Korea Kumho Petrochemical Co., Ltd.

Sun Woo Cheen

Jae Yun Kim

Young Hoon Ko

Min Sung Kwon

Seung Il Kim

Dong Hyuk Na

Byoung Tak Yim

Nam Hoon Baik

Eun Kyung No

Disclosed is a modified asphalt composition including a styrenic block copolymer and a vegetable wax as modifier. With lower viscosity at high temperatures as compared to the asphalt composition modified only with the styrenic block copolymer, it can be manufactured and used at lower temperatures. Also, with higher ductility at low temperatures, it can minimize fatigue crack even in cold weathers.

Asphalt compositions modified by styrenic block copolymer and vegetable wax

The present invention relates to the unbalanced multi-block styrene-butadiene-styrene (SBS) and provides the copolymer represented by the following structure, mB1*S1&#x2212;lB2&#x2212;S2&#x2212;sB3, The unbalanced multi-block SBS of this invention exhibits excellent processability in the preparation of hot-melt adhesives, reducing processing hours. It also exhibits good adhesive properties such as initial loop tack, 180&#xb0; peel strength, and holding power, and it has a normal level of heat resistance.

Unbalanced multi-block SBS and method for the preparation thereof

End-modified styrene-diene block copolymer prepared using polyfunctional coupling agent

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Daejeon, South Korea

Sun Woo Cheen