Patent ID: 8563646
Filing Date: 2013-10-22
Classification: C08L,C09J

Abstract:
1. An adhesive composition comprising 100 parts by mass of (1) a hydrogenated block copolymer and 20 to 400 parts by mass of (2) a tackifier, the hydrogenated block copolymer having 30 to 90% by mass of (1-A) below and 70 to 10% by mass of (1-B) below: (1-A) a hydrogenated block copolymer that comprises a polymer block mainly composed of a vinyl aromatic hydrocarbon and a polymer block mainly composed of a conjugated diene compound, and satisfies requirements (a) to (c) below: (a) a total degree of hydrogenation H (%) of unsaturated double bonds based on the conjugated diene compound is 10 to 80%, (b) a content of the vinyl aromatic hydrocarbon is 30 to 60% by mass, and (c) a peak molecular weight is 30,000 to 60,000; and (1-B) a hydrogenated block copolymer that comprises a polymer block mainly composed of not less than two vinyl aromatic hydrocarbons and a polymer block mainly composed of a conjugated diene compound, and satisfies requirements (d) to (f) below: (d) a total degree of hydrogenation H (%) of unsaturated double bonds based on the conjugated diene compound is 10 to 80%, (e) a content of the vinyl aromatic hydrocarbons is 30 to 60% by mass, and (f) a peak molecular weight is from 65,000 to 95,000.