abstract |
The present invention relates to an improved lubricating composition, comprising: a major amount of a lubricating oil and a minor amount of: (a) at least one of boric acid and boron trioxide, with (b) at least one epoxide with the The following formula: (I) in which each of R1, R2, R3, and R4, is hydrogen or an aliphatic radical or any two of them together form a cyclic radical, the epoxide containing at least 8 carbon atoms. |