Block copolymers of acrylate and methacrylate units

A molding material containing, based on the sum of A, B, and C:

• A:
• from 1 to 99% by weight of a linear, star or dendrimeric block copolymer A, composed of
• A1:
• from 10 to 90% by weight of at least one block of one or more acrylates of an alcohol of 1 to 8 carbon atoms and
• A2:
• from 10 to 90% by weight of at least one block of one or more methacrylates of an alcohol of 1 to 8 carbon atoms, each block having a number average molecular weight of M.sub.n of from 1,000 to 100,000 g/mol and the quotient M.sub.w /M.sub.n (weight average/number average) of each block being less than 2,
• B:
• from 1 to 99% by weight of a copolymer B composed of from 50 to 95% by weight of styrene or a substituted styrene or of a C.sub.1 -C.sub.8 -alkyl (meth)acrylate and at least one further monomer selected from the group consisting of acrylonitrile, methacrylonitrile, N-alkyl- or N-aryl-substituted maleimide, maleic anhydride, acrylic acid and acrylamide, and,
• C:
• is present in an amount up to 98% by weight of a homopolymer or graft copolymer C of, based on the sum of C1 and C2,
• C1:
• from 50 to 100% by weight of an acrylate rubber C1 and
• C2:
• up to 50% by weight of one or more shells which may be grafted onto C1 and consist of
• C21:
• from 35 to 75% by weight of at least one styrene or substituted styrene or (meth)-acrylate and
• C22:
• from 25 to 65% by weight of acrylonitrile, methacrylonitrile, N-alkyl- or N-aryl-substituted maleimide, maleic anhydride, acrylic acid or acrylamide.