ADHESIVE COMPOSITION AND ADHESIVE SHEET FOR SURFACE PROTECTION

摘要

An adhesive composition comprising: a copolymer (i) that is a copolymer (I) having a structure expressed by the general formula [A-B]n (n is an integer of 1-3 inclusive), or a hydrogenation product thereof; and a copolymer (ii) that is a copolymer (II) having a structure expressed by the general formula A-B-A or the general formula (A-B)x-Y (In the formula, x is an integer of one or more, and Y is a coupling agent residue), or a hydrogenation product thereof. The vinyl bond content of the conjugated diene unit of the polymer block (B) is 70-85%, and the content of alkenyl aromatic compound units in all of the polymer blocks (B), on the basis of the total monomer mass of copolymers (i) and (ii), is 15-35 mass% (A: a block comprising primarily alkenyl aromatic compound units in which the alkenyl aromatic compound unit is continuous. B: a block randomly comprising conjugated diene units and alkenyl aromatic compound units.).