Impact modifier compositions for rigid PVC compositions of hydrocarbon rubbers and chlorinated polyethylene
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United States of America Patent
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Feb 1, 2005
Grant Date -
Aug 14, 2003
app pub date -
Jan 15, 2003
filing date -
Jan 17, 2002
priority date (Note) -
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Abstract
The present invention is specifically directed to improved polyvinyl chloride compositions having excellent impact strength. In particular, the impact resistant composition comprises a vinyl chloride polymer and 2-8 parts of an impact modifier composition comprising at least one ethylene/alpha-olefin copolymer and at least one chlorinated olefin polymer per 100 parts of the vinyl chloride polymer. Preferably the impact modifier composition comprises less than 1 part of the ethylene/alpha-olefin copolymer and the ratio of said copolymer to the total modifier composition is less than 25%.
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