| abstract |
Substituted 1-aminonaphthalenes of formula I ##STR1## wherein n is 1-3, Ar is arylene, R 1 and R 2 are independently hydrogen, alkyl or phenyl, R 3 is hydrogen, alkyl or substituted alkyl, and R 4 and R 5 have independently the same definitions as R 3 or are independently aryl, substituted aryl or cycloalkyl, are effective stabilizers for lubricating oil or polymer compositions. The instant compounds are particularly effective in lubricating oil compositions when used with a diarylamine antioxidant. |