Compositions of polypropylene and polyamide
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United States of America Patent
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Jul 22, 2008
Grant Date -
Jul 6, 2006
app pub date -
Mar 9, 2006
filing date -
Oct 10, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to thermoplastic compositions in which (A) an isotactic polypropylene, optionally containing comonomer, with a melting point of at least 110.degree. C. and (B) a polyamide, (A) and (B) constituting at least 70 wt %, are blended with (C) at least 2 wt % of a grafted functionalized propylene-based elastomer having isotactic crystallinity and containing at least 0.25 wt % of MAH-derived units based on the total weight of (C). Optionally (D) an ungrafted polyolefin may be added with a melting point of less than 100.degree. C., (C) and (D) combined being at least 8 wt % and the wt % of (A), (B), (C) and (D) being calculated on the basis of the total polymer weight of the thermoplastic composition.
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