Polymerization catalysts, preparation of polyolefins, organotransition metal compounds and ligands

• US 7,589,223 B2
• Filed: 09/16/2004
• Issued: 09/15/2009
• Est. Priority Date: 09/25/2003
• Status: Expired due to Fees

• Current Assignee: Basell Polyolefine GmbH (Lyondellbasell Industries NV)
• Original Assignee: Basell Polyolefine GmbH (Lyondellbasell Industries NV)
• Inventors: Krajete, Alexander, Bildstein, Benno
• Primary Examiner(s): LU, C CAIXIA
• Application Number:
  US10/573,228
• Publication Number:
  US 20070004884A1
• Time in Patent Office: 1,825 Days
• Field of Search: 556/32, 556/138
• US Class Current: 556/32
• CPC Class Codes: C07F 15/045 without a metal-carbon linkage
• CPC Class Codes: C08F 10/00 Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08F 110/02 Ethene
• CPC Class Codes: C08F 4/7006 NN

Abstract

The invention relates to non-metallocene catalyst systems useful for preparing olefin homopolymers or copolymers. The catalyst systems comprise a cocatalyst and a Group 3-10 transition metal compound that incorporates a diimine ligand in which sp²-hybridized carbons of the imine groups are joined by a specific divalent one- or two-membered bridge (Y) comprising nitrogen and/or oxygen. The invention includes the diimine ligands, the transition metal compounds, the catalyst systems, and processes for making the ligands, transition metal compounds, catalyst systems, and olefin homopolymers or copolymers.

Claims

1. A transition metal compound of the formula (I)

2. A process for preparing a transition metal compound, which comprises reacting a transition metal compound with a ligand system of the formula (II)