Patent ID: 9340744
Filing Date: 2016-05-17
CPC Classification: C10M,C10N

Claim Text:
1. An overbased sulphurised calcium phenate detergent additive composition made from an alkylphenol, said composition comprising a colloidal system in which a calcium carbonate core is stabilized by a sulphurised phenate surfactant in a liquid medium, and an amount of unreacted alkylphenol starting material, where more than 25 mole % of the phenolic functional groups in said unreacted alkylphenol starting material are oxyalkylated to provide oxyalkyl groups of formula —(R 1 O) n —, where R′ is ethylene, propylene or butylene and n is independently an integer from 1 to 10, by reacting said composition with ethylene carbonate, propylene carbonate or butylene carbonate; the reaction optionally taking place after any water present in said has been removed.