Mixtures of flame protection means containing flame protection means and aluminium phosphites, method for production and use thereof

1. A flame retardant mixture comprising at least one flame retardant and aluminum phosphites wherein the aluminum phosphites are selected from the group consisting of the formulae (II), (III) and mixtures thereof

Al 2.00 M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

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,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

u is 2 to 2.99,

t is 2 to 0,01 and

s is 0 to 4,

mixtures of aluminum phosphite of the formula (III) with aluminum salts.

2. The flame retardant mixture as claimed in claim 1 , wherein the at least one flame retardant is dialkylphosphinic acids, salts thereof; condensation products of melamine, reaction products of melamine with phosphoric acid, reaction products of condensation products of melamine with polyphosphoric acid or mixtures thereof; nitrogen-containing phosphates of the formulae (NH 4 ) y H 3-y PO 4 and (NH 4 PO 3 ) z , where y is 1 to 3 and z is 1 to 10 000; benzoguanamine, tris(hydroxyethyl) isocyanurate, allantoin, glycoluril, melamine, melamine cyanurate, dicyandiamide, guanidine; magnesium oxide, calcium oxide, aluminum oxide, zinc oxide, manganese oxide, tin oxide, aluminum hydroxide, boehmite, dihydrotalcite, hydrocalumite, magnesium hydroxide, calcium hydroxide, zinc hydroxide, tin oxide hydrate, manganese hydroxide, zinc borate, basic zinc silicate, zinc stannate or mixtures thereof.

3. The flame retardant mixture as claimed in claim 1 , wherein the at least one flame retardant is dialkylphosphinic acids or salts thereof and are of the formula (IV)

wherein

R 1 , R 2 are the same or different and are linear or branched C 1 -C 6 -alkyl;

M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H a protonated nitrogen base or mixtures thereof;

m is 1 to 4.

4. The flame retardant mixture as claimed in claim 1 , wherein the at least one flame retardant is melam, melem, melon, dimelamine pyrophosphate, melamine polyphosphate, melam polyphosphate, melon polyphosphate, melem polyphosphate and mixed poly salts thereof, ammonium hydrogenphosphate, ammonium dihydrogenphosphate, ammonium polyphosphate or mixtures thereof.

5. The flame retardant mixture as claimed in claim 1 , wherein the at least one flame retardant is selected from the group consisting of aluminum hypophosphite, zinc hypophosphite, calcium hypophosphite, sodium phosphite, monophenylphosphinic acid and salts thereof, mixtures of dialkylphosphinic acids and salts thereof, rnonoalkylphosphinic acids and salts thereof, 2-carboxyethylalkylphosphinic acid and salts thereof, 2-carboxyethylmethylphosphinic acid and salts thereof, 2-carboxyethylarylphosphinic acid and salts thereof, 2-carboxyethylphenylphosphinic acid and salts thereof, oxa-10-phosphaphenanthrene (DOPO) and salts thereof, adducts onto para-benzoquinone, itaconic acid and salts thereof.

6. The flame retardant mixture as claimed in claim 1 , wherein z in the aluminum phosphite of the formula (II) is 0.15 to 0.4, y is 2.80 to 3, v is 0.1 to 0.4 and w is 0.01 to 0.1.

7. The flame retardant mixture as claimed in claim 1 , wherein u in the aluminum phosphite of the formula (III) is 2.834 to 2.99, t is 0.332 to 0.03 and s is 0.01 to 0.1.

8. The flame retardant mixture as claimed in claim 1 , comprising 0.1 to 99.9% by weight of the flame retardant and 0.1 to 99.9% by weight of aluminum phosphites of the formulae (II) (III) and mixtures thereof, mixtures of aluminum phosphite of the formula (III) with aluminum salts or mixtures thereof.

9. The flame retardant mixture as claimed in claim 1 , comprising 50 to 99.9% by weight of flame retardant and 0.1 to 50% by weight of aluminum phosphites of the formulae (II), (III) and mixtures thereof, mixtures of aluminum phosphite of the formula (III) with aluminum salts or mixtures thereof.

