Stiff and impact resistant compositions containing poly(propylene) or poly(ethylene/propylene) and calcium carbonate for closures
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United States of America Patent
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Apr 8, 2003
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N/A
app pub date -
Jul 12, 2000
filing date -
Jul 12, 2000
priority date (Note) -
Expired
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Abstract
Stiff and impact resistant closures derived from the stiff and impact resistant blends including poly(propylene) or poly(ethylene/propylene) and calcium carbonate; stiff and impact resistant compositions including poly(propylene) or poly(ethylene/propylene) and calcium carbonate. A presently preferred blend contains from about 40 to about 60 weight percent of poly(propylene) or poly(ethylene/propylene) and from about 25 to about 35 weight percent of calcium carbonate particles treated with fatty acid, the treated particles having a particle size of from about 2.5 to about 3.5 microns.
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