Patent ID: 6677441
Filing Date: 2004-01-13
Classification: C07F,C08F

Abstract:
A catalyst system for coordination polymerization comprising:(1) an activator, and (2) a Group-3 or Lanthanide metal stabilize by a monoanionic bidentate ligand and two monoanionic ligands, wherein the bidentate ligand and the metal form a metallocyclic ring comprising at least five primary atoms, where component (2) is represented by the formula: wherein, M is a Group 3 or Lanthanide metal; A is a monoanionic bidentate ancillary ligand which forms a metallocycle with at least 5 primary atoms, provided that any cyclopentadienyl group or other delocalized pi-bonded ligand in the metallocycle is counted as two primary metallocycle atoms; each Q is independently a monoanionic ligand, with the proviso that where any Q is a hydrocarbyl radical, such Q is not a substituted or unsubstituted cyclopentadienyl radical; L is a neutral Lewis base; and w is a number from 0 to 3.