Low base number sulphonates

摘要

The application discloses a calcium or Group 1 metal low base number sulphonate composition comprising from at least 10% by weight of at least one sulphonate prepared from neutralisation of a sulphonic acid having a number average molecular weight of 500 or greater, being an oil-soluble synthetic sulphonic acid or an alkaryl sulphonic acid; a calcium or Group 1 metal carboxylate; and diluent, wherein the composition has 0.6vol% or less of sediment, a process for its preparation and its use in lubricant compositions.