Phosphonitrilic mixed esters

Details Phosphonitrilic mixed esters Phosphonitrilic mixed esters

1990-12-05

1991-12-17

Lieberman, Paul

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 499, 558 80, 558157, C10M10570, C10M10574

Patent

active

050732846

ABSTRACT:
A hydraulic fluid that remains solids-free at temperatures as low as about -30.degree. C. and has a pour point as low as about -42.degree. C. comprises a cyclic phosphazene oligomer mixture, the structural formula of each molecule of which contains 3 or 4 units selected at random from the group consisting of ##STR1## wherein R is a fluoroalkoxy group --OCH.sub.2 (CF.sub.2).sub.m CF.sub.2 Z, where Z is hydrogen or fluorine, and m is 0 or an integer from 1 to 10; R' and R" are different alkoxyalkyloxy groups in which linear or branched C.sub.1-12 alkoxy is substituted with linear or branched C.sub.1-12 alkoxy; with the proviso that all of R, R' and R" are present in the oligomer mixture.

REFERENCES:
patent: 4698439 (1987-10-01), Kolich et al.
patent: 4724264 (1988-02-01), Nakacho et al.
Singler, et al., Ind. Eng. Chem. (Prod. Res. & Dev.), vol. 25, No. 1 (1986) pp. 46-57.
Lederle, et al., J. Chem & Eng. Data, vol. 11, No. 2, Apr. 1966, p. 221.
Ottmann, et al., Ind. & Eng. Chem. (Prod. Res. & Dev.), vol. 5, No. 2, Jun. 1966, p. 202.

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