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

摘要

PURPOSE: A manufacturing method of a vinyl aromatic group hydrocarbon-conjugated diene block copolymer is provided to remarkably reduce process time and to provide a hydrocarbon-conjugated diene block copolymer remarkably increase a low temperature elongation and storage stability. CONSTITUTION: A manufacturing method of a vinyl aromatic group hydrocarbon-conjugated diene block copolymer comprises a step of functionalizing a vinyl aromatic-conjugated diene block copolymer the ratio of weight average molecular weight between vinyl aromatic group-conjugated diene block copolymers before and after the functionalization is 0.9-1.1. before the functionalization the vinyl aromatic group-conjugated diene block copolymer consists of a triblock copolymer and diblock copolymer. The triblock copolymer is 40-100 weight% and the diblock copolymer is 0-60 weight%. [Reference numerals] (AA) Before block copolymer melting(x 400); (BB) After block copolymer melting(x 400)