| abstract |
Additive compositions are described which, added to various cutsnrefined petroleum products, such as middle petroleum distillates,nimprove lubricity.n n n These compositions comprise at least one partial ester formed betweennat least one polyol and at least one aliphatic monocarboxylic acid from 4 ton24 carbon atoms, said partial ester most often consisting of atnminus a mono or a diglyceride.n n n The compositions of middle petroleum distillates are also described.ncontaining these additives, for example at a content of 20 to 2000 ppm andnpreferably from 75 to 200 pppm by mass. |