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:
May. 04, 2004
Filed:
Sep. 18, 2001
Luigi Resconi, Ferrara, IT;
Simona Guidotti, Casalecchio di Reno, IT;
Giovanni Baruzzi, Ferrara, IT;
Cristiano Grandini, Massafiscaglia, IT;
Ilya E. Nifant'ev, Moscow, RU;
Igor A. Kashulin, Moscow, RU;
Pavel V. Ivchenko, Moscow, RU;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
A process for producing substantially amorphous propylene (co)polymers, comprising contacting propylene optionally in the presence of one or more olefins under polymerization conditions with a catalyst system comprising: A) a half sandwich titanium complex wherein the cyclopentadienyl is substituted with one or two heterocyclic rings, according to formula (I): cf formula (I) in claim 1: wherein X is N or P; Z is C, Si or Ge; Y is an atom selected from the group consisting of NR , O, PR or S; Y is selected from the group consisting of CR or Y and m is 0 or 1 and B) an activating cocatalyst. The above titanium complex and the ligand useful as intermediates in their synthesis are also described.