Functional fluid compositions

Details Functional fluid compositions Functional fluid compositions

1973-09-24

1976-04-20

Padgett, Benjamin R.

Compositions

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

Organic components

252 498, C10M 302

Patent

active

039518370

ABSTRACT:
Novel functional fluid compositions consisting essentially of (1) a phosphate ester, e.g. dibutyl phenyl phosphate, or an amide of an acid of phosphorus, (2) a polyglycol or polyglycol ether viscosity index improver, e.g. polypropylene glycol methyl ether of molecular weight about 3,000, and (3) a small amount of a polyepoxide, e.g. an epoxy novolac of high epoxide functionality, the combination of polyglycol or polyglycol ether viscosity index improver and polyepoxide preventing acid build-up in the fluid, and preventing excessive deposits particularly when such fluid is employed as an aircraft hydraulic fluid.

REFERENCES:
patent: 3203955 (1965-08-01), Jackson et al.
patent: 3256211 (1966-06-01), Bailey, Jr. et al.
patent: 3637507 (1972-01-01), Gentit

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