Metallocene compounds and their use in catalysts for the polymerization of olefins
US6268518A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1998 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Mar 30, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
It is disclosed a new class of bridged metallocene compounds of formula (I): ##STR1## wherein R.sup.1 and R.sup.2 can be hydrogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R.sup.3 and R.sup.4 form a condensed, 5- to 8-membered, aliphatic, aromatic or heterocyclic ring; M is a transition metal of groups 3, 4, 5, lanthanide or actinide; X is hydrogen, halogen, --R, --OR, --OSO.sub.2 CF.sub.3, --OCOR, --SR, --NR.sub.2 or PR.sub.2, wherein R is an hydrocarbon substituent; and p is 0-3. Furthermore, a catalyst system for olefin polymerization based on the above bridged metallocene compounds and the ligands for their preparation are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.