| 摘要 |
Lubricants stabilized against oxidative degradation by the incorporation therein of N-thioalkylenephenothiazine derivatives corresponding to the formula <CHEM> wherein R1 are independently hydrogen, alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 7 carbon atoms or aralkyl of 7 to 9 carbon atoms; A and A' are independently alkylene of 1 to 8 carbon atoms; n is 0 or 1; and R2 is alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 7 carbon atoms, said cycloalkyl substituted by alkyl of 1 to 18 carbon atoms, phenyl, phenyl substituted by alkyl, alkoxy or thioalkyl to a total carbon atom content of 7 to 30, naphthyl or naphthyl substituted by alkyl, alkoxy or thioalkyl to a total carbon atom content of 11 to 40, as well as certain phenothiazines within the indicated group.
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