| abstract |
Compounds of formulae I and Ia <IMAGE> wherein R1 and R2 are each independently of the other C1-C13alkyl which may be interrupted by oxygen, C5-C6cycloalkyl or, together with the linking N-atom, are a group of formula <IMAGE> R is hydrogen or methyl, R3 is hydrogen or C1-13alkyl, and R4 and R5 are each independently of the other hydrogen, C1-C18alkyl which may be interrupted by oxygen, C5-C6cycloalkyl or, together with the linking N-atom, are a group of formula <IMAGE> with the proviso that R3, R4 and R5 are not simultaneously hydrogen and HNR1R2 are not identical with NR3R4R5, are suitable for use as lubricant additives. |