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

Claim 7:
8. The composition as claimed in claim 1, comprising:
A) ≥52% to ≤55% by weight of aromatic polycarbonate having an average molecular weight MW of 23 000 g/mol to 25 000, a softening temperature VST/B 120 according to ISO 306:2014-3 of 145° C. to 150° C. and a melt-volume flow rate according to ISO 1133:2012-03 of 18.0 cm3/(10 min) to 20.0 cm3/(10 min) at 300° C. and a 1.2 kg load;
B) ≥28% to ≤30% by weight of talc having a D50 value for the particle size distribution of ≥2 μm to ≤2.5 μm;
C) ≥1% to ≤2% by weight of anhydride-modified alpha-olefin polymer having an acid number of ≥75 to ≤80 mg KOH/g and an average molecular weight MW of ≥20 000 to ≤21 000 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;
FR) ≥0.4% to ≤0.6% by weight of fluoropolymer-containing anti-drip agent and ≥5% to ≤8% by weight of cyclic phosphazene;
D) ≥7% by weight to ≤8% by weight of barium sulfate;
E) ≥0% by weight to ≤1.2% by weight of titanium dioxide;
wherein the reported % by weight values are based on the total weight of the composition and sum to ≤100% by weight.