LUBRICANT COMPOSITIONS FOR TRANSMISSIONS Russian patent published in 2014 - IPC C10M169/04 C10N20/02 C10N20/04 C10N30/06 C10N40/04 

FIELD: machine building.

SUBSTANCE: invention relates to a lubricant composition for a gear box with kinematic viscosity at 100°C, making from 5.5 to 7 mm²/s, containing one or several phosphorus-containing, sulphur-containing or sulphur and phosphorus containing additives, which increase wear resistance, and/or additives for limit pressure, at least one methyl ether of fatty acid with formula RCOOCH₃, where R is paraffin or olefin group containing from 11 to 23 atoms of carbon, and either at least one compound selected from the group of heavy poly-alpha-olefins with kinematic viscosity at 100°C, measured in accordance with the standard ASTM D445, making from 300 to 1200 mm²/s, and with molecular weight from 4000 to 50000 Da, or at least one compound selected from the group of light poly-alpha-olegin with kinematic viscosity at 100°C, making from 1.5 to 3 mm²/s, with kinematic viscosity at 40°C, making from 4 to 6 mm²/s, and with molecular weight of less than 500 Da in combination with one or several compounds, such as polymethacrylates with molecular weight of less than 30000 Da, and where the ratio of mass percentage content of polymethacrylate (polymethacrylates) and mass percentage content of ether (ethers) of fatty acid makes from 0.8 to 1.2. Also this invention relates to application of a lubricant composition for gear boxes and to application of bases that are methyl ethers of fatty acid as a lubricant base.

EFFECT: production of compositions for transmissions making it possible to considerably save fuel.

22 cl, 9 tbl, 2 dwg, 8 ex