Metallocenes with silyl-substituted bridges and their use for olefin polymerization

US5945367A · kind A · utility

Assignee

• Borealis AG · AT

Inventors

• Karl Thiele · Peine, DE
• Christine Schliessburg · Merseburg, DE
• Eberhard Ernst · Linz, AT
• Jens Reussner · Linz, AT
• Benno Bildstein · Innsbruck, AT
• Peter Denifl · Gries am Brenner, AT

Key dates

• Filing date: Dec 22, 1997
• Grant date: Aug 31, 1999
• Expiry date: Dec 22, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention pertains to metallocenes of formula (I), wherein M is a metal group of the group of Ti, Zr, Hf, V, Nb and Ta or an element from the group of lanthanides; X.sub.1 and X.sub.2 stand for an alkyl, alkoxy, aryl, aryloxy, alkenyl, arylalkyl, alkylaryl or arylalkenyl group, hydrogen or halogen; L.sub.1 and L.sub.2 stand for a hydrocarbon which can form a sandwich structure with M; R stands for C, Si, Ge or Sn; and A and B stand for a trimethylsilyl radical, B optionally for an alkyl or aryl radical. ##STR1##