Lubricants which can be used for the polyvinyl chloride preparation according to the invention comprise any of the conventional lubricants for the processing of plastics, preferably hydrocarbons, and particularly preferably oils, paraffins and PE waxes, fatty alcohols having from 6 to 20 carbon atoms, ketones, carboxylic acids, preferably fatty acids or montanic acids, oxidized PE wax, metal salts