Patents Examined by Celia Chag
  • 2,6-diarylpiperidin-1-yl substituted 2-butene stabilizers
    Patent number: 5290940
    Abstract: 2,6-Diarylpiperidin-1-yl substituted 2-butene stabilizers of the formula I or IIT--CH.sub.2 --CH.dbd.CH--CH.sub.2 --T (I)T--CH.sub.2 --CH.dbd.CH--CH.sub.2 --N(E.sub.1)(E.sub.2) (II)where T is a 2,6-diarylpiperidin-1-yl moiety and E.sub.1 and E.sub.2 are independently alkyl, cycloalkyl, aralkyl or aryl, are effective in stabilizing organic materials against the deleterious effects of oxygen, heat and actinic radiation.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: March 1, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Glen T. Cunkle, Joseph E. Babiarz