The Lubrizol Corporation

Claire L Hollingshurst

Willis P Nichols

Elisa J Seddon

Craig D Tipton

James H Bush

James P Roski

Christopher L Friend

Mohamed G Fahmy

James J Schwind

Betsy J Butke

David M Hobson

John W Dunkerley

Stephen J Nolan

Alexander F Psaila

Paul S Greenfield

Brian R Cunningham

Carl F Kernizan

Christopher Friend

Alexandra F Psaila

A lubricant composition comprising an oil of lubricating viscosity and an oil-soluble branched-chain hydrocarbyl-substituted arenesulfonic acid salt, wherein the arenesulfonic moiety has at least one hydrocarbyl substituent which is a highly branched group as defined by having a Chi(0)/Shadow XY ratio greater than about 0.180, exhibits good dynamic frictional performance.

Highly branched sulfonates for drive-line applications

The invention provides a process for preparing a neutral or an overbased detergent, the process by: reacting (a) a pre-prepared suspension comprising (i) a metal base with a mean particle size of 10 micrometers or less; (ii) a surfactant; and (iii) an organic medium in which the metal base is suspended typically by a physical process. An overbased detergent may be formed with a further reaction with acidifying overbasing agent. The invention further provides a lubricant composition containing said neutral and overbased detergent.

Method of preparing an overbased or neutral detergent

The invention provides a composition comprising a dispersion comprising (a) an inorganic metal compound, (b) a quaternary salt surfactant and (c) an organic medium, wherein the metal compounds are uniformly dispersed in the organic medium. The invention also provides fuel compositions comprising said dispersion and methods of operating internal combustion engines and open flame burners utilizing said dispersion.

Quaternary salts for use as surfactants in dispersions

The invention provides a grease composition comprising a stable dispersion of a metal hydroxide with a number average particle size in the range 20 nanometres to 2 micrometres, a surfactant with a HLB of less than 10, a mono- or poly-carboxylic acid, and an oil of lubricating viscosity. The method of preparing a grease composition is also disclosed with benefits including a reduction in reaction time, amount of foam produced and environmental hazards.

Metal hydroxide desiccated emulsions used to prepare grease

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Belper, United Kingdom

Claire L Hollingshurst