Stabilized hydraulic fluid

Details Stabilized hydraulic fluid Stabilized hydraulic fluid

1978-11-03

1979-12-18

Vaughn, Irving

Compositions

Electrolytes for electrical devices

252 33, 252 75, 252400R, C10M 148, C10M 140, C10M 342, C10M 334

Patent

active

041793897

ABSTRACT:
Mineral oil or synthetic hydrocarbon base hydraulic fluids containing a zinc bis(dialkyldithiophosphate) as an antiwear agent are stabilized against degradation at elevated operating temperatures by the incorporation in the hydraulic fluid of an appropriate Group I or Group II metal dialkylnaphthalene sulfonate. For example, a hydraulic fluid containing a zinc bis(dialkyldithiophosphate) is stabilized by the presence of a minor amount of zinc dinonylnaphthalene sulfonate.

REFERENCES:
patent: 3451930 (1969-06-01), Mead
patent: 3523082 (1970-08-01), Vienna et al.
patent: 3627681 (1971-12-01), Chandler

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