| 摘要 |
The invention relates to a polymer mixture comprising A) 55-90% by weight of an aromatic polycarbonate (A1) or a mixture of an aromatic polycarbonate (A1) and a polyalkylene terephthalate (A2); B) 10-30% by weight of a graft copolymer built up from a diene rubber graft base on which at least one of the following vinyl monomers has been grafted: styrene, acrylonitrile, methyl methacrylate; C) 0-15% by weight of a copolymer of styrene, alphamethyl styrene, methyl methacrylate or mixtures thereof and acrylonitrile, methacrylonitrile, methyl methacry late or mixtures thereof, the percentages by weight being calculated with respect to the sum of the constituents A, B and C, the diene rubber graft base having a monodisperse particle size distribution having such a narrow particle size distribution that the diameter of more than 50% by weight of the particles lies between 200 and 300 nanometers and the diameter of more than 70% by weight of the particles lies between 200 and 400 nanometers. The use of a graft copolymer having a certain particle size distribution results in a polymer mixture having improved properties.
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