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US 2004/0024149 A1Published application
Quasi-living metal catalyst for ethylene homo-polymerization and co-polymerization with 5-norbornen -2-yl acetate
AssigneeThe Regents of the University of California
InventorsGuillermo C. Bazan, Prasenjit Ghosh, Fumihiko Shimizu
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Abstract
Methods and compositions for the generation of quasi-living catalysts for homo-polymerization of olefins such as ethylene, α-olefins and functionalized olefins and for the co-polymerization of olefins with functionalized monomers is disclosed. A process for producing these homo- and co-polymers is also disclosed. A polymeric material with enhanced hydrophilic properties, generated by the co-polymerization of ethylene with 5-norbornen-2-yl acetate, is also disclosed.
Claims12
A process for the living and quasi-living polymerization of an olefin comprising:
- a) combining an amount of a first olefin monomer with an initiator metal compound so that a polymer chain is generated, said initiator metal compound comprising a Group VIII transition metal complex, said complex comprising a combination of any two neutral metal complexes of the general formulas (I-IV)
- 2
- wherein:
- M is a Group VIII transition metal;
- A is a π-allyl, substituted π-allyl, π-benzyl, or substituted π-benzyl;
- X is N or P;
- Y is O, CH2, or S;
- L is N or P or a structure that is capable of forming a neutral two electron donor ligand;
- L2 is a neutral monodentate ligand;
- L1 is a neutral monodentate ligand which may be displaced by the olefin, and L2 is an monoanionic monodentate ligand, or L1 and L2 taken together are a monoanionic bidentate ligand, provided that the monoanionic monodentate ligand or the monoanionic bidentate ligand may add to the olefin;
- B is an atom or group of atoms connecting covalently the carbonyl group and L;
- and
- R1, R2, R3 are each independently hydrogen, hydrocarbyl, or substituted hydrocarbyl bearing functional group;
- and
- b) combining an amount of a second olefin monomer with the polymer chain so that the second olefin monomer is added to the polymer chain.
12 more elements
A process for the living and quasi-living polymerization of an olefin comprising:
- a) combining, at a temperature of about −100° C. to about 200° C., an amount of a first olefin monomer with an initiator metal compound so that a polymer chain is generated and the amount of the first olefin monomer is depleted, said initiator metal compound comprising a Group VIII transition metal complex, said complex comprising a combination of any two neutral metal complexes of the general formulas (I-IV)
- 3
- wherein:
- M is a Group VIII transition metal;
- A is a π-allyl, substituted π-allyl, π-benzyl, or substituted π-benzyl;
- X is N or P;
- Y is O, CH2, or S;
- L is N or P or a structure that is capable of forming a neutral two electron donor ligand;
- L2 is a neutral monodentate ligand;
- L1 is a neutral monodentate ligand which may be displaced by the olefin, and L2 is an monoanionic monodentate ligand, or L1 and L2 taken together are a monoanionic bidentate ligand, provided that the monoanionic monodentate ligand or the monoanionic bidentate ligand may add to the olefin;
- B is an atom or group of atoms connecting covalently the carbonyl group and L;
- R1, R2 , and R3 are each independently hydrogen, hydrocarbyl, or substituted hydrocarbyl bearing functional group;
- and
- b) combining, at a temperature of about −100° C. to about 200° C., an amount of a second olefin monomer with the polymer chain so that the second olefin monomer is added to the polymer chain and the amount of the second olefin monomer is depleted, wherein the first and second olefin monomer is 5-norbornen-2-yl acetate or ethylene.
11 more elements
A process for the living and quasi-living polymerization an olefin comprising:
- a) combining an amount of an ethylene monomer with an initiator metal compound so that a polymer chain is generated, said initiator metal compound comprising a Group VIII transition metal complex, said complex comprising a combination of any two neutral metal complexes of the general formulas (I-IV)
- 4
- wherein:
- M is the Group VIII transition metal;
- A is a three electron donor, such as π-allyl, substituted π-allyl, π-benzyl, or substituted π-benzyl;
- X is N or P;
- Y is O, CH2, or S;
- L is N or P or a structure that is capable of forming a neutral two electron donor ligand;
- L2 is a neutral monodentate ligand;
- L1 is a neutral monodentate ligand which may be displaced by the olefin, and L2 is an monoanionic monodentate ligand, or L1 and L2 taken together are a monoanionic bidentate ligand, provided that the monoanionic monodentate ligand or the monoanionic bidentate ligand may add to the olefin;
- B is an atom or group of atoms connecting covalently the carbonyl group and L;
- R1, R2, and R3 are each independently hydrogen, hydrocarbyl, or substituted hydrocarbyl bearing functional group;
- and
- b) combining an amount of a 5-norbornen-2-yl acetate monomer with the polymer chain so that the 5-norbornen-2-yl acetate monomer is added to the polymer chain.
11 more elements
Dependencies are inferred from the claim text.