Block copolymer composition, and adhesive composition, modified asphalt composition, paving binder composition using the same, and method for producing block copolymer composition

摘要

PROBLEM TO BE SOLVED: To provide high adhesiveness, high tackiness, high holding force and thermal discoloration property during manufacturing an adhesive composition in the adhesive composition, high softening point, high low temperature elongation, low melting viscosity, high resistance to track digging, high thermal stability resistance and excellent low temperature bending property in a modified asphalt composition, and high softening point, high low temperature elongation, low melting viscosity, high resistance to track digging, high thermal stability resistance and high thermal discoloration resistance in a binder composition for paving.SOLUTION: There is provided a block copolymer composition containing 100 pts.mass of a block copolymer having a polymer block (A) mainly containing a vinyl aromatic monomer unit and a polymer block (B) containing a conjugated diene monomer unit and 0.3 to 5 pts.mass of a polymer mainly containing a vinyl aromatic monomer unit and having weight average molecular weight (Mw) of the polymer mainly containing the vinyl aromatic monomer unit of 5,000 to 30,000.SELECTED DRAWING: None