| 摘要 |
A propylene resin composition containing a phenolic antioxidant, and a phosphorus-containing antioxidant which has a differential melt index ( DELTA MI) calculated from a melt index (MIi) as measured at a propylene temperature of 230 DEG C. and under a load of 2,160 g and a melt index (MIe) as measured at a propylene temperature of 230 DEG C. and under a load of 2,160 g after five repetitions of a 100% recycle test is not greater than 0.5 g/10 min, and MIe is not greater than 1.2 g/10 min. This propylene resin composition enables manufacture of large-sized blow-molded articles featuring light weight, excellent rigidity, dimensional stability, heat resistance and showing good drawdown resistance, suitable for continuous blow molding. Blow moldings are advantageously used as automobile bumpers, bumper beams, or like parts.
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