Moulding compositions contain polycarbonate and graft copolymer of a resin forming monomer on a rubber

A moulding composition of:

• from 70 to 30 parts by weight of a thermoplastic polycarbonate which is a mixture of 50-85% by weight of a polycarbonate made from a halogen free phenol and 15-50% by weight of a halogen containing polycarbonate of the formula ##SPC3##
• wherein
• n is 15-200
• X is alkylene or alkylidene having 1-5 carbon atoms;
• cycloalkylene or cycloalkylid having 5-15 carbon atoms;
• a single bond;--O--;
• or ##SPC4##
• and Hal is chlorine or bromine;
• and from 30 to 70 parts by weight of from 25 to 100% by weight of a graft polymer of a rubber onto which a
• grafting monomer mixture of
• from 95 to 50% by weight of styrene, methyl methacrylate or a mixture thereof, and
• from 50 to 5% by weight of acrylonitrile, methyl methacrylate or a mixture thereof is polymerized
• wherein
• a. the ratio by weight of the rubber to said grafting monomer mixture is within the range of from 85:15 to 40:60;
• b. the graft copolymer in the moulding composition consists of particles having an average diameter of from 0.2 to 5.0.mu.;
• and
• c. the moulding composition contains from 10 to 35% by weight of the rubber.