Process for preparing clay-based grease compositions

Details Process for preparing clay-based grease compositions Process for preparing clay-based grease compositions

C - Chemistry, Metallurgy

10

M

253/18

C10M 113/16 (2006.01)

Patent

CA 1081203

A B S T R A C T A process for preparing a grease composition which comprises: a. forming a clay hydrogel of clay of sufficient ion exchange capacity and water; b. intimately mixing therewith a conjugate acid surfactant formed from an acid and an organic amine compound; c. intimately mixing with the mixture formed in (b) a major proportion of lubricating oil whereby a water phase and a pre-grease phase comprising curds of oil, clay, surfactant and minor amounts of water are formed; d. separating the water phase from the wet pre-grease phase; e. adding to this wet pre-grease a minor proportion of a poly- epoxide; f. dehydrating the pre-grease and simultaneously reacting the poly- epoxide with the unoccupied amine groups of the amine; g. subjecting the resulting pre-grease to a shearing action sufficient to form a grease structure. The resulting grease compositions show an improved water resistance and mild extreme pressure properties as well as an improved response to certain additives.

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