ALKALINE EARTH METAL SULPHURISED HYDROCARBYL PHENATES, THEIR PREPARATION, AND CONCENTRATES AND FINISHED LUBRICATING OILS CONTAINING THEM

摘要

A composition suitable for use as an additive to lubricating oils comprises a mixture of alkaline earth metal sulphurised hydrocarbyl phenates having hydrocarbyl substituents derived from (i) either propylene tetramer or butylene trimer and (ii) at least one alkene having greater than 12 carbon atoms. As compared with a composition comprising hydrocarbyl phenate derived from propylene tetramer or butylene trimer alone the compositions of the invention are more compatible with hydrocarbyl sulphonates, commonly found with phenates in lubricating oil additive packages.