| abstract |
The invention relates to a flame-retardant polyamide composition comprising as component A) 1 to 96 wt .-% of one or more thermoplastic polyamides, as component B) 2 to 25 wt .-% of a Dialkylphosphinsäuresalzes of formula (I) and / or a Diphosphinsäuresalzes the formula (II) and / or their polymers, wherein R 1 , R 2 are identical or different and C 1 -C 6 -alkyl, linear or branched or H, R 3 is C 1 -C 10 -alkylene, linear or branched, C 6 -C 10 -arylene, C 7 -C 20 -alkylarylene or C 7 -C 20 -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 1 to 4; n 1 to 4; x 1 to 4 mean, as component C) 1 to 20 wt .-% of a salt of phosphorous acid as component D) from 1 to 20% by weight of a phosphazene as component E) from 0 to 50% by weight of filler or reinforcing material, as component F) 0 to 1 wt .-% of a phosphonite or a mixture of a phosphonite and a phosphite and as component G) 0 to 1 wt .-% of an ester or salt of long-chain aliphatic carboxylic acids (fatty acids), which typically have chain lengths of C 14 to C 40 , wherein the sum of the components is always 100 wt .-%. |