Phosphorus-contaning flame-retardant compositions
AssigneePerachem Limited
InventorsPaul Webb, David Malcolm Lewis, Jamie Anthony Hawkes, Andrew Edward Bayliff
Life of this patent
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Abstract
Flame-retardant composition containing a first component selected from phosphorous acid or a salt of phosphorous acid and a second component selected from an isocyanic acid, an isocyanic acid precursor, a cyanate salt, a thiocyanate salt or isothiocyanic acid precursor, dicyandiamide, cyanamide or carbodiimide precursor.
Claims7
A wash durable flame-retardant composition comprising 5 to 20 wt % phosphorous acid, 1 to 40 wt % potassium cyanate, 1 to 30 wt % ammonium hydroxide, 0.1 to 5 wt % ethylene glycol, and water wherein the composition has a pH of between 8 and 11.
A wash durable flame-retardant composition comprising 5 to 20 wt % phosphorous acid, 1 to 40 wt % potassium cyanate, 1 to 30 wt % ammonium hydroxide, 0.1 to 5 wt % ethylene glycol, and water.
A method of providing a wash durable flame-retardant finish to a material, the method comprising:
- a) applying to the material a composition comprising a first component selected from phosphorous acid or a salt of phosphorous acid;
- and
- b) applying to the material a composition comprising a second component of potassium cyanate;
- and
- c) curing the material;
- in which during step c) the pH of the composition to the material fall;
- and wherein the composition comprising 5 to 20 wt % phosphorous acid, 1 to 40 wt % potassium cyanate, 1 to 30 wt % ammonium hydroxide, 0.1 to 5 wt % ethylene glycol, and water.
Dependencies are inferred from the claim text.