Patents by Inventor Joseph A. Kotrola

Joseph A. Kotrola 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).

  • Process for the preparation of sterically hindered nitroxyl ethers
    Patent number: 8481726
    Abstract: The present invention relates to a novel process for the preparation of specific sterically hindered nitroxyl ethers from their corresponding sterically hindered nitroxyl radicals by reacting it with an aldehyde and a hydroperoxide. This nitroxyl ether formation may be carried out from different starting nitroxyl radicals, which are subsequently further reacted to the desired compounds. The compounds prepared by this process are effective as stabilizers for polymers against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: July 9, 2013
    Assignee: BASF SE
    Inventors: Abdel-Ilah Basbas, Davide Alvisi, Robert Cordova, Michael Peter Difazio, Walter Fischer, Joseph A. Kotrola, Tiziano Nocentini, James Robbins, Kai-Uwe Schöning
  • Process for the preparation of sterically hindered nitroxyl ethers
    Publication number: 20110160453
    Abstract: The present invention relates to a novel process for the preparation of specific sterically hindered nitroxyl ethers from their corresponding sterically hindered nitroxyl radicals by reacting it with an aldehyde and a hydroperoxide. This nitroxyl ether formation may be carried out from different starting nitroxyl radicals, which are subsequently further reacted to the desired compounds. The compounds prepared by this process are effective as stabilizers for polymers against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.
    Type: Application
    Filed: June 25, 2007
    Publication date: June 30, 2011
    Inventors: Abdel-Ilah Basbas, Davide Alvisi, Robert Cordova, Michael Peter Difazio, Walter Fischer, Joseph A. Kotrola, Tiziano Nocentini, James Robbins, Kai-Uwe Schöning