Succinic anhydride promoter overbased magnesium sulfonates and oils containing same
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United States of America Patent
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Mar 3, 1987
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N/A
app pub date -
Apr 11, 1985
filing date -
Apr 11, 1985
priority date (Note) -
Expired
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Abstract
An engine or lubricating oil containing 0.03 to 0.3% by weight of a succinic anhydride promoter reaction product for a overbased magnesium sulfonate, based on the presence of 0.5% by weight of Mg metal in the oil, and wherein the weight of the reaction product is commensurately proportional to the weight of Mg metal in the oil, and which oil is a free of post sulfonate formation water-tolerance additives, nevertheless passes the rigorous Cummins water tolerance test. Copromoters such as a naphthenic acid and/or a salicylic acid may be employed.
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