Process for producing polyacrylonitrile spinning solutions having stable viscosity

摘要

A gentle manner for producing solutions, having stable viscosity, of acrylonitrile (co)polymers having solids concentrations of 20-38% by weight comprises admixing 0.01-1% by weight, based on the solution, of an amine having a pKB < 7, heating this mixture in the course of 0.5-5 hours to 50-100 DEG C, then, if required, adding 0.25 to 2 times the equivalent amount of an amine acceptor and waiting at least 0.1-1 hour prior to processing the solution.