Mixed alkali-aluminum phosphites, method for producing same, and the use thereof
AssigneeClariant International Ltd.
InventorsHarald Bauer, Sebastian Hoerold, Martin Sicken
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Abstract
The invention relates to mixed alkali-aluminum phosphites of the formula (I) Al2.00Mz(HPO3)y(OH)vx(H2O)w (I) in which M represents alkali metal ions, z is 0.01 to 1.5, y is 2.63 to 3.5, v is 0 to 2, w is 0 to 4; to a process for preparation thereof and to the use thereof.
Claims7
A mixed alkali-aluminum phosphite of the formula (I)
- Al2.00Mz(HPO3)y(OH)vx(H2O)w (I)
- wherein
- M is alkali metal ions,
- z is 0.01 to 1.5,
- y is 2.63 to 3.5,
- v is 0 to 2, and
- w is 0 to 4,
- wherein the mixed alkali-aluminum phosphate phosphite includes
- a particle size of 0.1 to 1000 pm,
- a solubility in water of 0.01 to 10 g/l,
- a bulk density of 80 to 800 g/l, and
- a thermal stability with respect to PH3 formation of 325 to 450° C.
A synergist, a synergist in flame retardant mixtures and in flame retardants, a flame retardant for clearcoats and intumescent coatings, a flame retardant for wood and other cellulosic products, a reactive and nonreactive flame retardant for polymers, a flame-retardant polymer molding composition, a flame-retardant polymer molding or a polyester and pure and blended cellulose fabric flame- retardant produced by impregnation comprising a mixed alkali-aluminum phosphite of the formula (I)
- Al2.00Mz(HPO3)y(OH)vx(H2O)w (I)
- wherein
- M is alkali metal ions,
- Z is 0.01 to 1.5,
- y is 2.63 to 3.5,
- v is 0 to 2, and
- w is 0 to 4,
- wherein the mixed alkali-aluminum phosphate phosphite includes
- a particle size of 0.1 to 1000 μm,
- a solubility in water of 0.01 to 10 g/l,
- a bulk density of 80 to 800 g/l, and
- a thermal stability with respect to PH3 formation of 325 to 450° C.
A mixed alkali-aluminum phosphite of the formula (I)
- Al2.00Mz(HPO3)y(OH)vx(H2O)w (I)
- wherein
- M is alkali metal ions,
- z is 0.01 to 1.5,
- y is 2.63 to 3.5,
- v is 0 to 2, and
- w is 0 to 4,
- wherein the mixed alkali-aluminum phosphite includes
- a particle size of 0.1 to 1000 μm,
- a solubility in water of 0.01 to 10 g/l,
- a bulk density of 80 to 800 g/l,
- a thermal stability with respect to PH3 formation of 325 to 450° C., and
- wherein the mixed alkali-aluminum phosphite has an SO4 content of between 0.5 and 1.0% by weight.
A synergist, a synergist in flame retardant mixtures and in flame retardants, a flame retardant for clearcoats and intumescent coatings, a flame retardant for wood and other cellulosic products, a reactive and nonreactive flame retardant for polymers, a flame-retardant polymer molding composition, a flame-retardant polymer molding or a polyester and pure and blended cellulose fabric flame-retardant produced by impregnation comprising a mixed alkali-aluminum phosphite of the formula (I)
- Al2.00Mz(HPO3)y(OH)vx(H2O)w (I)
- wherein
- M is alkali metal ions,
- z is 0.01 to 1.5,
- y is 2.63 to 3.5,
- v is 0 to 2, and
- w is 0 to 4,
- wherein the mixed alkali-aluminum phosphite includes
- a particle size of 0.1 to 1000 μm,
- a solubility in water of 0.01 to 10 g/l,
- a bulk density of 80 to 800 g/l,
- a thermal stability with respect to PH3 formation of 325 to 450° C., and
- wherein the mixed alkali-aluminum phosphite has an SO4 content of between 0.5 and 1.0% by weight.
Dependencies are inferred from the claim text.