黏着剂组成物;ADHESIVE COMPOSITION

摘要

本发明之黏着剂组成物含有具有嵌段(A)及嵌段(B)、且酸值为8mgKOH/g以上之嵌段共聚物(X)，上述嵌段(A)之玻璃转移点为75℃以上且含有具有环状结构之单体单位及含羧基之单体单位，上述嵌段(B)含有70质量%以上之下述通式(1)表示之丙烯酸酯单位；且上述嵌段(A)与上述嵌段(B)之质量比率(嵌段(A)/嵌段(B))为10/90~30/70，上述嵌段(A)位于上述嵌段共聚物(X)之至少一末端，并且于上述一末端上述嵌段(B)被上述嵌段(A)所夹。;CH2=CR 1 -COOR 2 …(1);式(1)中，R 1 为氢原子，R 2 为碳数8以下之直链之烷基或烷氧基烷基。 An adhesive composition of the present invention includes: a block copolymer (X) containing a block (A) containing a monomer unit having a cyclic structure and a carboxy group-containing monomer unit, and a block (B) containing an acrylic acid ester unit 70 mass% or more which is represented by a general formula (1) below. A grass -transition point of the block (A) is 75℃;CH2= CR 1 -COOR 2 …(1) ;In the formula (1), R 1 is a hydrogen atom, and R 2 is an alkoxyalkyl group or an alkyl group of a straight chain having 8 or less carbon atoms.