| 摘要 |
PURPOSE:To obtain a composite polypropylene composition improved in rigidity and dimensional stability, by mixing a crystalline ethylene/propylene block copolymer with an amorphous propylene/alpha-olefin random copolymer and a hydrogenated styrene/butadiene/styrene random copolymer as principal components. CONSTITUTION:80-90% total of a crystalline ethylene/propylene block copolymer (A) of a boiling n-heptane-insoluble matter in the propylene component >=95%, an ethylene content of 3-15% and an MFR of 5-40g/10min at 230 deg.C and an amorphous propylene/alpha-olefin random copolymer (B) of an MFR of 0.1-2 is mixed with 10-20% hydrogenated styrene/butadiene/styrene random copolymer (C) and at most 5wt.% talc (D) of a mean particle diameter <=3mum. |
