Patent ID: 6479685
Filing Date: 2002-11-12
Classification: C08F,Y10S

Abstract:
An unbridged fluxional metallocene catalyst component which exhibits plural coordination geometries for olefin polymerization,a) said fluxional catalyst having the formula: wherein M is a Group 3, 4 or 5 Transition metal, a Lanthanide or an Actinide; X and Xâ€² are the same or different uninegative ligands, L and Lâ€² are fluxional ligands, and at least one of said ligands L and Lâ€² is selected from a cyclopentadiene of the formula: wherein R2 through R8 are the same or different hydrogen, halogen, or substituted or unsubstituted alkyl, alkylsilyl, aryl, benzyl, alkoxyalkyl, alkoxyaryl, alkoxysilyl, aminoalkyl, or aminoaryl substituents, of 1 to about 30 carbon atoms, and at least one of R9 or R10 is halogen, or a substituted or unsubstituted alkyl, alkylsilyl, aryl, benzyl, alkoxyalkyl, alkoxyaryl, alkoxysilyl, aminoalkyl, or aminoaryl substituent, of 1 to about 30 carbon atoms; andb) said fluxional catalyst interconverts between states having different polymerization characteristics based on said substituents of the cyclopentadienyl ligands causing plural coordination geometries having a rate of interconversion between states within several orders of magnitude greater than the rate of formation of a single polymer chain.