Hydraulic fluid composition for power steering containing a phos

Details Hydraulic fluid composition for power steering containing a phos Hydraulic fluid composition for power steering containing a phos

1990-02-09

1992-03-10

Willis, Jr., Prince

Compositions

Electrolytes for electrical devices

252 785, 252 77, 252 71, C10M13536, C10M13712, C10M13714

Patent

active

050947630

ABSTRACT:
A hydraulic fluid composition for power steering is disclosed, which comprises (a) at least one phosphorus containing compound selected from the group of alkyl, or alkyl substituted or unsubstituted phenyl phosphorus acid compounds, alkyl, or alkyl substituted or unsubstituted phenyl phosphorus thioacid compounds, alkyl, or alkyl substituted or unsubstituted phenyl phosphorus dithioacid compounds, and (b) one or more thiadizaole derivatives represented by the formula: ##STR1## where R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1 to 12 carbons. The composition enables hydraulic systems to be used for longer times without accelerating deterioration of rubber materials employed in the hydraulic system.

REFERENCES:
patent: 3879306 (1975-04-01), Kablaoui et al.
patent: 3901932 (1975-08-01), Tada et al.
patent: 3923669 (1975-12-01), Newingham et al.
patent: 3980573 (1976-09-01), Okorodudu
patent: 4661273 (1987-04-01), Frangatos et al.

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