Polymerization of ethylene
AssigneesE. I. Du Pont de Nemours and Company, University of North California at Chapel Hill
InventorsJordan Lawrence Bennett, Maurice S. Brookhart, III, Lynda Kaye Johnson, Christopher Moore Killian
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Abstract
Certain nickel [II] complexes of selected orthophosphine substituted arylsulfonamides or selected phosphine containing alkylsulfonamides catalyze the polymerization of ethylene. The polymers produced may be used as lubricants or in waxes. Some of these nickel [II] complexes and the phosphine containing ligands are also novel compounds.
Claims13
A process for the polymerization of ethylene, comprising, contacting, at a temperature of about -20.degree. C. to about +200.degree. C., ethylene, optionally a Lewis acid, and a compound of the formula ##STR9## wherein:
- R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or an inert functional group;
- R.sup.5 and R.sup.6 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl;
- n is 1, 2 or 3;
- Ar.sup.1 is aryl or substituted aryl;
- Ar.sup.2 and Ar.sup.3 are each independently hydrocarbyl or substituted hydrocarbyl;
- and
- L.sup.1 is a neutral monodentate ligand and L.sup.2 is a monoanionic monodentate ligand, or L.sup.1 and L.sup.2 taken together are a monoanionic bidentate ligand, provided that said monoanionic monodentate ligand or said monoanionic bidentate ligand may be displaced by said ethylene or add to said ethylene.
A process for the polymerization of ethylene, comprising contacting, at a temperature of about -20.degree. C. to about +200.degree. C., a Ni[II] complex of a monoanionic bidentate ligand of the formula ##STR10## with ethylene, and optionally a Lewis acid, wherein:
- R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl, or an inert functional group;
- R.sup.5 and R.sup.6 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl;
- n is 1, 2 or 3;
- Ar.sup.1 is aryl or substituted aryl;
- Ar.sup.2 and Ar.sup.3 are each independently hydrocarbyl or substituted hydrocarbyl;
- and provided that a Ni[II] atom also has bonded to it a ligand that may be displaced by said ethylene or add to said ethylene.
Dependencies are inferred from the claim text.