| 摘要 |
PROBLEM TO BE SOLVED: To obtain a resin composition which can give an injection molding excellent in rigidity, surface hardness, and impact resistance by mixing a propylene block copolymer with a propylene homopolymer or random copolymer, a specified ethylene copolymer composition, a scaly inorganic filler, and microparticulate silica. SOLUTION: This composition comprises 10-94 pts.wt. propylene block copolymer; 0-70 pts.wt. propylene homopolymer or random copolymer; 5-30 pts.wt. ethylene copolymer composition obtained by melt-blending the following five components: (1) 100 pts.wt. ethylene polymer having an MFR of 0.01-50 g/10 min and satisfying the relationship: Tc>1,920d-1,620 (wherein Tc( deg.C) is the temperature at which the maximum peak stands in a thermogram as determined with a differential scanning calorimeter, and d (g/cm3) is the density, (2) 5-20 pts.wt. inorganic microparticles surface-modified with vinylsilane, (3) 0.01-1 pt.wt. crosslinking agent, (4) 0.01-1 pt.wt. crosslinking aid, and (5) 0-5 pts.wt. uncleator; 0-20 pts.wt. scaly inorganic filler; and 1-25 pts.wt. microparticulate silica. |
