Metallocene compounds, ligands used in their preparation, preparation of 1-butene polymers and 1-butene polymers therefrom
US8003743B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2005 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Aug 24, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2420/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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 C1-C40 hydrocarbon radical; R1 is a C1-C40 hydrocarbon radical; T1, is a moiety of formula (IIa) or (IIb):wherein R2 and R3, are C1-C40 hydrocarbon radicals or they can form together a C3-C7-membered ring; R4 is C1-C40 hydrocarbon radicals; T2 and T3, are a moiety of formula (IIIa) or (IIIb):wherein R6 and R7, equal to or different from each other, are hydrogen atoms or C1-C40 hydrocarbon radicals; R5 is a hydrogen atom or a C1-C40 hydrocarbon radicals; with the proviso that if T1 is a moiety of formula (IIa) at least one between T2 and T3 is a moiety of formula (IIIb), and if T1 is a moiety of formula (IIb) at least one between T2 and T3 is a moiety of formula (IIIa); andb) at least an alumoxane or a compound able to form an alkylmetallocene cation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.