Patent ID: 11912865
Assignee: COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A thermoplastic composition, comprising:
A) at least one aromatic polycarbonate;
B) talc;
C) at least one anhydride-modified alpha-olefin polymer having an acid number of ≥30 mg KOH/g and an average molecular weight MW of ≥4000 to ≤40 000 g/mol, wherein the average molecular weight MW is determined by gel permeation chromatography in ortho-dichlorobenzene at 150° C. with polystyrene calibration and the acid number is determined by potentiometric titration with alcoholic potassium hydroxide solution according to DIN ISO 17025:2005, wherein the anhydride-modified alpha-olefin polymer C) comprises ≥90.0% to ≤98.0% by weight of alpha-olefin polymer and ≥2.0% to ≤10.0% by weight of anhydride, wherein the reported % by weight values are based on the total weight of the anhydride-modified alpha-olefin polymer and sum to ≤100% by weight;
FR) at least one organic flame retardant selected from: fluoropolymer-containing anti-drip agents, fluorinated sulfonic acid salts, organic phosphoric acid esters, phosphazenes or mixtures of at least two of the abovementioned agents;
D) at least one inorganic compound distinct from talc;, wherein, the composition contains barium sulfate in an amount of ≥3% by weight based on the total weight of the composition;, the composition contains alkaline earth metal sulfates distinct from barium sulfate in an amount of ≥0% by weight to ≤25% by weight based on the total weight of the alkaline earth metal sulfates present in the composition;, the composition contains organic phosphoric acid esters in an amount of ≥0% by weight to ≤7.5% by weight based on the total weight of the composition and, the composition contains ≥0.5% by weight based on the total weight of the composition of fluoropolymer-containing anti-drip agents,, wherein in the case where the composition contains ≥0.1% by weight based on the total weight of the composition of fluorinated sulfonic acid salts, the content of fluoropolymer-containing anti-drip agents is ≥0.7% by weight based on the total weight of the composition.