Elco Corporation

Edwin Cooper, Inc.

Philip S Korosec

Donald A Lee

Litt Fredric A

An aqueous hydraulic fluid comprising at least 80 percent water and containing a hydrocarbyl-substituted succinic acid, a zinc dihydrocarbyl dithiophosphate, a hydroxyalkylamine, sodium alkylbenzene sulfonate, and optionally, a polyalkylene glycol mono-fatty acid ester.

Hydraulic fluids

A process for preparing sulfurized oxymolybdenum organophosphorodithio compounds is described which includes the steps of (A) reacting at reflux in an inert solvent for at least one hour (1) an oxide of molybdenum, (2) a sulfurizing compound selected from the group consisting of sodium hydrosulfide and sodium monosulfide, and (3) a dialkylphosphorodithioic acid, and then (B) recovering the reaction product. Certain of these compounds have fuel efficient characteristics, as well as extreme pressure (E.P.) performance when blended into mineral oils, greases or synthetic lubricating fluids.

Process for making highly sulfurized oxymolybdenum organo compounds

Stable water-in-oil invert emulsions suitable for use as fire-resistant lubricants and as fire-resistant hydraulic fluids of improved extreme pressure (E.P.) properties are disclosed. A mixture of polyisobutenyl succinic anhydride, a member selected from the group consisting of a vegetable or animal oil or a mixture thereof, and a mono alpha-unsaturated olefin is sulfurized under heat. The sulfurized mixture is then reacted with a hydrophile on an equivalent basis. This compound is then blended with suitable base stock to form an invert emulsion with improved E.P. and anti-wear properties.

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Ballwin, MO, United States of America

Philip S Korosec