Bisdithiophosphoric acid derivatives as lubricant additives
申请人:Ciba Specialty Chemicals Corporation
公开号:US06380139B1
公开(公告)日:2002-04-30
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.