申请人:ASAHI KASEI KABUSHIKI KAISHA
公开号:EP3098264A1
公开(公告)日:2016-11-30
There is provided a block copolymer composition having 20% by mass or more and 90% by mass or less of a component (A) and 10% by mass or more and 80% by mass or less of a component (B),
wherein the component (A) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 30,000 or higher and 190,000 or lower; and
the component (B) is a block copolymer having a polymer block mainly comprising a vinyl aromatic monomer unit and a polymer block mainly comprising a conjugated diene monomer unit, and having a weight-average molecular weight of 60,000 or higher and 500,000 or lower,
wherein the hydrogenation ratio of the conjugated diene monomer units in the component (A) and the component (B) is 10 to 80% by mol to the total amount of the conjugated diene monomer units of the component (A) and the component (B); and
the ratio of the weight-average molecular weight of the component (B) to the weight-average molecular weight of the component (A) is 1.3 to 10.
提供了一种嵌段共聚物组合物,其组分(A)的质量百分比为 20%或以上,质量百分比 为 90%或以下;组分(B)的质量百分比为 10%或以上,质量百分比为 80%或以下、
其中,组分(A)为嵌段共聚物,其聚合物嵌段主要由乙烯基芳香族单体单元和共轭二烯单体单元组成,重量平均分子量为 30,000 或更高,190,000 或更低;以及
组分(B)是嵌段共聚物,其聚合物嵌段主要包括乙烯基芳香族单体单元和聚合物嵌段主要包括共轭二烯单体单元,且重量平均分子量为 60,000 或以上和 500,000 或以下、
其中,组分(A)和组分(B)中共轭二烯类单体单元的氢化率为组分(A)和组分(B)中共轭二烯类单体单元总量的 10%至 80%(摩尔);以及
组分(B)的重量平均分子量与组分(A)的重量平均分子量之比为 1.3 至 10。