| 摘要 |
<p>To provide a block copolymer composition that is ideal for various types of packaging materials, including food containers , beverage containers , industrial containers , and blister packs , in that it has excellent transparency ,luster , strength, rigidity, and moldability; excellent anti- blocking and anti- stacking performances; and excellent property balance in terms of the above- mentioned properties when used after adding a vinyl aromatic hydrocarbon -based polymer., [Solution] A block copolymer composition of a vinyl aromatic hydrocarbon and a conjugated diene , wherein the conjugated diene content of the block copolymer component (I) having a molecular weight peak within a molecular weight range of 150, 000 to 300, 000 and a tapered block is 10 to 20 mass% , the conjugated diene content of the block copolymer component (II) having a molecular weight peak within a molecular weight range of 50, 000 to 140, 000 and a tapered block is 30 to 50 mass% , and the molecular weight peak surface area ratio (I)/(II) of the block copolymer component (I) and block copolymer component (II) in the block copolymer composition is 20/80 to 80/20.</p> |
