| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene resin composition showing a homogeneous viscosity at high-temperature spinning of various color compounds etc. SOLUTION: The composition comprises an antioxidant having a phosphite structure and a hindered phenol structure represented by formula (1) within a molecule and a polypropylene and satisfies relation (2): 0.80≤[(MFR<SB>P5</SB>-MFR<SB>Mi</SB>)/(MFR<SB>M5</SB>-MFR<SB>Mi</SB>)]≤1.20 (wherein MFR<SB>Mi</SB>is the melt flow rate achieved after subjecting a composition containing 0.001-1 pt.wt. antioxidant per 100 pts.wt. polypropylene to extrusion molding once; MFR<SB>M5</SB>is the melt flow rate achieved after further subjecting the composition to extrusion molding 5 times; and MFR<SB>P5</SB>is the melt flow rate achieved after compounding 0.001-5 pts.wt. pigment per 100 pts.wt. polypropylene in the composition and subjecting the composition to extrusion molding 5 times). COPYRIGHT: (C)2006,JPO&NCIPI
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