| 摘要 |
PURPOSE:To obtain the composition, containing a propylene-based polymer, an ethylenic polymer and a specific hydrogenated conjugated diene polymer in a specified proportion, having high heat resistance and high surface hardness and excellent in impact resistance. CONSTITUTION:The objective composition is composed of (A) >=50 to <=95 pts.wt. propylene-based polymer, (B) >=2 to <=48 pts.wt. ethylenic polymer and (C) >=2 to <=48 pts.wt. polymer which is a hydrogenated polymer of a conjugated diene, expressed by the formula (R1 is H or 1-4C alkyl; R2 is 1-22C alkyl) (e.g. 1,3-butadiene) and composed of at least one block of A and B in which (i) the content of the 1,4-structure in the block A component is >=75 pts.wt.; (ii) the content of the 1,4-structure in the block B component is >=25 to <=75 pts.wt. and (iii) the difference in the weight ratio of the 1,4-structure between the block A and the block B components is >=5. |
