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The invention relates to flameproofed UV-resistant polycarbonate molding materials having a good melt stability and a high fraction of free, reactive UV absorbers, wherein the polycarbonate compositions contain A) at least one polycarbonate having an average molecular weight M̅ w from 18, 000 to 40, 000, B) at least one organic flameproofing agent comprising diphenyl sulfone, alkali or alkaline-earth diphenyl sulfone sulfonate, and alkali or alkaline-earth diphenyl sulfone disulfonate, and C) one or more reactive UV absorbers, and wherein B) comprises diphenyl sulfone in a fraction from 1.10 wt % to 2.50 wt %, relative to the total mass of the component B).