Patent ID: 9534109
Date: 2017-01-03
CPC Classifications: C08K

Claim:
1. A flame-retardant polymer molding composition comprising a polymer and a flame retardant-stabilizer combination, wherein the polymer comprises thermoplastic polymers of HI (high-impact) polystyrene, polyphenylene ether, polyamide, polyester or polycarbonate, blends or polymer blends of the ABS (acrylonitrile-hutadiene-styrene), PC/ABS (polycarbonate/acrylonitril-butadiene-styrene) or PPE/HIPS (polyphenlene ether/HI polystyrene) polymer, wherein the flame-retardant-stabilizer composition comprises as component A 30 to 79,9% by weight of a phosphinic salt of the formula (I), a diphosphinic salt of the formula (II), polymers thereof or mixtures thereof wherein R R M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K a protonated nitrogen base or a mixture thereof; m is 1 to 4; n is 1 to 4; x is 1 to 4, as component B 20 to 50% by weight of a nitrogen-containing synergist, a phosphorus/nitrogen flame retardant or a mixture thereof and as component C 0.1 to 20% by weight of a metal oxide coated with a metal salt and/or a metal hydroxide coated with a metal salt, wherein the metal oxide is selected from the group consisting of magnesium oxide, calcium oxide, zinc oxide, manganese oxide, tin oxide and mixtures, and wherein the metal salt is selected from the group consisting of zinc phosphate, zinc molybdate, zinc stannate, magnesium phosphate, calcium phosphate and mixtures thereof, component C comprising 50 to 95% by weight of the metal oxide, and 5 to 50% by weight of the metal salt and the sum of components A to C always being 100% by weight.