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CN105934445B 嵌段共聚物组合物和粘着粘结剂组合物 有权

嵌段共聚物组合物和粘着粘结剂组合物
摘要：
本发明涉及一种嵌段共聚物组合物，其中，该组合物包含10质量％以上90质量％以下的成分(a)、10质量％以上90质量％以下的成分(b)；上述成分(a)为下述嵌段共聚物，该嵌段共聚物含有以乙烯基芳香族单体单元为主体的聚合物嵌段(A)和以共轭二烯单体单元为主体的聚合物嵌段(B)，重均分子量为30,000以上150,000以下；上述成分(b)为含有以乙烯基芳香族单体单元为主体的聚合物嵌段(A)和以共轭二烯单体单元为主体的聚合物嵌段(B)的嵌段共聚物；上述成分(b)包含成分(b‑2)以及成分(b‑3)，成分(b‑2)是重均分子量相对于上述成分(a)的重均分子量之比为2.5以上且小于3.4的成分，成分(b‑3)是重均分子量相对于上述成分(a)的重均分子量之比为3.4以上且小于4.5的成分；相对于上述成分(a)和上述成分(b)的总量，上述成分(a)和上述成分(b)中的乙烯基芳香族单体单元的含量为10质量％～50质量％。
摘要（英）：

A block copolymer composition including: 10% by mass or more and 90% by mass or less of a component (a), and 10% by mass or more and 90% by mass or less of a component (b), wherein the component (a) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit, wherein the block copolymer has a weight average molecular weight of 30,000 or higher and 150,000 or lower; the component (b) is a block copolymer containing a polymer block (A) primarily including a vinyl aromatic monomer unit and a polymer block (B) primarily including a conjugated diene monomer unit; the component (b) includes a component (b-2) at a ratio of weight average molecular weight to the weight average molecular weight of the component (a) of 2.5 or more and less than 3.4, and a component (b-3) at a ratio of weight average molecular weight to the weight average molecular weight of the component (a) of 3.4 or more and less than 4.5; and the content of the vinyl aromatic monomer unit in the component (a) and the component (b) is 10 to 50% by mass based on the total amount of the component (a) and the component (b).

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