High melt flow polymer of improved durability for pipe applications
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United States of America Patent
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Mar 5, 2013
Grant Date -
Oct 21, 2010
app pub date -
Jul 1, 2010
filing date -
May 20, 2005
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Abstract
The present invention relates to a polymer composition, comprising
- (i) a polypropylene homopolymer,(ii) a polypropylene random copolymer, prepared by copolymerization of propylene with an olefin comonomer and having an amount of olefin comonomer units of 0.2 to 5 wt %, and(iii) an elastomeric copolymer of propylene and at least one olefin comonomer, the polymer composition having a tensile modulus, determined according to ISO 527-2/1B at 1 mm/min. and 23° C., of at least 1200 MPa.
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