic acid and a sulfonate based compound as emulsifiers, and is excellent in heat stability after blending, thereby improving the workability and viscosity in in roll processing, such that the low styrene-butadiene rubber is advantageous to produce a molded article with improved rigidity and hardness when mixed with a high styrene-butadiene rubber.

Method for preparing styrene-butadiene rubber having low combined styrene content

Provided are a method for preparing a nitrile-based rubber having an amount of ethylenically unsaturated nitrile of 34 wt % or less including preparing a polymer by performing a polymerization reaction by adding an ethylenically unsaturated nitrile-based monomer in two or more portions to a conjugated diene-based monomer, and coagulating the polymer by adding a sulfur-based coagulant to the polymer, and a nitrile-based rubber thus prepared having improved mechanical properties as well as excellent processability and low temperature characteristics.

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Daejeon, South Korea

Woo Seok Choi