Phosphorus-containing friction modifiers for functional fluids
AssigneeThe Lubrizol Corporation
InventorsFrederick William Koch, Jerry Lee Musser
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Abstract
Compositions prepared by the reaction of a di-(lower alkyl) phosphite with a C.sub.10.sub.-20 epoxide in the presence of a strongly alkaline reagent are useful as friction-reducing additives in functional fluids, especially automatic transmission fluids.
Claims3
A functional fluid composition comprising a major amount of a lubricating oil and a minor friction-reducing amount of the product obtained by reacting, at a temperature above about 100.degree.C. and below the decomposition temperature of the reaction mixture, and in the presence of a strongly alkaline reagent, at least one phosphorus compound of the formula ##EQU4## wherein each of R.sup.1 and R.sup.2 is a lower alkyl radical, with at least one epoxide of the formula ##EQU5## wherein R.sup.3 is an alkyl radical having 10-20 carbon atoms;
- about 1.0-1.5 moles of said epoxide being present per mole of said phosphorus compound.
Dependencies are inferred from the claim text.