申请人:Idemitsu Kosan Co., Ltd
公开号:EP3249030A1
公开(公告)日:2017-11-29
A lubricating oil composition according to one embodiment of the present invention contains an oxygen-containing synthetic base oil having an oxygen content (A) of from 15 to 40 mass% and a kinetic viscosity at 100°C of from 0.5 to 50 mm2/s, and a viscosity index improver that is an oxygen-containing compound having an oxygen content (B) of from 15 to 40 mass% and a kinetic viscosity at 100°C of 11,000 mm2/s or more, a mass ratio of the oxygen-containing synthetic base oil and the viscosity index improver being from 99.5:0.5 to 75:25, and a ratio (A/B) of the oxygen content (A) of the oxygen-containing synthetic base oil to the oxygen content (B) of the viscosity index improver being in a range of from 0.5 to 2.
根据本发明的一个实施方案,一种润滑油组合物含有含氧合成基础油,其氧含量 (A) 为 15 至 40 质量%,100°C 时的动力粘度为 0.5至50 mm2/s,以及一种粘度指数改进剂,该改进剂是一种含氧化合物,其氧含量(B)为15至40质量%,100°C时的运动粘度为11000 mm2/s或更高,含氧合成基础油和粘度指数改进剂的质量比为99.5:0.5 至 75:25,含氧合成基础油的氧含量 (A) 与粘度指数改进剂的氧含量 (B) 之比 (A/B) 在 0.5 至 2 之间。