Accession Number : ADD005647

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 : 19 Sep 1978

Pagination or Media Count : 7

Abstract : Thermooxidatively and hydrolytically stable perfluoroalkylene ether bibenzoxazole polymers having improved viscoelastic properties are synthesized by the polycondensation of perfluoroalkylene ether bis(o-aminophenol) compounds with thioimidate esters derived primarily from tetrafluoroethylene oxide but end-capped with hexafluoropropylene oxide. Based on their lower glass transition temperature, the polymers have a very broad use temperature range which renders them particularly useful under severe environmental conditions encountered in aerospace elastomer applications such as seals and sealants. (Author)

Descriptors :   *Patents, *Polymers, *Benzoxazoles, *Fluoropolymers, *Synthesis(Chemistry), Fluorine compounds, Thermal stability, Oxidation resistance, Hydrolysis, Viscoelasticity, Ethers, Esters, Alkenes, Seals(Stoppers), Sealing compounds

Subject Categories : Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE