Polypropylene bumper cover composition

Details Polypropylene bumper cover composition Polypropylene bumper cover composition

1996-08-02

1998-06-09

Warzel, Mark L.

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...

525240, C08L 2310

Patent

active

057635200

ABSTRACT:
This invention relates to a polypropylene bumper cover composition, particularly to a polypropylene bumper cover composition with improved contraction rate, painting properties, and molding properties. This composition includes 55 to 70 wt % of a polypropylene resin, 28 to 45 wt % of an ethylene-propylene rubber component, 2 to 5 wt % of an inorganic filler, 1 to 2.5 wt % of high density polyethylene, and 2.5 to 7 wt % of oxidation inhibitor, lubricant and carbon black. The ethylene-propylene rubber component may include two ethylene-propylene rubbers having different Mooney viscosities. The inorganic filler can be talc or fine talc.

REFERENCES:
patent: 5001182 (1991-03-01), Maruya et al.

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