Heat-resistant heterocyclic polymers and methods for producing same

摘要

A heat-resistant heterocyclic polymer consisting of units of the general formula <IMAGE> wherein R, R1 and X are as defined hereinbelow and a method for producing heat-resistant heterocyclic polymers, consisting in that, at a temperature of 90 DEG to 400 DEG C., there is conducted a reaction of polyfunctional nitrile-containing compounds with polyfunctional isocyanates. The proposed polymers are stable at temperatures from 300 DEG to 350 DEG C. Materials based thereon are capable of retaining their properties at a temperature of up to 400 DEG C. for long periods of time. The method is simple and can be effected without isolation, purification or drying the polymer, which allows combining the process of producing the polymer with that of producing a finished article.