To provide a polypropylene-based composite resin composition which hardly causes the defective phenomena of surface formation defect, even when a molding cycle in injection molding is shortened.
This crystalline polypropylene resin composition comprises 1 to 80 wt.% of the following component (A), 5 to 95 wt.% of the component (B), 0 to 30 wt.% of the component (C) and 0 to 30 wt.% of the component (D). The component (A): crystalline polypropylene component having an MFR of 10 to 200 g/10 min, and a Q value of ≤5; the component (B): a propylenic polymer component having an MFR of 0.01 to 100 g/10 min, a Q value of 3.5 to 10.5, a rate of components having mol.wt. of ≥2,000,000 in a mol.wt. distribution curve in a range of 0.4 to 10 wt.%, a dissolution component of ≤3.0 wt.% in TREF at a temperature of ≤40°C, an isotactic triad fraction (mm) of ≥95%, and a distortion cure extent of ≥6.0 on elongation viscosity measurement; the component (C): a thermoplastic elastomer; and the component (D): an inorganic filler.
COPYRIGHT: (C)2010,JPO&INPIT
UCHINO HIDEFUMI
ITO MASAAKI
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