FIELD: wear prevention agents. SUBSTANCE: additive improving performance characteristics of lubrication materials and fuels is 1,1- dihydroperfluoropolyalkyloxa-β- ketosulfonic acid of general formula [RFC(O)CH2SO2O]nM, in which RF represents 
; m=1-3; M is Li, Na, K, Rb, or Cs with n=1; M is Zn or Cu with n=3; and M is Al or In with n=3. EFFECT: reduced wear of friction pairs up to complete safety effect and doubled resource of machines and mechanisms. 21 ex
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