Abstract:

Hydraulic fluids based on water-in-oil microemulsions and non-ionic emulsifiers were prepd. Phase diagrams of the microemulsions were constructed with the intention of using the most suitable of them for formulation of hydraulic fluid with and without additives. Up to 22 wt.% water could be solubilized when a carefully designed mixt. of nonionic ethoxylated alcs. was used as the surfactant; up to nearly 35 wt.% water could be solubilized when a mixt. of paraffinic oil and pentanol was used as the oil phase and the same mixt. of nonionic ethoxylated alcs. was used as the surfactant. Droplet size, stability, and other phys. characteristics were evaluated. [on SciFinder(R)]