| abstract |
Process for the continuous production of aliphatic or semi-aromatic polyamide oligomers, wherein a) an aqueous composition containing at least one component suitable for polyamide formation, which is selected from dicarboxylic acids, diamines, salts of al less a dicarboxylic acid and at least one diamine, lactams, amino-amino acids, nitriles of aminocarboxylic acids and mixtures thereof, and the composition made available is conducted to an oligomerization zone, b) the composition provided in step ( a) it is subjected to an oligomerization in the oligomerization zone, without exchanging substances with the environment, at a temperature of 170 to 290 ° C and an absolute pressure of at least 20 bar, and c) from the oligomerization zone a discharge is extracted that Contains polyamide oligomers. |