| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lubricant for speed change gears which has excellent oxidation stability and basic value keeping properties (long-drain properties) and excellent seizure resistance and wear preventive properties after deterioration.SOLUTION: A lubricant composition for speed change gears contains (A) 0.001-0.3 mass%, relative to the total amount of the composition and based on nitrogen element, of 2,2,6,6-tetraalkylpiperidine derivative, (B) a phenolic and/or an aromatic amine-based antioxidant and (C) a phosphite and/or a thiophosphite.</p> |
