Readily curable fluorocarbon ether bibenzoxazole polymers

Details Readily curable fluorocarbon ether bibenzoxazole polymers Readily curable fluorocarbon ether bibenzoxazole polymers

1977-12-21

1979-02-27

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528211, C08G 6540

Patent

active

041420373

ABSTRACT:
Thermooxidatively and hydrolytically stable perfluoroalkylene ether bibenzoxazole polymers containing hydrocarbon cure sites are synthesized by the polycondensation of a fluorocarbon bis(o-aminophenol) containing a hydrocarbon moiety and a perfluoroalkylene ether diimidate or dithioimidate ester. The polymers are readily curable to elastomers that are resistant to hydrolysis over a wide use-temperature range. Thus, the polymers are especially suitable for use in aerospace applications where extreme environments are encountered. In particular, the polymers are useful as seals, sealants, and the like.

REFERENCES:
patent: 3846376 (1974-11-01), Evers
patent: 4053498 (1977-10-01), Evers
patent: 4064109 (1977-12-01), Evers

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