A METHOD FOR PREPARING FUNCTIONALIZED VINYL AROMATIC HYDROCARBON-CONJUGATED DIENE BLOCK COPOLYMER FOR POLYMER MODIFIED ASPALT, AND POLYMER MODIFIED ASPHALT USING THEREOF

摘要

The present invention relates to a vinyl aromatic hydrocarbon-conjugated diene block copolymer, a process for producing the vinyl aromatic hydrocarbon-conjugated diene block copolymer, and a polymer modified asphalt comprising the vinyl aromatic hydrocarbon-conjugated diene block copolymer. More particularly, An aromatic hydrocarbon-conjugated diene block copolymer, a process for producing the same, and a polymer modified asphalt comprising the same. According to the present invention, the functionalized degree of the block copolymer is expressed as a ratio of the weight average molecular weight before and after the functionalization, and the vinyl aromatic hydrocarbon-conjugated diene block copolymer having a molecular weight ratio of 0.9 to 1.1 is mixed with the asphalt The present invention provides a vinyl aromatic hydrocarbon-conjugated diene block copolymer having excellent compatibility and remarkably shortening the processing time and significantly improving low temperature properties and storage stability of asphalt properties, a process for producing the same, and an effect of providing a polymer modified asphalt containing the same have.