A lubricating oil composition, an additive concentrate for lubricating oil and a method for imparting anti-corrosion properties to lubricating oil.

摘要

The invention is in the field of lubricating oils and the imparting of anti-corrosion properties thereto. Lubricating oil formulations, e.g. lubricating oil formulated for use in an engine crankcase, having improved anti-corrosion properties may be produced by the incorporation in the formulations of a minor amount of the combination of (a) a block-oxyalkylated trimethylol alkane containing an initial hydrophobic block of propyleneoxy and optionally random ethyleneoxy units and a terminal hydrophilic block of ethyleneoxy and optionally random propyleneoxy units and (b) an oxyethylated alkylphenol.