Compositions comprising A) 55 to 90 parts by weight (based on the sum of the parts by weight of components A, B and C) of aromatic polycarbonate and/or aromatic polyester carbonate with a relative solution viscosity, measured in methylene chloride, of 1.20 to 1.30, B) 10 to 45 parts by weight (based on the sum of the parts by weight of components A, B and C) of rubber-modified component comprising B.1) at least one graft polymer, produced by emulsion polymerisation, by graft polymerisation of B.1.1) 5 to 95 wt.%, based on the sum of B.1.1 and B.1.2, of at least one vinyl monomer on B.1.2) 95 to 5 wt.%, based on the sum of B.1.1 and B.1.2, of one or more particulate rubbers as backbones with glass transition temperatures of < 0°C, B.2) a rubber-free vinyl (co)polymer, B.3) optionally a graft polymer of at least one vinyl monomer on at least one rubber backbone with a glass transition temperature of < 0°C, produced by a bulk, solution or bulk-suspension polymerisation process, wherein the graft polymers B.1 and B.3, in addition to graft particles, may optionally also comprise as a result of their production free (co)polymer of the vinyl monomers, i.e. not chemically bonded to the rubber particles and/or included in the graft particles in a form that is insoluble in organic solvents, C) 0 to 25 parts by weight (based on the sum of the parts by weight of components A, B and C) of polymer additives, characterized in that (i) the rubber content of the polycarbonate composition is 1 to 6 wt.%, and (ii) at least 40 wt.% of the graft particles in component B have a diameter (measured by ultracentrifuge) of up to 200 nm, and (iii) in that up to 25 wt.% of the graft particles in component B have a diameter (measured by ultracentrifuge) of over 400 nm, wherein the entirety of components A + B + C is standardised to 100 parts by weight. A) 55 to 90 parts by weight (based on the sum of the parts by weight of components A, B and C) of aromatic polycarbonate and/or aromatic polyester carbonate with a relative solution viscosity, measured in methylene chloride, of 1.20 to 1.30, B) 10 to 45 parts by weight (based on the sum of the parts by weight of components A, B and C) of rubber-modified component comprising B.1) at least one graft polymer, produced by emulsion polymerisation, by graft polymerisation of B.1.1) 5 to 95 wt.%, based on the sum of B.1.1 and B.1.2, of at least one vinyl monomer on B.1.2) 95 to 5 wt.%, based on the sum of B.1.1 and B.1.2, of one or more particulate rubbers as backbones with glass transition temperatures of < 0°C, B.2) a rubber-free vinyl (co)polymer, B.3) optionally a graft polymer of at least one vinyl monomer on at least one rubber backbone with a glass transition temperature of < 0°C, produced by a bulk, solution or bulk-suspension polymerisation process, wherein the graft polymers B.1 and B.3, in addition to graft particles, may optionally also comprise as a result of their production free (co)polymer of the vinyl monomers, i.e. not chemically bonded to the rubber particles and/or included in the graft particles in a form that is insoluble in organic solvents, B.1) at least one graft polymer, produced by emulsion polymerisation, by graft polymerisation of B.1.1) 5 to 95 wt.%, based on the sum of B.1.1 and B.1.2, of at least one vinyl monomer on B.1.2) 95 to 5 wt.%, based on the sum of B.1.1 and B.1.2, of one or more particulate rubbers as backbones with glass transition temperatures of < 0°C, B.1.1) 5 to 95 wt.%, based on the sum of B.1.1 and B.1.2, of at least one vinyl monomer on B.1.2) 95 to 5 wt.%, based on the sum of B.1.1 and B.1.2, of one or more particulate rubbers as backbones with glass transition temperatures of < 0°C, B.2) a rubber-free vinyl (co)polymer, B.3) optionally a graft polymer of at least one vinyl monomer on at least one rubber backbone with a glass transition temperature of < 0°C, produced by a bulk, solution or bulk-suspension polymerisation process, wherein the graft polymers B.1 and B.3, in addition to graft particles, may optionally also comprise as a result of their production free (co)polymer of the vinyl monomers, i.e. not chemically bonded to the rubber particles and/or included in the graft particles in a form that is insoluble in organic solvents, C) 0 to 25 parts by weight (based on the sum of the parts by weight of components A, B and C) of polymer additives, (i) the rubber content of the polycarbonate composition is 1 to 6 wt.%, and (ii) at least 40 wt.% of the graft particles in component B have a diameter (measured by ultracentrifuge) of up to 200 nm, and (iii) in that up to 25 wt.% of the graft particles in component B have a diameter (measured by ultracentrifuge) of over 400 nm,