Abstract: The invention relates to a process for producing flame-retardant, non-corrosive, highly flawable polyamides and polyesters, which comprises using a flame retardant mixture made of a phosphinic salt of the formula (I), where M?Al, Mg, Ca, Ti, or Na (component A) in which R1 and R2 are identical or different and are C1-C6-alkyl, linear or branched, and/or aryl; n is from 1 to 3, and, as component B, a metal salt of an organic acid, and/or an inorganic zinc, calcium, magnesium, potassium, sodium, aluminum, titanium, tin, antimony, bismuth, or barium compound, where the amount of component A present in the flame retardant mixture is from 70 to 99.5% by weight and the amount of component B present in the flame retardant mixture is from 0.5 to 30% by weight.