Olefin polymerization catalysts containing amine derivatives
AssigneeEquistar Chemicals, LP
InventorsSandor Nagy, Bradley P. Etherton, Ramesh Krishnamurti, John A. Tyrell
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Abstract
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 formula wherein 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.
Claims20
A catalyst which comprises:
- (a) a compound of the formula:
- wherein M is a Group 3-10 transition metal;
- A is O, S, N—R″, or P—R″;
- L is an anionic ligand;
- X is hydride, halide, C1-C20 alkoxy, siloxy, hydrocarbyl, or dialkylamido;
- R, R′, and R″, which are the same or different, are selected from the group consisting of hydrogen and C1-C20 hydrocarbyl;
- and m+n equals the valency of M minus 1;
- and
- (b) an activator.
A catalyst which comprises:
- (a) an organometallic compound of the formula:
- wherein M is a Group 4-6 transition metal;
- L is an anionic ligand;
- X is hydride, halide, methyl, phenyl, benzyl, neopentyl, or a C1-C20 alkoxy, siloxy, or dialkylamido;
- R, R′, and R″, which are the same or different, are selected from the group consisting of hydrogen and C1-C20 hydrocarbyl;
- and
- m+n equals the valency of M minus 1;
- and
- (b) an activator.
A catalyst which comprises:
- (a) a compound of the formula:
- wherein M is a Group 3-10 transition metal;
- A is O, S, N—R″, or P—R″;
- L is an anionic ligand;
- X is hydride, halide, C1-C20 alkoxy, siloxy, hydrocarbyl, or dialkylamido;
- R, R′, and R″, which are the same or different, are selected from the group consisting of hydrogen and C1-C20 hydrocarbyl;
- and
- m+n equals the valency of M minus 1;
- and
- (b) an activator.
Dependencies are inferred from the claim text.