FUNCTIONALIZED VINYL AROMATIC HYDROCARBON-CONJUGATED DIENE BLOCK COPOLYMER COMPOSITION, METHOD OF PREPARING THE SAME AND ASPHALT COMPOSITION COMPRISING THE SAME

摘要

PURPOSE: A functionalized vinyl aromatic hydrocarbon-conjugated diene block copolymer composition is provided to improve low-temperature elongation and softening point of an asphalt composition. CONSTITUTION: A functionalized vinyl aromatic hydrocarbon-conjugated diene block copolymer composition comprises: a vinyl aromatic hydrocarbon-conjugated diene diblock copolymer which has aldehyde groups are bonded to the backbone of a conjugated diene block; and a vinyl aromatic hydrocarbon-conjugated diene multiblock copolymer which has aldehyde groups boned to the backbone of a conjugated diene block. The content of the diblock copolymer and the multiblock copolymer are 0-60 weight% and 40-100 weight% respectively. The functionalized vinyl aromatic hydrocarbon-conjugated diene block copolymers are coupled by a coupling agent. [Reference numerals] (AA) Before fusing block copolymer; (BB,DD) X 400; (CC) After fusing block copolymer