| 摘要 |
Lubricants can be stabilized against oxidation by the addition of a) a sterically hindered amine and b) a phenol of formula I <IMAGE> I wherein A, is hydrogen, alkyl, cycloalkyl, phenylalkyl, phenyl or alkylthiomethyl, B is alkyl, cycloalkyl, phenylalkyl, phenyl or alkylthiomethyl and X is hydrogen, alkyl or substituted alkyl. It is preferred to use phenols of formula I which contain a thioether group.
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