Composition comprising A) from 99.9 to 92 parts by weight (based on the sum of components A + B) of high molecular weight, thermoplastic, aromatic (co)polycarbonate having a molecular weight Mw (weight average) of at least 10 000 g·mol -1 and comprising structural units of one or more of formula(e) (Ia), (Ib) and (Ic), where R in each case represents hydrogen, C 1 -C 4 alkyl, aryl or aralkyl, preferably methyl or phenyl; B) from 0.1 to 8 parts by weight (based on the sum of components A + B) of one or more organically modified telechelic or comb polysiloxanes selected from the group consisting of polysiloxanes of general formulae (IIa) and (IIb) where the radicals R 1 in a molecule are identical or different and represent alkyl radicals comprising from 1 to 4 carbon atoms, A are identical or different and represent - R 2 -X, where R 2 is a radical having the general formula (IIC) R 3 is a divalent, optionally substituted alkyl or alkenyl radical comprising from 2 to 11 carbon atoms, R 4 are identical or different at each occurrence and are divalent, optionally substituted alkyl or aralkyl radicals, x independently of one another has a value of 0 or 1, y independently of one another has a value of from 0 to 100 and X is an amino group, n, k and r each independently of one another represent a number between 0 and 200, subject to the proviso that n, k and r are not all 0, and C) optionally additives. A) from 99.9 to 92 parts by weight (based on the sum of components A + B) of high molecular weight, thermoplastic, aromatic (co)polycarbonate having a molecular weight Mw (weight average) of at least 10 000 g·mol -1 and comprising structural units of one or more of formula(e) (Ia), (Ib) and (Ic), where R in each case represents hydrogen, C 1 -C 4 alkyl, aryl or aralkyl, preferably methyl or phenyl; B) from 0.1 to 8 parts by weight (based on the sum of components A + B) of one or more organically modified telechelic or comb polysiloxanes selected from the group consisting of polysiloxanes of general formulae (IIa) and (IIb) where the radicals R 1 in a molecule are identical or different and represent alkyl radicals comprising from 1 to 4 carbon atoms, A are identical or different and represent - R 2 -X, where R 2 is a radical having the general formula (IIC) R 3 is a divalent, optionally substituted alkyl or alkenyl radical comprising from 2 to 11 carbon atoms, R 4 are identical or different at each occurrence and are divalent, optionally substituted alkyl or aralkyl radicals, x independently of one another has a value of 0 or 1, y independently of one another has a value of from 0 to 100 and X is an amino group, n, k and r each independently of one another represent a number between 0 and 200, subject to the proviso that n, k and r are not all 0, and R 1 in a molecule are identical or different and represent alkyl radicals comprising from 1 to 4 carbon atoms, A are identical or different and represent - R 2 -X, where R 2 is a radical having the general formula (IIC) R 3 is a divalent, optionally substituted alkyl or alkenyl radical comprising from 2 to 11 carbon atoms, R 4 are identical or different at each occurrence and are divalent, optionally substituted alkyl or aralkyl radicals, x independently of one another has a value of 0 or 1, y independently of one another has a value of from 0 to 100 and X is an amino group, n, k and r each independently of one another represent a number between 0 and 200, subject to the proviso that n, k and r are not all 0, and C) optionally additives. <EOS>