| 摘要 |
<p>This invention relates to compounds which are suitable as ash-free antiwear additives and antioxidants, to lubricant compositions comprising said compounds as well as to their use. Compounds of formulae are particularly preferred. In the preferred compounds I', R2 is isooctyloxycarbonylmethyl, R3 is isooctyloxycarbonylmethylthiomethyl and R4 is hydrogen; or R2 is tert-nonyl and R3 is tert-nonylthiomethyl and R4 is hydrogen; or R2 is isooctyloxycarbonylmethyl, R3 is hydrogen and R4 is isooctyloxycarbonylmethylthiomethyl; or R2 is tert-nonyl, R3 is hydrogen and R4 I is tert-nonylthiomethyl. In the preferred compounds II', R2 and R2' are isooctyloxycarbonylmethyl, R3 and R3' are isooctyloxycarbonylmethylthiomethyl and R4 and R4' are hydrogen; or R2 and R2' are tert-nonyl, R3 and R3' are tert-nonylthiomethyl and R4 and R4' are hydrogen; or R2 and R2' are isooctyloxycarbonylmethyl, R3 and R3' are hydrogen and R4 and R4' are isooctyloxycarbonylmethylthio; or R2 and R2' are tert-nonyl, R3 and R3' are hydrogen and R4 and R4' are tert-nonylthiomethyl.</p> |
