Patents by Inventor Uli B. Holeschovsky

Uli B. Holeschovsky 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).

  • Stabilizers for polymer polyols
    Patent number: 5990232
    Abstract: Unique, well defined polyethers containing both hydroxyl-functionality and unsaturation-functionality are prepared by oxyalkylating an unsaturated monomer having at least two free carboxylic acid groups in the presence of an effective amount of a double metal cyanide complex catalyst, optionally, when necessary, in the presence of a free radical polymerization inhibitor. The resulting polyethers are eminently suitable for such uses as polymer polyol stabilizers or stabilizer precursors, and both in situ and ex situ impact modifiers for thermoplastics.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: November 23, 1999
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Jianzhong Shen, Kenneth G. McDaniel, John E. Hayes, Uli B. Holeschovsky, Harry R. Hinney
  • Stabilizers for polymer polyols
    Patent number: 5854386
    Abstract: Unique, well defined polyethers containing both hydroxyl-functionality and unsaturation-functionality are prepared by oxyalkylating an unsaturated monomer having at least one oxyalkylatable hydrogen in the presence of an effective amount of a double metal cyanide complex catalyst, optionally, when necessary, in the presence of a free radical polymerization inhibitor. The resulting polyethers are eminently suitable for such uses as polymer polyol stabilizers or stabilizer precursors, and both in situ and ex situ impact modifiers for thermoplastics.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: December 29, 1998
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Jianzhong Shen, Kenneth G. McDaniel, John E. Hayes, Uli B. Holeschovsky, Harry R. Hinney