An acrylic diblock copolymer of the general formula (I) useful in producing pressure-sensitive adhesives which are improved in cohesive force, tack and hot-melt applicability without impairing the heat resistance and weather resistance; and pressure-sensitive adhesive compositions containing the copolymer: X·Y (I) in which X is a polymer block composed of alkyl methacrylate units wherein the alkyl is one having 1 to 4 carbon atoms or one having a cyclic structure; Y is a polymer block composed of alkyl acrylate units wherein the alkyl has 1 to 20 carbon atoms and/or alkyl methacrylate units wherein the alkyl has 5 to 20 carbon atoms; the weight-average molecular weight (Mw) of X is 1,000 to 8,000; and the X/Y mass ratio ranges from 1/99 to 10/90.
一种通式(I)的
丙烯酸二嵌段共聚物,可用于生产内聚力、粘性和热熔适用性均得到改善而耐热性和耐候性不受影响的压敏胶;以及含有该共聚物的压敏胶组合物:X-Y (I),其中 X 是由
甲基丙烯酸烷基酯单元组成的聚合物嵌段,其中烷基具有 1 至 4 个碳原子或具有环状结构;Y 是由
丙烯酸烷基酯单元组成的聚合物嵌段,其中烷基具有 1 至 20 个碳原子和/或
甲基丙烯酸烷基酯单元,其中烷基具有 5 至 20 个碳原子;X 的重量平均分子量(Mw)为 1,000 至 8,000;X/Y 的质量比为 1/99 至 10/90。