Compositions for the Flame-Inhibiting Finishing of Fiber Materials

An aqueous composition preparable by the following successive process steps

• a) Preparation of a mixture of water and guanidine phosphate, the quantitative ratios being chosen such that the mixture has a phosphorus content in the range from 4.0 to 6.5% by weight.
• b) Optional adjustment of the pH of the mixture to a value in the range from 4.5 to 6.5 at 20° C.
• c) Addition of ammonium sulfamate or amidosulfonic acid in an amount such that, per 100 g of the mixture obtained after step b), 8 to 12 g of amidosulfonic acid or 9.5 to 15 g of ammonium sulfamate are used, or addition of a mixture of these two products.
• d) Optional adjustment of the pH of the resulting mixture to a value in the range from 4.5 to 6.5 at 20° C.
• e) Addition of ammonium sulfate in an amount such that, per 100 g of the mixture obtained after step d), 20 to 40 g of ammonium sulfate are used.