Process for the preparation of nylon 4,6.

摘要

Improved process for the preparation of white, high molecular weight, poly(tetramethylene-adipamide) in which by controlling the reaction conditions of the prepolymerization step only a very low degree of polymerization of the prepolymer is obtained, resulting in a shorter aftercondensation time to obtain a high molecular weight final polycondensation polymer product in a substantially reproducible manner.