| 摘要 |
The invention to a lubricant composition for gears. According to the invention, the composition comprises 90.5 ... 94.8 % mineral oil fractions, solvented and hydrofinished, and having a cinematic viscosity coefficient ranging between 50 ... 530 cSt at 40 degree C, a flow point of at most -5 degree C, a viscosity index of at least 75 ; 1 ... 3 % additive of the polymethacrylate type improving the viscosity index ; 3 ... 6 % multifunctional dispersant additive having antioxidant, antirust, anticorrosion, antiwear effects, under extreme pressure conditions, and having a content of 27.5 ... 32 % sulphur, 2 ... 2.5 phosphorus, 8 ... 8.5 zinc and 1.5 ... 2.5 % nitrogen ; 0.2 ... 0.5 depressant additive of the polymethacrylate type and 0.005 ... 0.002 % antifoaming additive of the polymethyl siloxane type, the percentage being expressed by weight.
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