SALTS OF PHOSPHONIC ACIDS, THEIR MANUFACTURE AND THEIR USE FOR FLAME-PROOFING ORGANIC FIBERS

摘要

Novel phosphonic acid salts produced from ethane- or methanephosphonic acid, dicyandiamide and/or guanidine and optionally ammonia and corresponding to the formula +TR wherein n, p, q, t and y are each 1 or 2, are particularly suitable for fireproofing organic fibre materials. Synthetic and/or cellulose-containing fibre materials are treated with an aqueous solution of the phosphonic acid salts and are then dried preferably at 60 DEG to 200 DEG C. The applied phosphonic acid salts impair only negligibly the textile-mechanical properties of the treated fibre materials, especially of the cellulose-containing fibre materials dried at 120 DEG to 150 DEG C.