Polypropylene resin composition for exterior parts of automobile

Details Polypropylene resin composition for exterior parts of automobile Polypropylene resin composition for exterior parts of automobile

1996-10-08

1998-04-28

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524505, 525 88, 525 95, 525240, 525342, C08K 334

Patent

active

057445354

ABSTRACT:
A polypropylene resin composition having a high moldability and capable of forming therefrom shaped articles having excellent surface hardness, thermal deformation resistance and low temperature impact resistance includes (A) 35-74 wt % of a crystalline ethylene-propylene block copolymer with an ethylene content of 0.5-15 wt %, an isotactic pentad fractional propylene of 96% or more and a MFR of 40-80 g/10 min. (230.degree. C., 2160 g); (B) 21-40 wt % of an ethylene-.alpha.-olefin copolymer produced by using a single site catalyst and having an .alpha.-olefin content of 70 mol % or more, a ratio (Mw/Mn) of 2.5 or less, and a ratio (MI.sub.10 /MI.sub.2.16) of 6 to 15; and (C) 5-25 wt % of a talc particle component having an average particle size of 3-7 .mu.m.

REFERENCES:
patent: 4621114 (1986-11-01), Watanabe
patent: 5308908 (1994-05-01), Fukui
patent: 5391618 (1995-02-01), Yamamoto
patent: 5532309 (1996-07-01), Fukui

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