Block copolymers and high shear strength pressure sensitive adhesive compositions comprising them
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0659787A1
公开(公告)日:1995-06-28
Linear block copolymers, comprising two terminal blocks of predominantly a monovinylaromatic compound and one block of predominantly a conjugated diene, having a monovinylaromatic content in the range of from 15 to 25 wt%, a total apparent molecular weight in the range of from 130,000 to 180,000 and a true molecular weight of poly(monovinylaromatic) blocks in the range of from 10,000 to 14,000, optionally mixed with minor amounts of diblock copolymer and comprising blocks similar to those of the triblock copolymer component, high shear strength pressure sensitive hot-melt adhesive compositions comprising said block copolymers, packaging tapes obtainable therewith, and process for the preparation of said adhesive compositions.
线性嵌段共聚物,包括两个主要由单乙烯基芳香族化合物组成的末端嵌段和一个主要由共轭二烯组成的嵌段,其单乙烯基芳香族含量在 15 至 25 wt%之间,总表观分子量在 130,000 至 180,000 之间,聚(单乙烯基芳香族)嵌段的真实分子量在 10、可选择与少量二嵌段共聚物混合,并包含与三嵌段共聚物组分类似的嵌段;包含所述嵌段共聚物的高剪切强度压敏型热熔粘合剂组合物;可用其获得的包装带;以及制备所述粘合剂组合物的工艺。