HIGH TEMPERATURE ANTIOXIDANTS FOR SYNTHETIC BASE OILS PART VII. EVALUATION OF ANTIOXIDANTS IN SYNTHETIC FLUIDS

摘要

The object of this work is the evaluation of selected additives as antioxidants and oxidation inhibitors for non-petroleum base lubricating and hydraulic fluids in the range 400° to 700°F. The emphasis in this report is on the further examination of selected amines in methyl phenyl silicones, chlorophenyl silicones, and a tetrakis-n-dodecyl silane in the presence of aluminum, silver, copper, stainless steel and titanium. Acridines, dipyridyl amines and aryl phenylene-diamines showed considerable promise as inhibitors of increases in viscosity arising from oxidative attacks. Variations in the relative effectiveness of other amines examined do not allow the establishment of definite relationships between structure and antioxidant activity at the upper temperatures.;