The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 2007
Filed:
May. 14, 2002
Simon Michael Green, Egham, GB;
Peter James Maddox, Staines, GB;
Simon Michael Green, Egham, GB;
Peter James Maddox, Staines, GB;
BP Chemicals Limited, London, GB;
Abstract
A complex of transition metal Ti, Fe, Co, Ni, Cr, Mn, Ta, Rh, Y, Sc, Ru, Pd, Zr, Hf, V or Nb and a mono-, bi-, tri-, or tetra-dentate ligand, wherein at least one of the donor atoms of the ligand is a nitrogen atom N with a 5-membered heterocyclic substituent joined to the N by a carbon atom. The complex is preferably formula (I) wherein R—N-G-Xis a bi-, tri, or tetra-dentate ligand, N is joined to G by an imine linkage; G is a bridging group which can contain a third or fourth donor atom; Xis —O or —S if the X-M bond is covalent, or if the X-M bond is dative Xis ═S, —PRR, —PRR, ═NR, ═NR, —NRRor —NRR; Rand Rare 5-membered heterocyclic substituents joined to the nitrogen (or phosphorus) atoms via a carbon atom: Rand Rare hydrocarbyl or heterohydrocarbyl, substituted hydrocarbyl or aryl substituent; X represents an atom or group covalently or ionically bonded to the transition metal M; L is a group datively bound to M, and n is from 0 to 5; q is 1 or 2. The complexes find use as polymerization catalysis, preferably with an activator, e.g. MAO