The Lubrizol Corporation

Michael E Huston

William R S Barton

Mark R Baker

Gary M Walker

Christopher L Friend

Gareth Brown

Mary F Salomon

James N Vinci

Roger L Sowerby

Elizabeth A Schiferl

Elisa J Seddon

Dennis M Dishong

David M Nickerson

Kevin J Hughes

Rochelle L Kovach

Charla A Ramsey

Donald J Knobloch

Denise R Vermilya

Julie A Edgar

William RS Barton

Tina M Adams

Christopher H Joniec

Elisa Seddon J

There is disclosed an antifoam component for a mechanical device which includes a fluorinated poly(acrylate) copolymer. The antifoam component has improved foam performance and thermal stability in finished fluids, such as driveline fluids.

Fluorinated polyacrylate antifoam components for lubricating compositions

The present invention relates to a lubricating composition containing an oil of lubricating viscosity and a dimercaptothiadiazole salt of a copolymer comprising units derived from monomers (i) an ?-olefin and (ii) an ethylenically unsaturated carboxylic acid or derivatives thereof (typically carboxylic acid groups or an anhydride), are partially esterified with an alcohol, or mixtures thereof, and wherein at least a portion of carboxylic acid groups not esterified are reacted with an amine. The invention further provides for a lubricating composition containing said copolymer. The invention further provides a method and use of lubricating composition in a mechanical device.

Functionalized copolymers and lubricating compositions thereof

The invention provides a method of lubricating a mechanical device by supplying a lubricating composition containing an oil of lubricating viscosity and a compound having 2 to 20 hydroxy-carboxylic acid residues. The invention further relates to the use of the compound in a driveline device to provide at least one of antiwear performance, friction modification (particularly for enhancing fuel economy).

Method of lubricating a driveline device

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Painesville, OH, United States of America

Michael E Huston