| 摘要 |
PROBLEM TO BE SOLVED: To provide an adhesive composition excellent in adhesive performance such as adhesive force, processability, heat resistance performance and morphological stability.SOLUTION: An adhesive composition contains (a) a block copolymer containing (A) a polymer block mainly containing a vinyl aromatic monomer unit and (B) a polymer block mainly containing a conjugated diene monomer unit, and satisfying following requirements of (1) and (2): 15 to 25 mass%, (b) a tackifier resin: 35 to 65 mass%, (c) a styrenic polymer having a number average molecular weight of 2000 to 8000: 5 to 15 mass%, and (d) a softener: 5 to 30 mass%. (1) The percentage of the vinyl aromatic monomer in the (a) block copolymer is 25 to 45 mass%. (2) The vinyl binding amount in the (B) polymer block mainly containing the conjugated diene monomer unit is 25 to 45 mass%. |
