The present invention relates to functional fluid compositions containing friction modifiers, and specifically stable compositions containing friction modifiers with limited solubility in and/or limited compatibility with the functional fluids with which they are used. In particular the present invention deals with functional fluids used in internal combustion engines, such as engine oils, and friction modifiers derived from hydroxy-carboxylic acids, where the friction modifier is present in the functional fluid composition at levels that would otherwise cause the composition to be unstable and/or hazy.
本发明涉及含有摩擦改进剂的功能性流体组合物,特别是含有摩擦改进剂的稳定组合物,这些摩擦改进剂在功能性流体中的溶解度和/或与功能性流体的相容性有限。本发明尤其涉及内燃机中使用的功能性液体,如发动机油,以及由羟基
羧酸衍生的摩擦改进剂,其中摩擦改进剂在功能性液体组合物中的含量会导致组合物不稳定和/或混浊。