Impact resistant polyolefin compositions
AssigneeBaselltech USA Inc.
InventorsGiuliano Cecchin, Anteo Pelliconi, Paola Sgarzi, Paolo Ferrari
Life of this patent
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Abstract
Polyolefin compositions comprising (percent by weight) A) 60%-95% of a crystalline polypropylene component having a Melt Flow Rate (MFRA) value of from 2.5 to 50 g/10 min. and containing from 20% to 80% of a fraction AI) having MFRI from 0.5 to 8 g/10 min., and from 20% to 80% of a fraction AII); B) 5%-40% of a copolymer of ethylene with one or more C4-C10 α-olefin(s) containing from 10 to 40% of said C4-C10 α-olefin(s); the ratio MFRA/MFRI being from 2 to 25; the percentages of A) and B) being referred to the sum of A) and B), and the percentages of AI) and AII) being referred to the sun of AI) and AII).
Claims10
Polyolefin compositions comprising (percent by weight):
- A) 60%-95% of a crystalline polypropylene component having a Melt Flow Rate (MFRA) value (measured at 230° C., with 2.16 Kg load) of from 2.5 to 50 g/10 min. and containing from 20% to 80% of a fraction AI) having a Melt Flow Rate (MFRI) value (measured at 230° C., with 2.16 Kg load) of from 0.5 to 8 g/10 min., and from 20% to 80% of a fraction AII);
- B) 5%-40% of a copolymer of ethylene with one or more C4-C10 α-olefin(s) containing from 10 to 40% of said C4-C10 α-olefin(s);
- said fractions AI) and AII) being independently selected from propylene homopolymers and random copolymers of propylene containing up to 15% of ethylene and/or C4-C10 α-olefin(s);
- the ratio MFRA/MFRI being from 2 to 25;
- the percentages of A) and B) being referred to the sum of A) and B), and the percentages of AI) and AII) being referred to the sum of AI) and AII).
Dependencies are inferred from the claim text.