| abstract |
Procedure for obtaining a polyamide by reacting a dinitrile and at least one diamine with water, at a temperature of 90 to 900 ° C, a pressure of 0.1 to 50-106 and a molar ratio of water to the sum of dinitrile and diamine of at least 1: 1, in the presence of a heterogeneous catalyst, selected from the group consisting of aluminum oxide, tin oxide, silicon oxide, oxides of the second to sixth secondary group of the Periodic System, lanthanide oxides and actinides, stratified silicates, zeolites. |