Aqueous dispersions of paraffin inhibitors

An aqueous dispersion comprising at least

• (A) a continuous aqueous phase comprising water and a water-miscible organic solvent,
• (B) a dispersed phase comprising at least one paraffin inhibitor component having a melting point of not more than 100° C., wherein the amount of the paraffin inhibitor component is from 10% to 60% by weight relating to the total of all components of the aqueous dispersion, and the paraffin inhibitor component comprises at least
• 30% to 100% by weight-relating to the total of the paraffin inhibitor component-of at least one polymeric, oil-soluble paraffin inhibitor (X),
• 0% to 70% by weight-relating to the total of the paraffin inhibitor component-of a hydrocarbon or a hydrocarbon mixture having a boiling point of at least 100° C., and
• (C) at least one surfactant (S),
• wherein
• the surfactant (S) is anionic and comprises at least one anionic group selected from sulfonate, sulfate, phosphonate or phosphate groups,
• the amount of the surfactants (S) is from 1% to 7% by weight relating to the paraffin inhibitor component, and
• the D50 particle size (volume size distribution) of the dispersed phase, measured by dynamic light scattering is from 50 nm to 500 nm,
• wherein the polymeric, oil-soluble paraffin inhibitor (X) is paraffin inhibitor (X1), wherein
• paraffin inhibitor (X1) comprises, as monomers,
• a-olefins having 10 to 60 carbon atoms, and
• monoethylenically unsaturated monomers comprising carboxylate groups, where some or all of the carboxylate groups have been reacted with aliphatic, cycloaliphatic or aromatic alcohols and/or primary amines, with the proviso that at least 50 mol % of the alcohols or primary amines are linear aliphatic alcohols or linear aliphatic amines having 16 to 32 carbon atoms;
• wherein the aqueous dispersion is stable and fluid when stored at −20° C. for a storage period of at least four weeks.