Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and preparation of polyolefins

US7109278B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Yoshikuni Okumura · Kawasaki, JP
• Markus Oberhoff · Speyer, DE
• Jorg Schottek · Frankfurt, DE
• Jorg Schulte · Frankfurt, DE

Key dates

• Filing date: Nov 26, 2002
• Grant date: Sep 19, 2006
• Expiry date: Nov 26, 2022

Classification

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

Abstract

Organometallic transition metal compounds of the formula (I) where M1 is an element of group 3, 4, 5 or 6 of the Periodic Table of the Elements or the lanthanides; X are identical or different and are each halogen, hydrogen, C1–C20-alkyl, C2–C20-alkenyl, C6–C22-aryl, alkylaryl or arylalkyl having from 1 to 10 carbon atoms in the alkyl part and from 6 to 22 carbon atoms in the aryl part, —OR5 or —NR5R6, where two radicals X may also be joined to one another or two radicals X may together form a substituted or unsubstituted diene ligand, in particular a 1,3-diene ligand; where R5 and R6 are each C1–C10-alkyl, C6–C15-aryl, alkylaryl, arylalkyl, fluoroalkyl or fluoroaryl each having from 1 to 10 carbon atoms in the alkyl radical and from 6 to 22 carbon atoms in the aryl radical; n is a natural number from 1 to 4 which is equal to the oxidation number of M1 minus 2; R1 is a C2–C40 radical which is branched in the α position; R2 is hydrogen or a C1–C40 radical which may be branched or unbranched in the α position; R3, R3a and R3b are identical or different and are each hydrogen or a C1–C40 radical, where at least one of the radicals R3, R3a, R3b is not hydrogen; R4 is a substituted or un…