SYNTHETIC HYDRAULIC FLUID Russian patent published in 2007 - IPC C10M173/02 C10M105/14 C10M145/04 C10M145/40 C10N40/08 

FIELD: special-destination fluids.

SUBSTANCE: invention relates to hydraulic fluids designed for use in various industrial equipment with transmission gears and hydraulic systems under different working conditions. Fluid according to invention contains, wt %: ethylene or propylene glycol 40-60, thickener 0.5-5.0, nonionic emulsifier 0.1-0.2, glycerol 3-6, antifoaming agent 0.01-0.3, copper-containing additive 0.1-0.3, and water (the balance), said thickener being composed of carboxymethylcellulose 30-40, polyethylene glycol 10-40, and polyvinyl alcohol to 100% and said copper-containing additive being composed of unsaturated carboxylic acid selected from C₆-C₂₂-fractions, 10-45; mixture of cuprous and cupric salts of unsaturated carboxylic acid selected from C₆-C₂₂-fractions, 2-30; tin(II) salt of unsaturated carboxylic acid selected from C₆-C₂₂-fractions, 1-20; water, 0.001-0.05; and mineral oil, to 100%.

EFFECT: reduced wear of material of friction surfaces, improved friction conditions, and widened application area.

2 cl, 3 tbl