The present invention provides a lubricant composition which can be used as a lubricant for a rolling component, the composition capable of maintaining enhanced lubrication performance over a long period of time even under high temperature conditions such as temperatures of 180°C or higher, and a rolling bearing including the lubricant composition sealed therein. A lubricant composition-sealed bearing 1 includes a lubricant composition 7 that is sealed in the peripheries of the rolling bodies 4. The lubricant composition 7 contains a base oil and an antioxidant. The base oil is an oil mixture of an alkyl diphenyl ether oil and at least one oil selected from a poly-α-olefin oil and an ester oil, and contains the alkyl diphenyl ether oil in an amount of 50% or more by weight of the total base oil. The antioxidant is 2,2,4-trimethyl-1,2-dihydroquinoline or a polymer thereof, and is contained in an amount of 0.1% to 10% by weight of the total lubricant composition.
本发明提供了一种可用作滚动部件润滑剂的润滑剂组合物,该组合物即使在 180°C 或更高温度等高温条件下也能长期保持增强的润滑性能,还提供了一种包括密封在其中的润滑剂组合物的滚动轴承。密封润滑剂组合物的轴承 1 包括密封在滚动体 4 周围的润滑剂组合物 7。润滑剂组合物 7 包含基础油和
抗氧化剂。基础油是由烷基
二苯醚油和至少一种选自聚-α-烯烃油和
酯类油的油组成的混合物,其中烷基
二苯醚油的含量为基础油总量的 50%或以上(按重量计)。
抗氧化剂为
2,2,4-三甲基-1,2-二氢喹啉或其聚合物,其含量为总润滑油组合物重量的 0.1%至 10%。