Polypropylene composition

Details Polypropylene composition Polypropylene composition

1989-11-20

1991-09-03

Michl, Paul R.

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...

525 88, 525 89, C08K 5300

Patent

active

050455893

ABSTRACT:
The present invention relates to a polypropylene composition comprising a crystalline ethylene-propylene block copolymer having an ethylene content of 5-20% by weight and a melt flow index of 11-90, a thermoplastic elastomer, an amorphous propylene-.alpha.-olefin random copolymer having a number-average molecular weight of 1,000-20,000 and a propylene content of 40-95% by weight and an inorganic filler. This composition can be made into a molded article having no flow mark on the surface. The molded article is superior in rigidity, heat deformation resistance, low temperature impact resistance and coatability, has appearance free from waviness, voids, etc., and is suitable for use particularly in high quality bumper for automobiles.

REFERENCES:
patent: 4621114 (1986-11-01), Watanabe
patent: 4687804 (1987-08-01), Shiraishi
patent: 4737536 (1988-04-01), Kawase

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