Mixed esters of polyphosphazenes

Details Mixed esters of polyphosphazenes Mixed esters of polyphosphazenes

1986-05-12

1987-10-06

Sutto, Anton H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

252 785, C07F 900

Patent

active

046984399

ABSTRACT:
A polyphosphazene hydraulic fluid that remains solids-free on storage at temperatures down to -30.degree. C. over an extended period can be made by reacting a solution of sodium phenoxide, sodium m-methylphenoxide, sodium p-methylphenoxide and sodium trifluoroethoxide with a small stoichiometric excess of cyclic phosphonitrilic chloride oligomer, mainly trimer, and then reacting the remaining replaceable chlorine atoms with a solution of sodium trifluoroethoxide.

REFERENCES:
patent: 3291865 (1966-12-01), Kober et al.
patent: 4600791 (1986-07-01), Carr et al.
patent: 4601843 (1986-07-01), Carr et al.
Lederle et al., J. Chem. & Eng. Data, vol. 11, No. 2, Apr, 1966, pp. 221-228.
Ottmann et al., Ind. & Eng. (Chem. Prod. Res. & Dev.), vol. 5, No. 2, Jun. 1966, pp. 202-204.
Singler et al, (I), "Army Science Conference Paper", A117298.
Singler, "Potential of Phosphazenes as Hydraulic Fluids", Hydraulic Fluids Meeting, NASA, Ames Research Center, Feb. 1976.
Singler et al. (II), Ind. & Eng. (Chem. Prod. Res. & Dev.), vol. 25, No. 1, 1986, pp. 46-57.

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