摘要 |
A single-site olefin polymerization catalyst is described. The catalyst comprises an activator and an organometallic compound that includes an amine derivative ligand. The catalyst is highly productive, incorporates comonomers well, and gives polymers with narrow molecular weight distributions. The compound is of the formulawherein M is a group 3-10 metal;A is O, S, N-R'' or P-R'';L is cyclopentadienyl, boraaryl, pyrrolyl, azaboralinyl, quinolinyl, or pyridinyl, or is another RR'N-A- or RR'C=N-A' group;X is a hydride, halide, alkoxy, siloxy, hydrocarbyl or amido;R,R' and R'' are hydrogen or hydrocarbyl;m+n equals the valence of M minus 1.
|