Flame retardant mixtures and production thereof

Abstract

Flame retardant mixtures comprising as component (A) 30% to 99.9% by weight of dialkylphosphinic salts of the formula (II), a and b may be the same or different and are each independently 1 to 9, and where the carbon chains may be linear, branched or cyclic and M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K and/or a protonated nitrogen base and m is 1 to 4, as component (B) 0.1% to 70% by weight of alkyl hydroxyalkylphosphinyl organylcarboxylic acid salts and/or ester salts of the formula (I) where R1CyH2y+1 with y=2 to 8, R2, R3, R4, R5, R6 are the same or different and are each independently H, CxH2x+1, CxH2x−1, CxH2x−3, CxH2xCO2X, CxH2x−2CO2X, CxH2x−4CO2X, (C2H3CO2X)u and u=0 to 1000000, CO2X, CxH2x(P(O)(OM)R1), CxH2x−2(P(O)(OM)R1)(CO2X) and/or CH2CO2X, where, in the R1, R2, R3, R4, R5 and R6 groups, the carbon chains may be linear, branched or cyclic, M' is Mg, Ca, Al, Sb, Sn, Ge, Fe, Ti, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H and/or N-containing cations, x is 1 to 25, X is H, M, CzH2z+1 and z is 1 to 8, with the proviso that at least one of the R2, R3, R4, R5, R6 groups is not H, and the compounds of formula (II) and formula (I) are different compounds.