Patents by Inventor David Rosendale

David Rosendale has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5498785
    Abstract: A continuous process for the aminolysis of polymers produced from ethylenically unsaturated structural units comprising contacting, in a reaction vessel,(a) a molten polymer containing structural units produced from alpha-olefins having from 2 to 8 carbons atoms, and esters of of .alpha.,.beta.-ethylenically-unsaturated carboxylic acids in a reaction vessel; and(b) a liquid phase comprising an amine-containing compound, e.g., an alkylamine having an alkyl group containing 1-30 carbon atoms, ammonia, or derivatives thereof, in the presence of(c) a catalytically effective amount of a catalyst, which is preferably a metal-containing solution, for a period of time effective to produce a polymer containing acrylamide structural units, wherein the period of time is less than about 1 hour.This process is performed continuously in a reaction vessel, preferably in at least one reactive extruder, under conditions effective to provide an ethylene co-polymer containing acrylamide structural units.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: March 12, 1996
    Assignee: Chevron Chemical Company
    Inventors: James H. Wang, Victor P. Kurkov, Leslie P. Theard, David Rosendale