Thermoplastic molding materials having good low-temperature impact strength

Claim 1

A thermoplastic molding material containing (based on the sum of A+B+C+D) A: from 20 to 80% by weight of a polycarbonate A, B: from 10 to 60% by weight of a thermoplastic copolymer B of (based in each case on B) b 1 : from 70 to 90% by weight of polymerized units b 1 of styrene, of α-methylstyrene or of a styrene alkylated in the nucleus and b 2 : from 10 to 30% by weight of polymerized units b 2 of (meth)acrylonitrile, C: from 5 to 30% by weight of a graft copolymer C of (based in each case on C) c 1 : from 20 to 60% by weight of a polybutadiene rubber c 1 and c 2 : from 80 to 40% by weight of a shell c 2 which is grafted thereon and consists of (based in each case on c 2 ) c 21 : from 70 to 90% by weight of polymerized units c 21 of styrene and c 22 : from 10 to 30% by weight of polymerized units c 22 of (meth)acrylonitrile, and D: from 5 to 30% by weight of a graft copolymer D of (based in each case on D) d 1 : from 20 to 60% by weight of a crosslinked acrylate rubber d 1 and d 2 : from 80 to 40% by weight of a shell d 2 which is grafted thereon and consists of (based in each case on d 2 ) d 21 : from 70 to 90% by weight of styrene d 21 of styrene and d 22 : from 10 to 30% by weight of polymerized units d 22 of (meth)acrylonitrile, with the proviso that the graft copolymer C has a median particle diameter of from 0.2 to 0.5 μm and the graft copolymer D has a median particle diameter of from 0.4 to 0.7 μm, determined in each case as the d 50 value of the integral mass distribution.