Water-based hydraulic fluids

Details Water-based hydraulic fluids Water-based hydraulic fluids

1987-01-13

1989-02-21

Dixon, Jr., William R.

Compositions

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

252 75, 252 76, 252 77, 252 79, C09K 500

Patent

active

048062561

ABSTRACT:
Water-based hydraulic fluids are thickened by admixing the fluid with a viscoelastic surfactant. Viscoelastic surfactants comprise surfactant ions and organic counterions that associate with the hydraulic fluid to form the viscoelastic surfactant. Water-based hydraulic fluids of this invention are highly shear stable and do not experience substantial viscosity loss with an increase in temperature. The hydraulic fluids are capable of providing low amounts of wear in pumping apparatus during use.

REFERENCES:
patent: 3172910 (1965-03-01), Brace
patent: 3373107 (1968-03-01), Rice et al.
patent: 3661784 (1972-05-01), Bellos
patent: 3775126 (1973-11-01), Babbit et al.
patent: 4534875 (1985-08-01), Rose
Gravsholt, Journal of Coll. & Interface Sci., 57 (3), pp. 575-576 (1976), Article Entitled "Viscoelasticity in Highly Dilute Aqueous Solutions of Pure Cationic Detergents".

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