Multicomponent stabilized hydraulic fluid

Details Multicomponent stabilized hydraulic fluid Multicomponent stabilized hydraulic fluid

1978-12-01

1980-07-01

Metz, Andrew

Compositions

Electrolytes for electrical devices

252 325, 252 785, C10M 148

Patent

active

042105420

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 phosphonate 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 a sodium phosphonate and a tallow fatty acid imidazoline.

REFERENCES:
patent: 2382043 (1945-08-01), Farrington et al.
patent: 2991244 (1961-07-01), Pattenden et al.
patent: 3390081 (1968-06-01), Floeck
patent: 3763244 (1973-10-01), Shubkin
patent: 3779928 (1973-12-01), Schlicht
patent: 3819647 (1974-06-01), Foley

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