METHOD FOR PREPARING A POLYAMIDE BY REACTIVE EXTRUSION, AND EXTRUDER ADAPTED FOR THE IMPLEMENTATION OF SUCH A METHOD

摘要

The invention concerns a method for preparing a polyamide from one or a plurality of monomers suitable for the preparation of a polyamide characterised in that the selected monomer or monomers are introduced, without any prior reaction and without any prior preparation of the corresponding salt, into an extruder comprising at least two feed screws rotating in a co-rotating manner and in that all of the steps of reaction and polycondensation, starting initially with the selected monomer or monomers, and making it possible to achieve the desired polyamide, are carried out in an extruder comprising at least two feed screws rotating in a co-rotating manner, and the polycondensation is carried out by conducting at least two operations of evacuating the by-product or by-products formed by the polycondensation reaction.