High impact strength, readily flowing polyamide moulding materials

A thermoplastic moulding material comprising,

• (A) 35-99% by weight polyamide,
• (B) 1-65% by weight graft product, and
• (C) 0-1% by weight, based on total weight of A and B, of fine particles of polytetrafluoroethylene, where B comprises,
• (B1) 65-85% by weight of a graft base, where B1 is a particulate, cross-linked diene rubber having an average particle diameter (d.sub.50) of 0.25-0.8 .mu.m, a gel content of at least 70% by weight and a glass transition temperature of less than -20.degree. C. and
• (B2) 35-15% by weight of a graft superstrate obtained by graft polymerizing, in the presence of a latex of B1, onto B1, more than 40% by weight of a monomer mixture based on the weight of B1 where the monomer mixture consists essentially of
• 98-82 parts by weight methyl methacylate,
• 2-18 parts by weight primary C.sub.2 -C.sub.20 -alkyl acrylate, 0.1-3 parts by weight of a urethane having acrylic acid ester or methacrylic acid ester groups in the molecule which are capable of copolymerization with B2.1 and B2.2, and 0.1-3 parts by weight of a tertiary acrylic acid butyl ester.