Impact-modified polymers (p-1304)
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United States of America Patent
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Nov 19, 1991
Issued Date -
N/A
app pub date -
Dec 21, 1990
filing date -
Jul 15, 1988
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Expired
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Abstract
Impact-modified polymeric materials are produced by visbreaking certain reactor blends. In a preferred embodiment, impact-modified polypropylene materials are produced by visbreaking a reactor blend of polypropylene and thermoplastic polyethylene. The polypropylene material is preferably homopolypropylene having a melt flow rate of less than about 1 dg/min. Such impact-modified polymeric materials manifest unexpected compatibility characteristics, increased impact resistance at low temperatures, improved antiblush characteristics and improved flow characteristics.
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