Abstract: 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.

Abstract: 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.

Abstract: Disclosed are a novel chain transfer agent having a trichloromethyl functional group bonded at an end thereof, an end-modified styrene-butadiene copolymer prepared by using the chain transfer agent, and an organic-inorganic composite obtained by mixing the end-modified styrene-butadiene copolymer with silica. The disclosed end-modified styrene-butadiene copolymer has a high affinity with silica because its end is modified with a hydrophilic chain transfer agent. Thus, the organic-inorganic composite including the mixture of the copolymer with silica is useful as a material for the manufacture of rubber products such as a tire, a sole, a rubber hose, or a rubber belt.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Disclosed is a modified asphalt composition comprising asphalt and a tapered block copolymer, which contains short butadiene monomer blocks at both ends of aromatic vinyl monomer blocks, that provides comparable or better softening point when compared to conventional compositions, and exhibits superior ductility at low temperature, thereby being applicable to road paving, waterproof sheets and sealants.

Abstract: Disclosed is a modified asphalt composition obtained by blending asphalt with a complex block copolymer, which is prepared by polymerizing styrene in the presence of an anionic polymerization initiator to prepare a polystyrene solution, adding butadiene to the polystyrene solution, and then further polymerizing styrene, and wherein a triblock copolymer and diblock copolymer are present at a specific proportion. The modified asphalt composition of the present invention exhibits superior ductility at low temperature, while exhibiting comparable or better softening point as compared to conventional compositions, and, thus, is applicable to road paving, waterproof sheets and sealants.

Abstract: The present invention relates to the unbalanced multi-block styrene-butadiene-styrene (SBS) and provides the copolymer represented by the following structure, mB1*S1?lB2?S2?sB3, wherein B is a butadiene block, S is a styrene block, l, m, s are the relative size among the blocks (i.e., large size, middle size, and small size, respectively), and * is the tapered block between mB1 block and S1 block (i.e., random copolymer of a kind). They have to satisfy the following related expressions. 0.01lB2?mB1?0.5lB2 and 0.01mB1?sB3?0.5mB1 ??a) 0.5S1?S2?1.5S1 ??b) 5%?*%?25% ??c) In the related expression, the value of B1 and S1 include tapered block for the sake of convenience, and * % is the random styrene content in all the styrene in SBS. The unbalanced multi-block SBS of this invention exhibits excellent processability in the preparation of hot-melt adhesives, reducing processing hours.