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US 6,869,904 B2Granted
Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom
AssigneeSymyx Technologies, Inc.
InventorsThomas R. Boussie, Gary M. Diamond, Christopher Goh, Anne M. LaPointe, Margaret K. Leclerc, James A. W. Shoemaker
Life of this patent
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Abstract
New ligands, compositions, metal-ligand complexes and arrays with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, propylene or styrene. The catalysts also polymerize propylene into isotactic polypropylene.
Claims22
A catalyst comprising:
- a metal complex having two seven-member metallocycles, wherein each metallocycle includes four atoms from a bis-aromatic moiety and is formed with bonds from the metal atom to at least 2 heteroatoms, and wherein said two seven-member metallocycles are joined together by at least one bridging group and wherein the metal in said metal complex is selected from the group consisting of groups 3-6 and Lanthanide elements of the Periodic Table of Elements;
- and
- one or more activators.
A catalyst, comprising:
- a metal complex characterized by the general formula:
- (4,2,O,S)MLn′
- where (4,2,O,S) is a dianionic ligand having at least 4 atoms that are oxygen or sulfur and chelating to the metal M at at least 2 coordination sites through covalent bonds from either oxygen or sulfur atoms to M;
- M is a metal selected from the group consisting of groups 3-6 and Lanthanide elements of the Periodic Table of Elements;
- each L is the same or different from the others and in each case is a moiety bonded to the metal M with a covalent, dative or ionic bond;
- and n′ is 1,2,3, or 4;
- and
- one or more activators.
5 more elements
A catalyst, comprising:
- a metal complex characterized by either of the general formulas:
- wherein at least two of the bonds to M are covalent, with the other bonds being dative;
- and each AR is an aromatic group that can be the same or different from the other AR groups with each AR being independently selected from the group consisting of optionally substituted aryl or heteroaryl;
- B is a bridging group having from one to 50 atoms not counting hydrogen atoms;
- X and X′ are the same or different and are independently selected from the group consisting of oxygen, sulfur, —NR30—, —PR30—, where R30 is selected from the group consisting of hydride, halide, and optionally substituted hydrocarbyl, heteroatom-containing hydrocarbyl, silyl, boryl, alkoxy, aryloxy, and combinations thereof;
- when the bond to M is covalent Y2 and Y3 and X4 and X5 are the same or different and are independently selected from the group consisting of oxygen, sulfur, —NR30—, and —PR30—, where R30 is defined above;
- when the bond to M is dative Y2 and Y3 and X4 and X5 are the same or different and are independently selected from the group consisting of optionally substituted amino, phosphino, hydroxy, alkoxy, aryloxy, thioxy, alkylthio and arylthio;
- M is a metal selected from groups 3-6 and Lanthanide elements of the Periodic Table of Elements, each L is a moiety that forms a covalent, dative or ionic bond with M;
- and n′ is 1,2,3 or 4;
- and
- one or more activators.
8 more elements
Dependencies are inferred from the claim text.