Stabilization of polyfluorophosphazenes with zinc hippurate

Details Stabilization of polyfluorophosphazenes with zinc hippurate Stabilization of polyfluorophosphazenes with zinc hippurate

1977-02-23

1977-09-27

Hoke, V. P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08K 509

Patent

active

040511030

ABSTRACT:
When polyphosphazenes are exposed to elevated temperatures, their physical properties deteriorate. The addition of zinc bis hippurate to polyphosphazene rubbers has been found to result in improved retention of the physical properties of polyphosphazenes. Further the use of such an additive does not adversely affect the ability of peroxy compounds to cure the polyphosphazenes to form vulcanizates.

REFERENCES:
patent: 3843596 (1974-10-01), Kyker et al.
patent: 3867341 (1975-02-01), Kyker et al.
patent: 3945966 (1976-03-01), Vicic et al.
patent: 4017456 (1977-04-01), Lohr
Development of Thermally Stable Polyfluoroalkoxy Phosphazene Transmission Seals for the UH-1 Helicopter - Reynard (Sept. 1973) NTIS Publication, U.S. Dept. Commerce.
Polymer Engineering and Science -May 1975, vol, 15, No. 5, pp. 321 to 338.
Development Compounding & Evaluation of Phosphazene Rubber for Helicopter Seal Applications - Wilson (Oct. 1974) - U.S. Army Natick Laboratories Technical Report, Natick, Mass.
Phosphonitrilic Chemistry-Allcock, Apr. 22, 1968, Chemistry and Engineering Journal, pp. 68 to 81.

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