Process to apply to products of condensacao containing phosphor and process for making flame resistant organic fibrous materials with employment of such compounds.

摘要

The subject of the invention is a process for the manufacture of water-soluble condensation products of hydroxymethyl-phosphonium compounds and dicyandiamide, characterised in that (a) 1 mol of a tetrakis-(hydroxymethyl)phosphonium compound is condensed with (b) 0.02 to 0.2 mol, preferably 0.05 to 0.15 mol, of an optionally methylolated dicyandiamide at 40 DEG to 120 DEG C, optionally in the presence of formaldehyde or a formaldehyde-donating agent, and an inert organic solvent, and optionally subsequently further condensed at temperature of 100 DEG to 150 DEG C, and if appropriate free hydroxyl groups are at least partially etherified with at least one alkanol with 1 to 4 carbon atoms and if appropriate the salts of the condensation products are converted into the corresponding hydroxides.