A pressure-sensitive adhesive composition having well-balanced pressure-sensitive adhesive force and cohesive force without causing any safety or economy problems, a process for the preparation of the same and pressure-sensitive adhesive sheets using the same are disclosed. The pressure-sensitive adhesive composition comprises a crosslinked polymer obtained by crosslinking a block copolymer comprising at least two of a styrene-based polymer block A and an acrylic polymer block B having a structural unit represented by the general formula (1): -[CH2-C(R1)COOR2]- wherein R1 represents a hydrogen atom or methyl group, and R2 represents a C2-14 alkyl group, bonded each other, such as A-B or B-A type block copolymer and A-B-A type block copolymer.
本发明公开了一种压敏胶组合物,该组合物具有均衡的压敏粘合力和内聚力,且不会造成任何安全或经济问题,还公开了制备该组合物的工艺以及使用该组合物的压敏胶片。压敏胶组合物包括一种交联聚合物,该聚合物通过交联嵌段共聚物获得,嵌段共聚物包括
苯乙烯基聚合物嵌段 A 和
丙烯酸聚合物嵌段 B 中的至少两种,其结构单元由通式(1)表示:-[CH2-C(R1)COOR2]-,其中 R1 代表氢原子或甲基,R2 代表 C2-14 烷基,相互键合,如 A-B 或 B-A 型嵌段共聚物和 A-B-A 型嵌段共聚物。