Stabilized hydraulic fluid composition

Details Stabilized hydraulic fluid composition Stabilized hydraulic fluid composition

1978-11-27

1980-07-01

Metz, Andrew

Compositions

Electrolytes for electrical devices

252 334, 252 785, C10M 148

Patent

active

042105412

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 and a fatty acid imidazoline. For example, a hydraulic fluid containing a zinc bis(dialkyldithiophosphate) is stabilized by the presence of a minor amount of zinc dinonylnaphthalene sulfonate and a tallow fatty acid imidazoline.

REFERENCES:
patent: 2369632 (1945-02-01), Cook et al.
patent: 2710842 (1955-06-01), Heisig et al.
patent: 3390081 (1968-06-01), Floeck
patent: 3627681 (1971-12-01), Chandler
patent: 3652410 (1972-03-01), Hollinghurst et al.
patent: 3763244 (1973-10-01), Shubkin
patent: 3796662 (1974-03-01), Lyle et al.

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