Metal catalyzed synthesis of hyperbranched ethylene and/or .alpha.-olefin polymers
Oily hyperbranched polymers derived from ethylene, propylene, butene and/or a C.sub.5 -C.sub.24 .alpha.-olefin, and a method for their synthesis, are disclosed. The polymers have non-regular microstructures and are characterized by a ratio ({character pullout})of methyl hydrogens centered around 0.85 ppm on the 1H-NMR spectra of the polymers relative to total aliphatic hydrogens of from about 0.40 to about 0.65 for polymers derived from ethylene or butene, and a ratio ({character pullout})of from greater than 0.50 to about 0.65 for polymers derived from propylene. A method for grafting hyperbranched polymers derived from ethylene, propylene, butene and/or a C.sub.5 -C.sub.24 .alpha.-olefin onto aromatic rings in organic molecules and polymers, and the resulting grafted materials, are also disclosed. The hyperbranched polymers and grafted materials are useful, for example, as lubricants and lubricant additives.
- Research Organization:
- Pennsylvania State University, University, PA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-84ER13295
- Assignee:
- The Penn State Research Foundation University Park PA (University Park, PA)
- Patent Number(s):
- 6,303,717
- Application Number:
- 09/018,048
- OSTI ID:
- 874058
- Resource Relation:
- Patent File Date: 1998 Feb 03
- Country of Publication:
- United States
- Language:
- English
[η3-methallyl-nickel-dad]PF6 complex: new catalyst precursor for ethylene polymerization
|
journal | September 1997 |
New Pd(II)- and Ni(II)-Based Catalysts for Polymerization of Ethylene and .alpha.-Olefins
|
journal | June 1995 |
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