Use of polyhydroxyalkyl monoureas for polyurethane foams, dispersions of the polyhydroxyalkyl monoureas in polyols and new tris-hydroxyalkyl monoureas

摘要

This invention relates to the use of mono- to tetrahydroxyalkyl monoureas corresponding to the following general formula in which A represents a C2-C6-alkylene group optionally containing OH-groups, n=0, 1 or 2. n'=1 or 2 and n+n'=1, 2, 3 or 4, preferably 2-4 and, more preferably, 3, as reactive flameproofing agents in quantities of from 3 to 100 parts by weight and preferably in quantities of from 11.5 to 50 parts by weight, based on 100 parts by weight of relatively high molecular weight compounds having molecular weights of from 400 to 10,000, preferably relatively high molecular weight polyols, for the production of flameproofed polyurethane foams, and preferably integral skin foams or semirigid to rigid foams. The invention also relates to dispersions or suspensions of mono- to tetrapolyhydroxyalkyl monoureas corresponding to the above formula in relatively high molecular weight compounds containing terminal hydroxyl, primary or secondary amino, carboxyl or hydrazide groups. Preferred are relatively high molecular weight polyols, having a molecular weight in the range from 400 to 10,000. The content of polyhydroxyalkyl monoureas amounts to between 3 and 50% by weight. Finally, the invention relates to tris-hydroxyalkyl monoureas corresponding to the above formula in which n=2, n'=1 and the sum of n+n'=3.