Process for the preparation of organic polyisocyanates containing biuret and/or urea groups, as well as dispersions of polyisocyanates containing urea groups in a diisocyanate free of urea

摘要

The present invention relates to a new process for the production of urea and / or biuret-containing polyisocyanates in urea and biuret-free polyisocyanates in dispersed or dissolved form by injecting at least two primary amino groups containing organic polyamines into excess polyisocyanate at -20 to 250 ° C, for which a smooth jet nozzle is used, as well as certain dispersions of urea diisocyanates in excess urea group-free diisocyanate obtainable by this process.