| abstract |
The invention relates to a flame retardant mixture for thermoplastic polymers, comprising as component A) 30% to 55% by weight of a zinc salt of a dialkylphosphinic acid of the formula (I) in which R1 and R2 are the same or different and are C1-C18-alkyl linear, branched or cyclic, C6-C18-aryl, C7-C18-arylalkyl and/or C7-C18-alkylaryl, and M is zinc and m = 1 to 2, as component B) 45% to 70% by weight of one or more reaction products of melamine with polyphosphoric acids and/or condensed melamine with polyphosphoric acids, as component C) 0% to 10% of at least one further inorganic flame retardant which is zinc borate, zinc stannate, zinc phosphate, zinc pyrophosphate, magnesium borate and/or calcium stannate, as component D) 0% to 20% by weight of one or more condensation products of melamine, as component E) 0% to 2% by weight of at least one phosphite or phosphinite or mixtures thereof and as component F) 0% to 2% by weight of at least one ester and/or salt of long chain aliphatic carboxylic acids (fatty acids) typically having chain lengths of C14 to C40, where the sum total of the components is always 100% by weight. |