| 摘要 |
PURPOSE:To obtain the title composition excellent in the balance between rigidity and impact resistance, etc., by mixing a specified copolymer with an amorphous ethylene/propylene copolymer, talc, fibrous magnesium oxysulfate and a metallic soap. CONSTITUTION:0.2-0.5 pt.wt. metallic soap (E) (e.g., magnesium stearate) is mixed in melt-mixing 100 pts.wt. mixture comprising 67-79wt.% crystalline ethylene/propylene block copolymer (A) of an ethylene content of 4-10wt.%, a boiling n-heptane-insoluble content in the PP component >=95%, an intrinsic viscosity of a normal temperature p-xylene-soluble matter >=2 as measured in decalin at 135 deg.C and an MI of 3-30g/10min, 5-10wt.% amorphous ethylene/ propylene copolymer (B) of a Mooney viscosity of 20-100 at 100 deg.C, 15-20wt.% talc (C) of a mean particle diameter of 0.5-2.5mu, and 1-3wt.% fibrous magnesium oxysulfate (D) of a fiber diameter of 0.1-1.5mu and an aspect ratio of 70-150. |
