Patents by Inventor Diane A. Macarevich

Diane A. Macarevich 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).

  • Preparation of polyesters from polyethers by an ester-insertion process
    Patent number: 5319006
    Abstract: Polyesters are prepared by a new ester-insertion reaction of a polyether and a cyclic anhydride in the presence of a Lewis acid catalyst. The process is advantageously used to convert polyether polyols recovered from polyurethanes into curable unsaturated polyester resins.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: June 7, 1994
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Lau S. Yang, Diane A. Macarevich
  • Preparation of glycol diesters from polyethers
    Patent number: 5254723
    Abstract: A process for making glycol diesters from polyethers is disclosed. The polyether is reacted with an acyclic, aliphatic anhydride in the presence of a Lewis acid to produce the glycol diester. The invention provides a way to reuse polyether polyols recovered from polyurethanes by converting them to readily purified glycol diesters. The diesters are useful as solvents and as chemical intermediates.
    Type: Grant
    Filed: November 23, 1992
    Date of Patent: October 19, 1993
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Lau S. Yang, Diane A. Macarevich
  • Hydrolysis of polyurethanes
    Patent number: 5208379
    Abstract: Waste or scrap polyurethane may be conveniently and economically converted to useful active-hydrogen containing polyethers and polyamines by contacting the polyurethane with water, strong base, and an activating agent such as a quaternary ammonium compound containing at least 15 carbon atoms or an organic sulfonate containing at least 7 carbon atoms. The activating agent helps to accelerate the rate of base catalyzed hydrolysis.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: May 4, 1993
    Assignee: Arco Chemical Technology, L.P.
    Inventors: Lau S. Yang, Diane A. Macarevich