| abstract |
An additive concentrate for incorporation into wax containing petroleum fuel oil compositions to improve low temperature flow properties comprising an oil solution containing: (A) a C30-C300 oil-soluble nitrogen salt and/or amide compound wax crystal growth inhibitor formed by reaction of alicyclic C4 to C10 carboxylic acid and long chain secondary amine; (B) an organic acid to improve the solubility of (A) in the oil, which acid includes non-linear carboxylic acids including branched or unsaturated fatty acids, aromatic acids, e.g. benzoic acid, phenols, and organic phosphorus containing acids; and (C) a copolymer of ethylene and an unsaturated ester, e.g. vinyl acetate. |