The Lubrizol Corporation

Ross L Beebe

Richard Yodice

John R Johnson

James J Schwind

Anthony J Brzytwa

Christopher D Hilker

The present invention provides a low cost technique for synthesizing substituted trithiocarbonates and derivates thereof, by a one-step process which does not require solvent washes or re-crystallization steps, and results in practical yields more than double that of processes disclosed in the prior art.

Process for making substituted trithiocarbonate derivatives

This invention relates to a lubricating composition comprising a major amount of an oil of lubricating viscosity, (A) at least one organic polysulfide comprising at least about 90% dihydrocarbyl trisulfide, from about 0.1% up to about 8% dihydrocarbyl disulfide, and less than about 5% dihydrocarbyl higher polysulfides, and (B) at least one overbased metal composition, at least one phosphorus or boron compound, or mixtures of two or more thereof. The invention also relates to concentrates and greases containing the above combination. The invention also relates to methods of making the organic polysulfide.

Lubricating compositions, concentrates, and greases containing the combination of an organic polysulfide and an overbased composition or a phosphorus or boron compound

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Mentor, OH, United States of America

Ross L Beebe