FUNCTIONAL LIQUID COMPOSITIONS Russian patent published in 2012 - IPC C10M169/04 C10M105/04 C10M105/38 

FIELD: machine building.

SUBSTANCE: proposed composition comprises (a) 70 to 99.99 wt % of base biodegradable oil containing (i) 80 to 100 wt % of base oil or base with content of paraffins over 80 wt % and saturated hydrocarbons over 98 wt %, and containing series of isoparaffins with n, n+1, n+3 and n+4 carbon atoms, where n varies from 15 and 35, and features kinematic viscosity at 100°C lower than 3 mm²/s; and (ii) from 0 to 20 wt % polyhydroxy compound of ether; and (b) additive improving viscosity index in amount of 0.01 to 30 wt %, wherein liquid hydraulic composition features viscosity index varying from 100 to 600 and setting temperature below or equal to minus 30°C.

EFFECT: improved low-temperature properties and biodegradability.

11 cl, 4 tbl, 2 ex