Hydraulic oil

Details Hydraulic oil Hydraulic oil

1993-01-22

1994-11-01

Pal, Asok

Compositions

Electrolytes for electrical devices

252 486, 252 52R, 252 781, C10M14522

Patent

active

053605659

ABSTRACT:
An improved anti-wear, high pressure hydraulic oil which contains essentially no zinc or phosphorous is described. The hydraulic oil protects against corrosion and oxidation as well as provides anti-wear, anti-weld, and demulsibility properties. This improved hydraulic oil contains (1) petroleum hydrocarbon oil; (2) esters of dibasic and monobasic acids; (3) butylated phenol; (4) phenol; (5) sulfurized fatty oil; (6) fatty acid; and (7) sulfur scavenger. This hydraulic oil has a reduced tendency towards sludge formation and has, therefore, an increased lifetime. This hydraulic oil can be used in applications requiring good boundary lubrication and minimal sludge formation. It is especially useful in high pressure hydraulic systems and pumps.

REFERENCES:
patent: 5032300 (1991-07-01), O'Neil
Development of an Extended-Life Hydraulic Fluid, by Mitsuo Okada & Masatada Yamashita, pp. 1-8, 1985.

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