Metal catalyst for olefin polymerization and co-polymerization with functional monomers
AssigneeThe Regents of the University of California
InventorsGuillermo C. Bazan, Prasenjit Ghosh
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Abstract
A catalyst is disclosed for the polymerization and co-polymerization of olefins with functionalized monomers. The catalyst is formed from a combination of two neutral metal complexes, L(iPr2)M(CH2Ph)(PMe3)[L=N-(2,6-diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] and M(COD)2(COD=cyclooctadiene). The catalyst displays a unique mode of action and performs at ambient conditions producing high molecular weight polyolefins and co-polymers with functional groups. The polymerized olefins include ethylene, α-olefins and functionalized olefins.
Claims16
A catalyst for the polymerization and co-polymerization of an olefin, said catalyst comprising any combination of two neutral metal complexes of the general formula I, II, III, or IV:
- 2
- wherein:
- M is Ni, Pt, or Pd;
- A is a π-allyl, a substituted π-allyl, a π-benzyl or a 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 capable of being displaced by said olefin, L2 is a monoanionic monodentate ligand, or L1 and L2 taken together are a monoanionic bidentate ligand, provided that said monoanionic monodentate ligand or said monoanionic bidentate ligand is capable of adding to said olefin;
- B is an atom or group of atoms connecting covalently the carbonyl group and L;
- and
- R1, R2, and R3 are each independently hydrogen, hydrocarbyl, or substituted hydrocarbyl bearing functional group.
A process for the polymerization and co-polymerization of an olefin, comprising:
- polymerizing an olefin selected from the group consisting of a compound of the formula R5CH═CH2, wherein R5 is hydrogen;
- hydrocarbyl group;
- substituted hydrocarbyl bearing functional group;
- cyclopentene;
- styrene;
- norbornene;
- a polar olefin;
- substituted cyclopentene;
- substituted styrene;
- or substituted norbornene derivative bearing fimctional group, or a combination thereof;
- and
- conducting said polymerizing in the presence of a catalyst, said catalyst comprising a combination of two neutral metal compounds.
A method for producing an olefin, comprising:
- polymerizing and co-polymerizing the olefin in the presence of a catalyst, the catalyst comprising any combination of two neutral metal compounds of the general formula I, II, III, or IV:
- 3
- wherein:
- M is Ni, Pt, Pd;
- A is a π-allyl, a substituted π-allyl, a π-benzyl or a 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 capable of being displaced by said olefin, L2 is an monoanionic monodentate ligand, or L1 and L2 taken together are a monoanionic bidentate ligand, provided that said monoanionic monodentate ligand or said monoanionic bidentate ligand is capable of adding to said olefin;
- B is a bridge connecting covalently a carbonyl group and L;
- and
- R1 to R3 are the same or different and are each independently hydrogen, hydrocarbyl group, or substituted hydrocarbyl bearing functional group.
Dependencies are inferred from the claim text.