Modified isoplanares a method with an increased density

摘要

Lubricating and functional fluid compositions are described which comprise at least one oil of lubricating viscosity and an extreme- pressure and friction-modifying amount ofPP(A) at least one phosphite ester characterized by the formula ##STR1## wherein R.sup.1 is a straight-chain hydrocarbyl group and R.sup.2 is a branched-chain hydrocarbyl group. The invention also relates to compositions which comprise the combination of such phosphite esters as represented by Formula I and various sulfur-containing compositions. The compositions comprising said combinations also are useful in lubricating and functional fluid compositions including lubricating oils and greases. Aqueous systems containing the phosphite esters represented by Formula I as well as combinations of phosphite esters with sulfur-containing compositions also are described.