Accession Number : ADD004552

Title :   Perfluoroalkylene Ether Bibenzoxazole Polymers.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Evers,Robert C

Report Date : 20 Dec 1977

Pagination or Media Count : 7

Abstract : Perfluoroalkylene ether bibenzoxazole polymers are prepared by the polycondensation of perfluoroalkylene ether bis(o-aminophenol) compounds and perfluoroalkylene ether-imidate and -thioimidate esters synthesized by the reaction of certain perfluoroalkylene ether dinitriles with trifluoroethanol or ethanethiol. In addition to possessing high thermooxidative stability and good low temperature viscoelastic properties, the elastomeric polymers have a superior hydrolytic stability. This combination of properties renders the polymers particularly useful as seals and sealants in severe environments. (Author)

Descriptors :   *Patents, *Sealants, *Benzoxazoles, *Fluoropolymers, *Synthesis(Chemistry), *Sealing compounds, Stability, Oxidation, Thermal stability, Low temperature, Viscosity, Hydrolysis, Condensation reactions

Subject Categories : Polymer Chemistry
      Adhesives, Seals and Binders

Distribution Statement : APPROVED FOR PUBLIC RELEASE