Polycarbonate moulding compounds

Claim 1

A thermoplastic moulding composition which comprises (1) 10 to 95% by weight of an aromatic polycarbonate having a molecular weight of 10,000 to 200,000 in which at least 50% of the recurrent structural units in the linear chains are of the formula ##STR5## in which R is C 1 -C 3 alkyl and X is C 1 -C 10 alkylene, C 1 -C 10 alkylidene, C 5 -C 15 cycloalkylene, C 5 -C 15 cycloalkylidene or ##STR6## (2) 5 to 90% by weight of a member selected from the group consisting of (a) a thermoplastic resin based on (i) styrene, α-methylstyrene, α-chlorostyrene, p-chlorostyrene, 2,4-dichlorostyrene, p-methylstyrene, 3,4-dimethylstyrene, o- and p-divinyl benzene, p-methyl-α-methylstyrene, p-chloro-α-methylstyrene or a mixture thereof or (ii) styrene, α-methylstyrene, α-chlorostyrene, p-chlorostyrene, 2,4-dichlorostyrene, p-methylstyrene, 3,4-dimethylstyrene, o- and p-divinyl benzene, p-methyl-α-methylstyrene, p-chloro-α-methylstyrene or a mixture thereof together with at least one monomer selected from the group consisting of nitriles and esters of acrylic and methacrylic acid; (b) a rubber based on a conjugated diene having 4-8 carbon atoms, a rubber based on said conjugated diene and copolymerized styrene, acrylonitrile or acrylic acid ester, a polyalkenamer rubber or an ethylene-propylene-diene rubber, (c) a graft polymer of the monomers of (a) onto the rubbers of (b) and (d) a mixture of at least two of components (a), (b) and (c).