Lubricating oil compositions containing anti-wear/extreme pressure additives.

摘要

Compounds suitable for use as EP/AW additives in lubricating oil compositions which compounds have the formula:- <CHEM> wherein X is independently either a carboxylic acid group, a carboxylic acid ester group, a hydroxyl group or the group YZ wherein Z = X and Y is either an alkylene, aralkylene or cycloalkene group, R<1> is an aliphatic hydrocarbyl group, and R<2> is either hydrogen, a hydrocarbyl group or the group YZ.