METHOD OF PRODUCING AMIDOIMIDES OF ALKENYLSUCCINIC ACID (VERSIONS) Russian patent published in 2013 - IPC C08F8/32 C08F8/46 C08F122/40 

FIELD: chemistry.

SUBSTANCE: amidoimides of alkenylsuccinic acid are produced by reacting aminoamides obtained by reacting polypropylene polyamines, selected from dipropylene triamine or tripropylene tetramine or tetrapropylene pentaamine or a mixture of polyamines or 1,2-diaminopropane, with butyric acid or isobutyric acid or oleic acid or 2-ethylhexenoic acid in molar ratio amine: acid of 1-1.15:1, with alkenylsuccinic anhydride first at temperature of 90-105°C for 1.2-1.8 hours and then at 162-165°C for 3.5-4 hours in the presence of industrial oil. Amidoimides of alkenylsuccinic acid can also be produced by reacting alkenylsuccinic anhydride with polypropylene polyamines with normal or isomeric structure, selected from dipropylene triamine or tripropylene tetramine or tetrapropylene pentaamine, or with a mixture of polyamines or with 1,2-diaminopropane in molar ratio 1:1-1.1, respectively at 140-148°C for 4-6 hours, followed by treatment of succinimide with butyric acid or isobutyric acid or oleic acid or 2-ethylhexenoic acid at 165-175°C for 6-8 hours in molar ratio succinimide: acid of 1:1, in the presence of a hydrocarbon solvent - industrial oil.

EFFECT: improved methods of producing a succinimide additive.

8 cl, 2 tbl, 34 ex