Polypropylene resin composition
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Oct 24, 1994
filing date -
Nov 1, 1993
priority date (Note) -
Expired
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Abstract
A polypropylene resin composition, which exhibits an excellent coating adherence, high rigidity, high impact strength at low temperatures, prominent heat resistance and excellent appearance of moldings even without effecting a treatment with trichloroethane as a pretreatment step before coating, comprises 30 to 92% by weight crystalline ethylene propylene block copolymer (A), 5 to 30% by weight ethylene-.alpha. olefin copolymer rubber (B), 3 to 20% by weight ethylene-butene-1 copolymer (C) having the following characteristics: (C1) a density of 0.870 to 0.915 g/cm.sup.3, (C2) a melt index at 190.degree. C. of 5 to 30 g/10 minutes, and (C3) a melt peak at 100.degree. C. or higher as determined in the thermogram with increasing temperature by a Differential Scanning Calorimeter (DSC), and 0 to 20% by weight inorganic filler (D).
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