Compositions comprising A) from 10 to 90 parts by weight aromatic polycarbonate and/or aromatic polyester carbonate, B) from 0.5 to 30 parts by weight rubber-modified graft polymer, C) from 0 to 40 parts by weight resin-like, thermoplastic and rubber-free vinyl (co)polymer (C.1) and/or polyalkylene terephthalate (C.2), D) from 0.1 to 10.0 parts by weight polyorganosiloxane/filler granulate, comprising at least one polyorganosiloxane (D.1) and from 1 to 200 parts by weight, based on 100 parts by weight of the polyorganosiloxane (D.1), of a reinforcing filler (D2.) characterised in that the polyorganosiloxanes (D.1) of component consist of units of the general formula R r SiO (4-r)/2 wherein - R is selected from the group comprising the vinyl, allyl, methallyl, 1-propenyl, 1-butenyl, 1-pentenyl radical, the 5-hexenyl, butadienyl, hexadienyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, ethynyl, propargyl, 1-propynyl, methyl, 3-chloropropyl, 3,3,3-trifluoropropyl, perfluorohexylethyl, p-chlorophenyl and p-chlorobenzyl radicals, - r is 0, 1, 2 or 3, and - the average numerical value of r is within a range from 1.9 to 2.1. characterised in that the polyorganosiloxanes of component D have a mean molecular weight M n of from 200,000 g/mol to 800,000 g/mol characterised in that the reinforcing filler (D.2) is selected from the group comprising pyrogenic and precipitated silicas having BET surface areas of at least 50 m 2 /g (according to DIN 66131/2). E) from 0 to 20.0 parts by weight of an inorganic compound having a Mohs hardness of at least 2.5 selected from the group comprising silicates, aluminosilicates, carbides, nitrides, in particular boron nitride, silicon carbide, tungsten carbide, boron carbide, and cerium oxide, kaolin and aluminium oxide (corundum), F) from 0 to 20 parts by weight of at least one phosphorus-containing flameproofing agent, G) from 0 to 10 parts by weight of at least one further additive selected from the group comprising of flameproofing synergists, antidripping agents, lubricants and mould release agents, nucleating agents, stabilisers, antistatics, colourings and pigments. all parts by weight being so normalised that the sum of the parts by weight of all the components A+B+C+D+E+F+G in the composition is 100. A) from 10 to 90 parts by weight aromatic polycarbonate and/or aromatic polyester carbonate, B) from 0.5 to 30 parts by weight rubber-modified graft polymer, C) from 0 to 40 parts by weight resin-like, thermoplastic and rubber-free vinyl (co)polymer (C.1) and/or polyalkylene terephthalate (C.2), D) from 0.1 to 10.0 parts by weight polyorganosiloxane/filler granulate, comprising at least one polyorganosiloxane (D.1) and from 1 to 200 parts by weight, based on 100 parts by weight of the polyorganosiloxane (D.1), of a reinforcing filler (D2.) characterised in that the polyorganosiloxanes (D.1) of component consist of units of the general formula R r SiO (4-r)/2 wherein - R is selected from the group comprising the vinyl, allyl, methallyl, 1-propenyl, 1-butenyl, 1-pentenyl radical, the 5-hexenyl, butadienyl, hexadienyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, ethynyl, propargyl, 1-propynyl, methyl, 3-chloropropyl, 3,3,3-trifluoropropyl, perfluorohexylethyl, p-chlorophenyl and p-chlorobenzyl radicals, - r is 0, 1, 2 or 3, and - the average numerical value of r is within a range from 1.9 to 2.1. characterised in that the polyorganosiloxanes of component D have a mean molecular weight M n of from 200,000 g/mol to 800,000 g/mol characterised in that the reinforcing filler (D.2) is selected from the group comprising pyrogenic and precipitated silicas having BET surface areas of at least 50 m 2 /g (according to DIN 66131/2). - R is selected from the group comprising the vinyl, allyl, methallyl, 1-propenyl, 1-butenyl, 1-pentenyl radical, the 5-hexenyl, butadienyl, hexadienyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, ethynyl, propargyl, 1-propynyl, methyl, 3-chloropropyl, 3,3,3-trifluoropropyl, perfluorohexylethyl, p-chlorophenyl and p-chlorobenzyl radicals, - r is 0, 1, 2 or 3, and - the average numerical value of r is within a range from 1.9 to 2.1. E) from 0 to 20.0 parts by weight of an inorganic compound having a Mohs hardness of at least 2.5 selected from the group comprising silicates, aluminosilicates, carbides, nitrides, in particular boron nitride, silicon carbide, tungsten carbide, boron carbide, and cerium oxide, kaolin and aluminium oxide (corundum), F) from 0 to 20 parts by weight of at least one phosphorus-containing flameproofing agent, G) from 0 to 10 parts by weight of at least one further additive selected from the group comprising of flameproofing synergists, antidripping agents, lubricants and mould release agents, nucleating agents, stabilisers, antistatics, colourings and pigments.