Stabilization of polyphosphazene vulcanizates with a metal compl

Details Stabilization of polyphosphazene vulcanizates with a metal compl Stabilization of polyphosphazene vulcanizates with a metal compl

1978-04-28

1979-02-13

Hoke, V.P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 459R, C08K 529

Patent

active

041395239

ABSTRACT:
When polyphosphazenes are exposed to elevated temperatures, their physical properties often deteriorate. The addition of a stabilizing compound represented by the structure: ##STR1## wherein W is --CRR'-CRR'-- or ##STR2## AND WHEREIN R and R' are selected from the group consisting of hydrogen, alkyl, cycloalkyl, acyl or a mixture thereof, and M is zinc or magnesium; to polyphosphazene rubbers result in improved retention of the physical properties of such polyphosphazenes. Further, the use of additives of this type does not adversely affect the ability of peroxy compounds to cure the polyphosphazenes to form vulcanizates.
Especially useful compounds represented by the above structural formula are zinc or magnesium 1,2-bis(2-oxybenzylideneamino)ethylene.

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