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. 23, 2011
Filed:
May. 31, 2005
Luigi Resconi, Ferrara, IT;
Friederike Morhard, Bangkok, TH;
Luigi Resconi, Ferrara, IT;
Friederike Morhard, Bangkok, TH;
Basell Poliolefine Italia, S.R.L., Milan, IT;
Abstract
A process for preparing 1-butene polymers comprising polymerizing 1-butene and optionally ethylene, propylene or higher alpha-olefin, in the presence of a catalyst system obtainable by contacting: a) metallocene compound of formula (I): wherein: M is a transition metal; p is an integer from 0 to 3; X, same or different, is a hydrogen atom, a halogen atom, or a hydrocarbon group; L is a divalent C-Chydrocarbon radical; Ris a C-Chydrocarbon radical; T, is a moiety of formula (IIa) or (IIb): wherein Rand R, are C-Chydrocarbon radicals or they can form together a C-C-membered ring; Ris C-Chydrocarbon radicals; Tand T, are a moiety of formula (IIIa) or (IIIb): wherein Rand R, equal to or different from each other, are hydrogen atoms or C-Chydrocarbon radicals; Ris a hydrogen atom or a C-Chydrocarbon radicals; with the proviso that if Tis a moiety of formula (IIa) at least one between Tand Tis a moiety of formula (IIIb), and if Tis a moiety of formula (IIb) at least one between Tand Tis a moiety of formula (IIIa); andb) at least an alumoxane or a compound able to form an alkylmetallocene cation.