To obtain a propylenic resin composition suitable for various kinds of industrial parts, especially automotive interiors.
This propylenic resin composition comprises (a) 100 pts.wt. of a propylene-ethylene block copolymer, (b) 1-8 pts.wt. of an ethylene.α-olefin copolymer rubber containing an α-(4-8C) olefin in an amount of 20-50 wt.% and having an MFR of 0.5-15 g/10 min, (c) 0.01-2 pts.wt. of a hindered amine compound having a mol.wt. of ≥450, (d) 0-2 pts.wt. of a nucleic acid, and (e) 0-6 pts.wt. of talc having an average particle diameter of 0.5-15 μm. The propylene-ethylene block copolymer (a) comprises 60-78 wt.% of crystalline propylene homopolymer portion and 22-40 wt.% of ethylene-propylene random copolymer portion having an ethylene content of 30-52 wt.% and a weight- average mol.wt. of 230,000-600,000, and has a total MFR of 25-40 g/10 min (230°C, 2.16 kg) and a gel number of ≤100 measured by using a 25 cm2.0.5 mm-thick molded sample and having gel sizes of ≥50 μm.
HAYAKAWA MASARU
TOMONO YOSHIHIRO
