Thermoplastic olefin compositions and injection molded articles made thereof
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United States of America Patent
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Dec 11, 2007
Grant Date -
Jun 15, 2006
app pub date -
Dec 15, 2004
filing date -
Dec 15, 2004
priority date (Note) -
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Abstract
A thermoplastic polymer composition that exhibits substantially isotropic post injection molding shrinkage. The thermoplastic polymer composition includes a blend of highly crystalline polypropylene homopolymer, an ethylene-C.sub.4-8 .alpha.-olefin plastomer and talc having a D.sub.50 of about 2.0 .mu.m or less. The thermoplastic polymer composition exhibits post injection molding shrinkage, low temperature impact strength and tensile strength that is similar to or better than relatively expensive engineering resins and blends. The thermoplastic polymer composition according to the invention is particularly useful for forming injection molded parts for motor vehicles.
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