Fuel additives comprising a colloidal metal compound.

摘要

An additive composition comprises at least one colloidal metal compound or metallic species and a stabilising component, wherein the stabilising component comprises the product obtainable by the condensation reaction between: (i) at least one aldehyde or ketone or reactive equivalent thereof, and (ii) at least one compound comprising one or more aromatic moieties bearing at least one hydroxyl group and at least one further substituent chosen from a hydrocarbyl group, -COOR 1 or COR 1 , wherein R 1 represents hydrogen or a hydrocarbyl group. The composition may further include at least one lubricity enhancer.