Polypropylene resin composition
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United States of America Patent
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Mar 6, 2012
Grant Date -
Jul 12, 2007
app pub date -
May 10, 2004
filing date -
May 8, 2003
priority date (Note) -
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Abstract
A polymer blend includes a first random copolymer of propylene and one or more C2-C20 α-olefins other than propylene having a melting point of above 116° C. and up to about 145° C. and which constitutes from about 60 weight percent to about 95 weight percent of the composition, and a second random copolymer of propylene and one or more C2-C20 α-olefins other than propylene having a melting point of from about 70° C. to no more than 116° C. and which constitutes from about 5 weight percent to about 40 weight percent of the composition. The polymer blend includes a xylene soluble fraction having a weight average molecular weight of above about 100 kg/mol and an intrinsic viscosity of above about 1.0 dl/g.
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