| US 7,572,860 B2 | ||
| Polyolefin articles | ||
| Roberto De Palo, Ferrara (Italy); Paola Massari, Ferrara (Italy); and Camillo Cagnani, Ferrara (Italy) | ||
| Assigned to Basell Poliolefine Italia s.r.l., Milan (Italy) | ||
| Appl. No. 10/567,192 PCT Filed Jul. 22, 2004, PCT No. PCT/EP2004/008252 § 371(c)(1), (2), (4) Date Feb. 03, 2006, PCT Pub. No. WO2005/014713, PCT Pub. Date Feb. 17, 2005. |
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| Claims priority of provisional application 60/497830, filed on Aug. 26, 2003. | ||
| Claims priority of application No. 03017824 (EP), filed on Aug. 05, 2003. | ||
| Prior Publication US 2007/0117932 A1, May 24, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C08L 23/00 (2006.01); C08L 23/04 (2006.01); C08L 23/10 (2006.01); C08L 23/16 (2006.01); C08L 9/00 (2006.01) | ||
| U.S. Cl. 525—191 [525/232; 525/240] | 10 Claims |
| 1. Articles prepared by extrusion, moulding and combinations thereof, comprising a heterophasic polyolefin composition comprising
(percent by weight):
(1) 65-95% of a crystalline propylene homopolymer, said crystalline propylene homopolymer being insoluble in xylene at ambient
temperature in an amount over 85% and having a polydispersity index ranging from 4 to 13 and an intrinsic viscosity ([η])
value of over 2.2 dl/g; and
(2) 5-35% of an elastomeric olefin polymer of ethylene with a C3-C10 α-olefin and optionally a diene, having an ethylene content ranging from 15 to 85% and an intrinsic viscosity ([η]) value
of at least 1.4 g/ml;
wherein a ratio of the intrinsic viscosity value of the crystalline propylene homopolymer (1) to that of elastomeric olefin
polymer (2) ranges from 0.45 to 1.6.
|