Flame retardant combination for thermoplastic polymers
View Patent ↗The invention relates to a novel flame retardant and stabilizer combined for thermoplastic polymers, which comprises, as component A, from 20 to 80% by weight of a phosphinic salt of the formula (I) and/or of a diphosphinic salt of the formula (II), and/or polymers of these, where R 1 , R 2 are identical or different and are C 1 -C 6 -alkyl, linear or branched, and/or aryl; R 3 is C 1 -C 10 -alkylene, linear or branched, C 6 -C 10 -arylene, -alkylarylene or -arylalkylene; M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K, and/or a protonated nitrogen base; m is 1 to 4; n is 1 to 4; x is 1 to 4, and comprises, as component B, from 10 to 75% by weight of a nitrogen-containing synergist, and, as component C, from 10 to 75% by weight of a phosphorus/nitrogen flame retardant, the entirety of the components always being 100% by weight.
1. A flame retardant and stabilizer combined, for thermoplastic polymers, which comprises, as component A, from 20 to 80% by weight of a phosphinic salt of the formula (I) a diphosphinic salt of the formula (II), a polymer of the phosphinic salt of the formula (I), a polymer of the diphosphinic salt of the formula (II), or a mixture thereof,
where
R 1 , R 2 are identical or different and are C 1 -C 6 -alkyl, linear or branched, or aryl;
R 3 is C 1 -C 10 -alkylene, linear or branched, C 6 -C 10 -arylene, -alkylarylene or -arylalkylene;
M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K, or a protonated nitrogen base;
m is 1 to 4;
n is 1 to 4;
x is 1 to 4,
as component B, from 10 to 40% by weight of a condensate of melamine selected from the group consisting of melem, melam, melon, and components thereof having higher condensation levels, and, as component C, from 10 to 40% by weight of a melamine polyphosphate, melem polyphosphate, melam polyphosphate, melon polyphosphate or their mixture thereof the entirety of the components always being 100% by weight.
2. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein R 1 and R 2 are identical or different, and are C 1 -C 6 -alkyl, linear or branched, or phenyl.
3. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein R 1 and R 2 are identical or different and are methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-pentyl or phenyl.
4. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein R 3 is methylene, ethylene, n-propylene, isopropylene, n-butylene, tert-butylene, n-pentylene, n-octylene, n-dodecylene; phenylene, naphthylene; methylphenylene, ethylphenylene, tert-butylphenylene, methylnaphthylene, ethylnaphthylene, tert-butylnaphthylene, phenylmethylene, phenylethylene, phenylpropylene, or phenylbutylene.
5. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein M is calcium, aluminum, or zinc.
6. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein component C is a nitrogen-containing phosphate of the formulae (NH 4 PO 3 ) z , where z is from 1 to 10 000.
7. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein component C is ammonium polyphosphate.
8. The flame retardant and stabilizer combined, as claimed in claim 1 , wherein component C is at least two different melamine polyohosphates.
9. The flame retardant and stabilizer combined, as claimed in claim 1 , further comprising carbodiimides.
10. The flame retardant and stabilizer combined, as claimed in claim 1 , further comprising, as component D, from 0.1 to 10% by weight of at least one organic or inorganic zinc compound or a mixture thereof.
11. The flame retardant and stabilizer combined, as claimed in claim 10 , wherein component D is zinc oxide, zinc borate, zinc stannate or mixtures thereof.
12. The flame retardant and stabilizer combined, as claimed in claim 10 , comprising from 50 to 80% by weight of component A, from 10 to 40% by weight of component B, from 10 to 40% by weight of component C, and from 0.1 to 10% by weight of component D.
13. The flame retardant and stabilizer combined, as claimed in claim 10 , comprising from 50 to 80% by weight of component A, from 10 to 40% by weight of component B, from 10 to 40% by weight of component C, and from 0.1 to 7% by weight of component D.
14. A flame-retardant plastic molding composition, comprising a flame retardant and stabilizer combined, as claimed in claim 1 .
15. The flame-retardant plastic molding composition as claimed in claim 14 , wherein the plastic is a thermoplastic polymer.
16. The flame-retardant plastics molding composition as claimed in claim 14 , wherein the plastic is a polyamide, polyester or polyphenylene ether/high impact polystyrene blend.
17. The flame-retardant plastic molding composition as claimed in claim 14 , comprising from 2 to 50% by weight of the flame retardant and stabilizer combined, based on the plastics molding composition.
18. The flame-retardant plastic molding composition as claimed in claim 15 , comprising from 10 to 30% by weight of the flame retardant and stabilizer combined, based on the plastics molding composition.
19. A polymer article comprising a flame retardant and stabilizer combined, as claimed in claim 1 .
20. The polymer article as claimed in claim 19 , wherein the polymer is selected from the group consisting of high impact polystyrene, polyphenylene ethers, polyamides, polyesters, polycarbonates, and blends or polyblends of acrylonitrile-butadiene-styrene, or polycarbonate/acrylonitrile-butadiene-styrene.
21. The polymer article as claimed in claim 19 , comprising from 2 to 50% by weight of the flame retardant and stabilizer combined, based on the polymer content.
22. The polymer article as claimed in claim 19 , comprising from 10 to 30% by weight of the flame retardant and stabilizer combined, based on the polymer content.