Additive mixtures for plastics, laser-markable polymer compositions comprising them and the use thereof

A polymer composition comprising a thermoplastic polymer selected from a polyamide and a polyester, and an additive mixture for plastics comprising:

• a phosphinic salt of the formula (I) as component A
• in which R1 and R2 are ethyl,
• M is Al, Fe, TiOp or Zn,
• m is 2 to 3, and
• p=(4−m)/2;
• a compound selected from the group of the Al, Fe, TiOp and Zn salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid as component B;
• a phosphonic salt of the formula II as component C
• in which R3 is ethyl,
• Met is Al, Fe, TiOq or Zn,
• n is 2 to 3, and
• q=(4−n)/2;
• antimony- or fluorine-doped tin oxide, indium tin oxide and/or antimony oxide as component D,
• a colorant as component E,
• an inorganic phosphonate as component F, and
• the thermoplastic polymer as component G,
• wherein, in the polymer composition:
• the proportion of component A is 1% to 10% by weight,
• the proportion of component B is 0.01% to 3% by weight,
• the proportion of component C is 0.001% to 1% by weight, and
• the proportion of component D is 0.005% to 2% by weight,
• the proportion of component F is 0% to 10% by weight, and
• the proportion of component G is 25% to 95% by weight.