abstract |
THE INVENTION PROVIDES LUBRICATING COMPOSITIONS CONTAINING OIL-SOLUBLE PRODUCTS MADE BY HEATING N-PHENYLNAPHTHYLAMINE, N - NAPHTHYL - NAPHTHYLAMINE, MIXTURES THEREOF, OR MIXTURES THEREOF WITH DIPHENYLAMINE, IN THE PRESENCE OF AN OXIDIZING AGENT. THE PRODUCTS IMPART IMPROVED ANTIOXIDANT PROPERTIES TO SAID LUBRICATING COMPOSITIONS. |