| 摘要 |
PROBLEM TO BE SOLVED: To obtain an adhesive composition with reduced melt viscosity and improved productivity and processability, useful as a hot-melt adhesive or the like by including a styrene-based block copolymer and a specific random copolymer. SOLUTION: This adhesive composition comprises (A) a styrene-based block copolymer and (B) a random copolymer composed mainly of an aromatic vinyl compound unit and isobutylene unit in the weight ratio A/B of pref. (100:1) to (1:100). In this case, it is recommended that the component A is such one as to have polymer block composed of an aromatic vinyl compound as hard segment, especially a block copolymer made from an aromatic vinyl compound and a conjugated diene, or a hydrogenated product thereof, or the like.
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