Amino-substituted polymers and their use as additives for modifying the cold properties of middle hydrocarbon distillates

摘要

Polymer with a number average molecular weight of 400 to 20,000 having amino-substituted groups in its molecule and resulting from the reaction of at least one compound having a secondary amine function with 1 to 60 carbon atoms on an unsaturated polyester resulting from the condensation of an unsaturated, aliphatic dicarboxylic compound having at least one alpha ethylene unsaturation of one of the carboxylic groups on at least one epoxidized compound having 2 to 62 carbon atoms chosen from among epoxyalkenes, ethers, epoxyalcohol esters and epoxyacid esters. Middle distillate composition having a distillation range of 150 DEG to 450 DEG C. and incorporating a minor proportion, preferably 0.001 to 2% by weight, of at least one of the aforementioned polymers.