Non-flammable hydraulic fluids

Details Non-flammable hydraulic fluids Non-flammable hydraulic fluids

1983-08-03

1985-07-09

Kittle, John E.

Compositions

Heat-exchange, low-freezing or pour point, or high boiling...

Organic components

252 52A, 252 56D, 252 56R, 252 56S, 252 58, 252 73, 252 77, 252404, C09K 1520, C10M 120, C10M 126, C10M 324

Patent

active

045281092

ABSTRACT:
Non-flammable hydraulic fluids which are particularly useful for replacing existing hydraulic fluids in hydraulic systems employing acrylonitrile-butadiene rubber and Viton or PNF seals are disclosed. The non-flammable hydraulic fluids of the present invention comprise a fluorinated chlorotrifluoroethylene oil, an aliphatic ester, a liquid polyester or polyether, a hydrocarbon oil having a low wax content, and a phenolic antioxidant. The chlorotrifluoroethylene oil is present in an amount of at least about 75% by volume of the hydraulic fluid. Such hydraulic fluids are useful in applications where the flammability of existing fluids poses a significant risk of combustion or explosion due to the possibility of leakage of the fluid from the hydraulic system.

REFERENCES:
patent: 2205183 (1938-03-01), Woodhouse
patent: 2462694 (1946-10-01), Walker
patent: 2528348 (1950-10-01), Denison et al.
patent: 2550760 (1951-05-01), Bishop
patent: 2583588 (1952-01-01), Mosteller
patent: 3492233 (1970-01-01), Hepplewhite et al.
patent: 3524816 (1970-08-01), Hagemeyer et al.

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