10. A process for preparing flame retardant mixtures comprising aluminum phosphites selected from the group consisting of the formulae (II), (III) and mixtures thereof

Al2.00M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

wherein

M is alkali metal ions

z is 0.01 to 1.5

y 2.63 to 3.5

v is 0 to 2 and

w is 0 to 4,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

u is 2 to 2.99,

t is 2 to 0.01 and

s is 0 to 4,

comprising the step of mixing pulverulent flame retardants with pulverulent aluminum phosphites of the formulae (II), (III) and mixtures thereof, mixtures of aluminum phosphite of the formula (III) with aluminum salts or mixtures thereof.

11. An intermediate for further syntheses, a binder, a crosslinker or accelerator in the curing of epoxy resins, polyurethanes, unsaturated polyester resins, polymer stabilizer, a crop protection composition, a sequestrant, a mineral oil additive, an anticorrosive, a washing composition a cleaning composition or an electronic composition comprising a flame retardant mixture comprising a flame retardant and aluminum phosphites wherein the aluminum phosphites are selected from the group consisting of the formulae (II), (III) and mixtures thereof

Al 2.00 M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

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,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

u is 2 to 2.99,

is 2 to 0.01 and

s is 0 to 4,

mixtures of aluminum phosphite of the formula (III) with aluminum salts.

12. A flame retardant, a flame retardant for clearcoats and intumescent coatings, a flame retardant for wood and other cellulosic products, a reactive and nonreactive flame retardants for polymers, a flame-retardant polymer molding composition, a flame-retardant for rendering polyester and pure and blended cellulose fabrics flame-retardant by impregnation, a synergist or a synergist in further flame retardant mixtures comprising a flame retardant mixture comprising a flame retardant and aluminum phosphites

wherein the aluminum phosphites are selected from the group consisting of the formulae (I) (II), (III) and mixtures thereof

Al 2.00 M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

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,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

u is 2 to 2.99,

t is 2 to 0.01 and

s is 0 to 4,

mixtures of aluminum phosphite of the formula (III) with aluminum salts.

13. A flame-retardant thermoplastic or thermoset polymer molding composition or polymer molding, film, filament or fiber comprising 0.1 to 45% by weight of a flame retardant mixture comprising at least one flame retardant and aluminum phosphites wherein the aluminum phosphites are selected from the group consisting of the formulae (II), (III) and mixtures thereof

Al 2.00 M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

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,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

is 2 to 2.99,

is 2 to 0.01 and

is 0 to 4,

mixtures of aluminum phosphite of the formula (III) with aluminum salts, 55 to 99.9% by weight of thermoplastic or thermoset polymer or mixtures thereof, 0 to 55% by weight of additives and 0 to 55% by weight of filler or a reinforcing material, where the sum of the components is 100% by weight.

14. A flame-retardant thermoplastic or thermoset polymer molding composition or polymer molding, film, filament or fiber comprising 1 to 30% by weight of a flame retardant mixture comprising at least one flame retardant and aluminum phosphites wherein the aluminum phosphites are selected from the group consisting of the formulae (II), (III) and mixtures thereof

Al 2.00 M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

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,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

u is 2 to 2.99,

t is 2 to 0.01 and

s is 0 to 4,

mixtures of aluminum phosphite of the formula (III) with aluminum salts. 10 to 97% by weight of thermoplastic or thermoset polymer or mixtures thereof, 1 to 30% by weight of additives and 1 to 30% by weight of filler or a reinforcing material, where the sum of the components is 100% by weight.

15. A flame-retardant thermoplastic or thermoset polymer molding composition or polymer molding, film, filament or fiber comprising a flame retardant mixture comprising at least one flame retardant and aluminum phosphites wherein the aluminum phosphites are selected from the group consisting of the formulae (II), (III) and mixtures thereof

Al 2.00 M z (HPO 3 ) y (OH) v x (H 2 O) w   (II)

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,

Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x (H 2 O) s   (III)

wherein

u is 2 to 2.99,

t is 2 to 0.01 and

s is 0 to 4,

mixtures of aluminum phosphite of the formula (III) with aluminum salts wherein the polymer is a thermoplastic polymer of the HI (high-impact) polystyrene, polyphenylene ether, polyamide, polyester or polycarbonate type, blends or polymer blends of the ABS (acrylonitrile-butadiene-styrene), PC/ABS (polycarbonate/acrylonitrile-butadiene-styrene), PPE/HIPS (polyphenylene ether/HI polystyrene) polymer type, thermoset polymers of the unsaturated polyester or epoxy resin type or mixtures thereof.