BEDEFRGBITNL0120512EUROPEAN PATENT APPLICATIONA319841128EP8420021419840217830752219830318GB1984112819844819841003198440 6C 10L 01/18 A 6C 10L 01:22 BenA wax-containing crude oil or fuel oil comprising a pour point depressantfrUne huile brute ou huile combustible contenant de la paraffine comprenant un agent qui abaisse la température d'écoulementdeEinen Stockpunkt-Erniedriger enthaltendes paraffinhaltiges Rohöl oder HeizölSHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.Eckert, Rudolf Josef AlbrechtVos, BronBEDEFRGBITNL19841128198448

A wax-containing crude oil or a wax-containing fuel oil, in particular a wax-containing residual fuel oil, comprising a small amount of a polymer having predominantly aliphatic hydrocarbon side chains of at least 14 carbon atoms, characterized in that the polymer has a branched backbone. This polymer shows an excellent pour point depression at low concentrations.