The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 2009
Filed:
Jul. 22, 2004
Roberto DE Palo, Ferrara, IT;
Paola Massari, Ferrara, IT;
Camillo Cagnani, Ferrara, IT;
Basell Poliolefine Italia s.r.l., Milan, IT;
Abstract
Articles, in particular non-pressure mono- or multi-layer pipes, prepared by extrusion, molding and combination thereof, comprising a heterophasic polyolefin composition comprising (1) 65-95% of a crystalline propylene polymer 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 value ([η]) of over 2.2 dl/g, and (2) 5-35% of an elastomeric olefin polymer of ethylene with a C-Cα-olefin having an ethylene content ranging from 15 to 85% and an intrinsic viscosity value ([η]) of at least 1.4 g/ml. The [η]/[η]ratio ranging from 0.45 to 1.6. The articles typically have modulus of elasticity in tension higher than 2000 MPa. The invention also relates to the said heterophasic polyolefin composition and an extrusion process for producing the said articles.