Chemistry: analytical and immunological testing – Lubricant – grease – mineral oil – hydrocarbon oil product – or...
Patent
1987-03-19
1988-05-17
Marcus, Michael S.
Chemistry: analytical and immunological testing
Lubricant, grease, mineral oil, hydrocarbon oil product, or...
436 85, 436155, G01N 3328
Patent
active
047450703
ABSTRACT:
This invention relates to a method for assessing the high temperature antioxidant capabilities of engine oils, base oils and engine oil additives under oxidative conditions simulating those encountered in an operating internal combustion engine. In particular, the method of this invention evaluates the above materials under conditions of a continuous influx of free radicals or materials capable of breaking down into free radicals and at elevated temperatures, i.e., similar to engine oil operational temperatures.
REFERENCES:
patent: 4155713 (1979-05-01), Mahoney
patent: 4438203 (1984-03-01), Wohltjen et al.
The Effect of Fuel Combustion Products on Antioxidant Consumption in a Synthetic Engine Oil, L. R. Mahoney, K. Otto, S. Korcek, and M. D. Johnson, Ind. Eng. Chem. Prod. Res. Dev., 19, 11-15, (1980).
Inhibition of Oxidation by ZDTP and Ashless Antioxidants in the Presence of Hydroperoxides at 160.degree. C.-Part 1, M. D. Johnson, S. Korcek, and M. Zinbo, SAE Technical Paper 831684, 1983.
Oxidation Characteristics of Inhibited Mineral Oils, ASTM Standard Test Method D943.
Oxidation Stability of Steam Turbine Oils by Rotating Bomb, ASTM Standard Test Method D2272.
Evaluation of Automotive Crankcase Lubricants by Differential Scanning Calorimetry, S. M. Hsu, A. L. Cummings, and D. B. Clark, SAE Technical Paper 821252, 1982.
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Kinetics and Mechanisms of the Autoxidation of Pentaerythrityl Tetraheptanoate at 180.degree.-220.degree. C., E. J. Hamilton, Jr., S. Koreck, L. R. Mahoney and M. Zinbo, Int. J. Chem. Kinet., 12 577 (1980).
Johnson Milton D.
Korcek Stefan
Ford Motor Company
Marcus Michael S.
May Roger L.
Melotik Lorraine S.
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