PROCESS FOR THE CONTINUOUS PRODUCTION OF POLYISOCYANATES

摘要

A process for the continuous production of a polyisocyanate involving feeding a diisocyanate and an adduct containing at least one active hydrogen atom into a mixing zone, reacting the feedstocks to produce a polyisocyanate in an inclined coiled tubular reactor, having a reactor height/length ratio of from 2 to 50% and a L/D (length/diameter) ratio of from 10 to 1000 and cooling the reaction product.