| 摘要 |
PROBLEM TO BE SOLVED: To provide a sulfur-free synthetic lubricating oil which possesses excellent abrasion resistance and, at the same time, is stable against heat and oxidation. SOLUTION: This sulfur-free lubricating oil compsn. comprises a synthetic lubricating oil as a main component, a tri(alkylphenyl) phosphate or a di(alkylphenyl) phosphate as an anti-abrasion agent, an amine antioxidant, a substd. succinamide rust preventive, and a tollyltriazole as a minor component. The oil contains about 0.1 to 2 wt.% tri(alkylphenyl) phosphate or di(alkylphenyl) phosphate as the anti-abrasion agent and about 0.1 to 5 wt.% amine antioxidant. The oil has a succinamide content of about 0.01 to 0.5 wt.% and a tollyltriazole content of about 0.01 to 0.5 wt.%. In the above description, wt.% is based on the wt. of the oil. |
