| 摘要 |
PROBLEM TO BE SOLVED: To provide a cheap polypropylene composition excellent in various physical properties, moldability, and molded appearance without needing the post-addition of a large amount of a rubber component. SOLUTION: This composition contains (A) a polypropylene component obtained by the continuous multi-step polymerization of (AI) crystalline polypropylene having an MFR (melt flowrate) of 0.5-10 g/10 min, (AII) crystalline polypropylene having an MFR of 30-2,000 g/10 min, and (AIII) an ethylene- propylene copolymer having an ethylene content of 10-70 mass% and an intrinsic viscosity of 4-9 dl/g, (B) a polypropylene component obtained by the continuous multi-step polymerization of (BI) crystalline polypropylene having an MFR of 30200 g/10 min, (BII) an ethylene-propylene copolymer having an ethylene content of 30-70 mass% and an intrinsic viscosity of 2-4 dl/g, and (BIII) an ethylene-butene copolymer having an ethylene content of 70-80 mass% and an intrinsic viscosity of 2-3 dl/g, (C) a polypropylene component having an MFR of 500-3,000 g/10 min, and an inorganic filler having an average particle size of 4μm or lower. COPYRIGHT: (C)2004,JPO
|
