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US 12,163,056 B2Granted
Compositions comprising ammonium polyphosphates
AssigneeClariant International Ltd.
InventorsAndreas Termath, Andrea Zurstrassen-Gassen
Life of this patent
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Abstract
The invention relates to compositions comprising as component (A) 0.1% to 99.9% by weight of phase II ammonium polyphosphate and as component (B) 0.1% to 99.9% by weight of phase I and/or phase III, IV, V and/or VI ammonium polyphosphate, where the sum total of the components is 100% by weight, and to the use thereof in intumescent coatings.
Claims14
A composition comprising
- as component (A) 65% to 92% by weight of phase II ammonium polyphosphate and
- as component (B) 8% to 35% by weight of phase I ammonium polyphosphate,
- where the sum total of the components is 100% by weight, and
- wherein the composition has:
- a residual moisture content of less than 0.5%, measured according to ISO 760,
- a bulk density of 0.3 to 0.9 g/cm3,
- a water solubility of less than 1.5%, measured as a 10% suspension in water at 25° C.,
- a viscosity of less than 40 mPas, measured by Brookfield DV3T, speed 50 rpm, spindle 1,
- a particle size d50 of 5 to 50 μm, measured by laser diffraction,
- a particle size d90 of 10 to 60 μm, measured by laser diffraction, and
- a pH of 4 to 8, measured as a 10% suspension in water at 25° C.
8 more elements
Dependencies are inferred from the claim text.