Perfluoroalkylene ether bibenzoxazole polymers

Details Perfluoroalkylene ether bibenzoxazole polymers Perfluoroalkylene ether bibenzoxazole polymers

1976-07-30

1977-12-20

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 47R, C08G 7322

Patent

active

040641090

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.

REFERENCES:
patent: 3810874 (1974-05-01), Mitsch et al.
patent: 3846374 (1974-11-01), Evers

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