STABLE DISPERSIONS OF POLYUREAS AND/OR POLYHYDRAZODICARBONAMIDES IN RELATIVELY HIGH MOLECULAR WEIGHT, HYDROXYL GROUP-CONTAINING COMPOUNDS, PROCESS FOR THE PRODUCTION THEREOF AND USE THEREOF FOR THE PRODUCTION OF POLYURETHANES

摘要

STABLE DISPERSIONS OF POLYUREAS AND/OR POLYHYDRAZODI CARBONAMIDES IN RELATIVELY HIGH MOLECULAR WEIGHT, HYDROXYL GROUP-CONTAINING COMPOUNDS, PROCESS FOR THE PRODUCTION THEREOF AND USE THEREOF FOR THE PRODUCTION OF POLYURETHANES The present invention is directed to a stable dispersion of a polyurea and/or a polyhydrazodicarbonamide having a solids content of from 5 to 40%, by weight, in a relatively high molecular weight, hydroxyl group-containing polyether, obtained by continuously reacting: (a) an organic di- and/or polyisocyanate with (b) an amine-functional material selected from the group consisting of (i) primary and/or secondary amino group-containing di- and/or polyamines, (ii) hydrazines, (iii) hydrazides and (iv) mixtures thereof in (c) said polyether at an equivalent ratio of components (a) to (b) of from 1.051:1 to 1.50:1 in a throughflow mixer in such a quantity that the average residence time of the reaction components in the mixer is less than 10 minutes and collecting the reaction product issuing from the throughflow mixer in a receiver optionally with heating to from 50 to 150.degree.C and optionally with subsequent stirring. The invention also relates to the production and use of such dispersions.