Bisdithiophosphoric acid derivatives as lubricant additives

摘要

There are disclosed compounds of formula I wherein R1 and R2 are each independently of the other C3-C18alkyl, C5-C12cycloalkyl, C5-C6cycloalkylmethyl, C9-C10bicycloalkylmethyl, C9-C10tricycloalkylmethyl, phenyl, C7-C24alkylphenyl or, taken together, are R3 is C2-C18alkylene which is interrupted by -O-, -S-, or -NR4-, or is a group of formula R4 is hydrogen, C1-C18alkyl, phenyl-C1-C4alkyl, phenyl or C1-C6alkyl-substituted phenyl, R5 is hydrogen or methyl. These compounds are particularly suitable for use as additives for lubricant compositions, hydraulic fluids and machining fluids.