Patents Examined by James M. Seidleck
  • Perfluoroalkylene oxide copolymer composition containing functional groups
    Patent number: 5719259
    Abstract: Perfluoroalkylene oxide copolymer having acid fluoride moieties are prepared by reaction of hexafluoropropylene oxide and 1,2-epoxypentafluoropropane 3-fluorosulfate in the presence of a cesium alkoxide initiator. The copolymers may be cured at room temperature and are useful in sealant and coating formulations. Derivatives of the copolymers containing ester, amide, nitrile, and ether moieties are also disclosed.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: February 17, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Galina Mikhailovna Tyul'ga, Olga Borisovna Platonova, Irina Gennadievna Solodkaya, Dimetrii Stefanovich Rondarev, Yurii Kalmanovich Starobin, Sergey Vasilievich Sokolov, Albertus VanCleeff