| 摘要 |
<p>A lubricating oil comprises a major amount of a base oil and a minor amount of an additive package, and the additive package comprises: hydroxyl acid represented by HOCH_2CO_2H and one or more friction modifiers including the product of reaction with amine represented by chemical formula II. In the chemical formula I, R is a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms, X is oxygen or -NH, and m is an integer of about 1 to about 4. The friction modifiers may include one more compounds represented by chemical formula I. In chemical formula I, X is selected from oxygen, -NR^1 and a glycolic amide part, R and each R^1 are selected independently from a linear or branched, saturated, unsaturated, or partially saturated hydrocarbyl having about 8 to about 22 carbon atoms, either of R and R^1 (but not both) may be hydrogen, and m is an integer of about 1 to about 4. A method for improving thin film and/or boundary layer friction is also provided.</p> |
