POLYPROPYLENE-BASED RESIN COMPOSITION FOR AUTOMOBILE PARTS, AND AUTOMOBILE EXTERIOR PARTS
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United States of America Patent
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Issued Date -
Jan 9, 2014
app pub date -
Mar 28, 2012
filing date -
Mar 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A polypropylene-based resin composition suitable for molding of especially an automobile bumper having good formability, high rigidity, excellent appearance, and high surface impact strength is provided. This composition includes: 30-62 wt. % of a propylene copolymer having an MFR of 40-70 g/10 min.; 5-20 wt. % of a propylene-based block copolymer including a crystalline polypropylene part having a high MFR and a specific ethylene-propylene copolymer part and having an MFR of 100-130 g/10 min; 10-20 wt. % of two types of ethylene-α-olefin copolymer elastomers each having a specific MFR and a specific density; and 23-30 wt. % of talc having a specific particle size.
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