Lubrication process using chlorine-free lubricant

摘要

The invention pertains to chlorine-free extreme pressure metalworking fluid additives and lies in the recognition of the improved hydrolytic stability of alkanoic acid esters of cyclohexane dimethanol and other esters embodying similar structures. The various derivatives which are effective as extreme pressure additives include those which fall within the generic description wherein R1 through R4 are independently selected from the group hydrogen and C1-24 hydrocarbyl groups and R5 and R6 are independently selected from the group C3-24 hydrocarbyl groups.