Method for improving extreme pressure, antiwear and stability properties of industrial, hydraulic and gear oils.

摘要

A lubricant oil composition having balanced antiwear/extreme pressure and stability properties while providing friction reduction which comprises: (1) a major amount of a lubricating oil basestock; and (2) a minor amount of an amine phosphate salt of the formula: IMAGE (I) where R1 is C9 to C22, R2 and R3 are each independently C1 to C4 hydrocarbyl, R4 is c10 to c20 hydrocarbyl, and R5 is hydrogen to c10 to c20 hydrocarbyl; wherein the amine phosphate salt is soluble in the lubricant oil basestock at 25C, is a liquid at 25C, and the ratio of gram-atomic-equivalents of amine to phosphate in said salt is from about 1.0 to 1.2.