Elco Corporation

Donald A Lee

Philip S Korosec

John A Boslett

Extreme pressure additives are provided which are used in lubricant compositions. The extreme pressure additives of this invention are prepared by sulfurizing a mixture comprised of (a) 50-85% by weight of an ester of a higher fatty acid and glycerol, or a mono-lower-aliphatic ester of fatty acid, or mixtures thereof and (b) 50-15% by weight of a mono-alpha-unsaturated olefin having about 15-20 carbon atoms. The extreme pressure additives of this invention are especially useful in improving the high pressure characteristics of greases, gear oils, way lubricants and the like.

Extreme pressure additives for lubricants

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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Aurora, OH, United States of America

Donald A Lee