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:
Mar. 12, 2002
Filed:
Mar. 30, 2000
Montech USA Inc., Wilmington, DE (US);
Abstract
A process for the preparation of heterophasic polyolefin compositions by (i) polymerizing to form (a) a crystalline propylene or ethylene polymer, and (b) an elastomeric copolymer of ethylene and a C -C &agr;-olefin, wherein the polymerizations are carried out in the presence of a Ziegler-Natta catalyst, (ii) contacting the polymer obtained in (i) with: (a) a compound capable of deactivating the catalyst present in (i), and (b) a catalyst (2) obtained by contacting (I) a compound containing a transition metal M, and at least one ligand coordinated with the metal M by a &pgr; bond, and (II) a cocatalyst, and (iii) copolymerizing ethylene and a C -C &agr;-olefin in the presence of the polymer treated as in (ii), and the catalyst (2).