King Industries, Inc.

Robert L Kugel

Lawrence V Gallacher

Alfen J Gustavsen

Werner J Blank

The invention relates to the lubricating compositions containing an N-acyl-N-alkoxyalkyl aspartate ester, optionally, in further combination with an anti-wear agent. The compositions exhibit corrosion inhibition and anti-wear properties, coupled with improved demulsibility.

N-acyl-N-hydrocarbonoxyalkyl aspartic acid esters as corrosion inhibitors

A composition which is thermooxidatively stable is provided which comprises a normally thermooxidatively unstable organic compound and effective amount of a thermooxidative stabilizing composition comprising an oil soluble sulfonate of a metal selected from barium, calcium, magnesium, zinc or a mixture of any of the foregoing; an effective amount of at least one primary antioxidant; optionally an effective amount of a secondary antioxidant; and optionally a carrier for the thermooxidative stabilizing composition. A thermooxidative stabilizing composition and a method for stabilizing a normally unstable organic compound comprising the addition of an effective amount of the thermooxidative stabilizing composition are provided as well.

Thermooxidatively stable compositions

A composition which is thermooxidatively stable is provided which comprises a normally thermooxidatively unstable organic compound and effective amount of a thermooxidative stabilizing composition comprising an oil soluble sulfonate of a metal selected from barium, calcium, magnesium, zinc or a mixture of any of the foregoing; an effective amount of a stabilizer comprising an alkali or alkaline earth metal or zinc soap of an alkyl or alkenyl succinic acid, a partial ester thereof or a mixture of the foregoing; an effective amount of at least one primary antioxidant; optionally an effective amount of a secondary antioxidant; and optionally a carrier for the thermooxidative stabilizing composition. A thermooxidative stabilizing composition and a method for stabilizing a normally unstable organic compound comprising the addition of an effective amount of the thermooxidative stabilizing composition are provided as well.

A concentrate composition is disclosed which comprises (a) a blend of (i) a metal sulfonate and (ii) an alkali or alkaline earth metal or zinc salt of a carboxylic acid and (b) a carrier. The composition is useful as a rust- and corrosion-inhibitor in a petroleum or synthetic base medium and is capable of maintaining metal sulfonate content at temperatures greater than 150.degree. C., e.g., 200.degree. C., for 20 hours.

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Norwalk, CT, United States of America

Robert L Kugel