Patent ID: 6825297
Filing Date: 2004-11-30
Classification: C07F,C08F

Abstract:
A process for polymerizing olefins comprising contacting ethylene, one or more C3-20 &agr;-olefins, or a mixture thereof with a catalyst composition for olefin polymerization comprising:(A) a metal complex comprising a multidentate chelating ligand, said metal complex corresponding to the formula: where M is a metal from one of Groups 3 to 13 of the Periodic Table of the Elements, the lanthanides or actinides; T is nitrogen or phosphorus; RA independently each occurrence is Tâ€²RBj, RB independently each occurrence is a group having from 1 to 80 atoms not counting hydrogen, which is hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, or hydrocarbylsilyl- substituted hydrocarbyl, and the RB and RA groups bonded to the same T&boxH;C grouping are joined together to form a divalent ligand group; j is 1 or 2, and when j is 1, Tâ€² is oxygen or sulfur and when j is 2, Tâ€² is nitrogen or phosphorus, RC independently each occurrence is hydrogen or a group having from 1 to 80 atoms not counting hydrogen, which is hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, hydrocarbylamino-substituted hydrocarbyl, or hydrocarbylsilyl- substituted hydrocarbyl, or two RC groups are joined together forming a divalent ligand group; X is an anionic ligand group having up to 60 atoms (excluding ligands that are cyclic delocalized &pgr;-bound ligand groups), or two X groups together form a divalent anionic ligand group; Xâ€² independently each occurrence is a Lewis base ligand having up to 20 atoms; x is a number from 0 to 5; and xâ€² is zero, 1 or 2; and (B) an activating cocatalyst wherein the molar ratio of (A) to (B) is from 1:10,000 to 100:1.