| 摘要 |
<p>This invention relates to a lubricating oil composition, comprising: (A) a base oil and (B) a boron-containing compound represented by the formulae(RO)3-B or (RO)2-B-O-B (OR)2 (B-1) (B-II)or a cyclic trimeric structure (B-III), wherein in formulae (B-1), (B-11) and (B-111) each R is independently an organic group and any two adjacent R groups may together form a cyclic group; the lubricating oil composition containing sulfur, boron and optionally phosphorus with the ratio of sulfur to boron to phosphorus being represented by the formula S?1 + 5B1 + 3P1¿ > 0.35 wherein S1 is the concentration in percent by weight of sulfur in the composition, B1 is the concentration in percent by weight of phosphorus in the composition; the concentration of sulfur in the lubricating oil composition being from 0.01% to 0.25% by weight; the concentration of phosphorus in the lubricating oil composition being up to 0.08% by weight.</p> |
