The invention relates to environment-friendly heavy-load
gear oil and a preparation method thereof, and relates to the field of preparation of heavy-load
gear oil. The environment-friendly heavy-load
gear oil comprises a basic component and a functional additive, the basic component is prepared from the following components in percentage by
mass: 70 to 90 percent of isooctyl
stearate RJ-1651 and 10 to 30 percent of isooctyl
adipate RJ-1422; on the basis of the basic component, the functional additive comprises the following components in percentage by
mass: 0.3%-0.7% of
molybdenum dialkyl dithiophosphate (MoDTP), 1%-2% of
zinc dialkyl dithiophosphate (ZnDDP), 1.5%-2.5% of
molybdenum disulfide (MoS2) and 0.3%-0.7% of
polytetrafluoroethylene (PTFE). Through compounding of the
base oil and the synergistic effect of the four functional additives, the maximum Pb value can reach 1000N, the minimum
grinding crack
diameter is 0.412 mm, the maximum 28-day
biodegradation rate reaches 92%, animal safety tests prove that the gear oil is nontoxic, and the problems that traditional
mineral oil gear oil pollutes the environment and is insufficient in
bearing capacity are fundamentally solved.