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Metal catalyzed synthesis of hyperbranched ethylene and/or .alpha.-olefin polymers

United States Patent

6,303,717
October 16, 2001
View the Complete Patent at the US Patent & Trademark Office
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.
Sen; Ayusman (State College, PA), Kim; Jang Sub (State College, PA), Pawlow; James H. (Gainesville, FL), Murtuza; Shahid (State College, PA), Kacker; Smita (Annandale, NJ), Wojcinski, III; Louis M. (State College, PA)
The Penn State Research Foundation University Park PA (University Park, PA)
09/ 018,048
February 3, 1998
This invention was developed under grant No. DE-FG02-84ER13295 from the U.S. Department of Energy