Claims
- 1. A lubricant composition consisting essentially of a mineral oil or a synthetic oil or mixtures thereof and an effective stabilizing amount of a compound of the formula ##STR4## wherein R.sub.1 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 is methylene and A' are independently akylene of 1 to 8 carbon atoms;
- n is 0 or 1; and
- R.sub.2 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.
- 2. The lubricant composition of claim 1, wherein R.sub.1 are independently hydrogen or alkyl of 1 to 12 carbon atoms.
- 3. The lubricant composition of claim 1, wherein A' is independently ##STR5## wherein R.sub.3 is alkyl of 1 to 7 carbon atoms.
- 4. The lubricant composition of claim 1, wherein R.sub.2 is alkyl of 4 to 12 carbon atoms, phenyl or phenyl mono-, di- or trisubstituted by alkyl of 1 to 8 carbon atoms or one of said substitutents being alkoxy or thioalkyl of 1 to 12 carbon atoms.
- 5. The lubricant composition of claim 1, wherein said compound is N-(phenyliomethylene)phenothiazine.
- 6. The lubricant composition of claim 1, wherein said compound is N-(n-octylthiomethylene)phenothiazine.
Parent Case Info
This application is a continuation of application Ser. No. 315,257, filed Feb. 21, 1989, now abandoned, which is a continuation of Ser. No. 948,272, filed Dec. 31, 1986, now abandoned.
US Referenced Citations (14)
Non-Patent Literature Citations (1)
Entry |
Winthrop et al, J.A.C.S., 80, 4331-33 (1958). |
Continuations (2)
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Number |
Date |
Country |
Parent |
315257 |
Feb 1989 |
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Parent |
948272 |
Dec 1986 |
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