Thermoplastic molding material with a matt effect

A thermoplastic molding material containing, based on the sum of its constituents A, B and C,

• A:
• 70 to 99% by weight of a thermoplastic resin A comprising, based on A,
• A1:
• 50 to 100% by weight of a hard matrix A1 comprising, based on A1:
• A11:
• 50 to 95% by weight of units of styrene (A11) and
• A12:
• 5 to 50% by weight of units of acrylonitrile A12;
• A2:
• up to 50% by weight of a rubber-elastic particulate graft copolymer A2 comprising, based on A2,
• A21:
• 30 to 80% by weight of at least one elastomeric graft base A21 having a median particle size of from 30 to 1000 nm comprising, based on A21,
• A211:
• 50 to 100% by weight of units of a 1,3-diene or a C.sub.4 -C.sub.8 alkyl acrylate forming rubber-elastic polymers (A211),
• A212:
• up to 50% by weight of units of styrene A212;
• and
• A22:
• 15 to 85% by weight of a graft shell A22 comprising, based on A22,
• A221:
• 50 to 90% by weight of units of styrene A221 and
• A222:
• 10 to 50% by weight of units of acrylonitrile A222;
• said thermoplastic resin A being obtained by emulsion polymerization of 15 to 85% by weight of an elastomer in the form of a latex and based on butadiene containing up to 30% by weight of styrene, or of a polymer, also in the form of a latex, of an ester of acrylic acid, as graft base, with 15 to 85% by weight of styrene and acrylonitrile in a ratio of styrene and acrylonitrile 20:1 to 4:6;
• B:
• 0.5 to 15% by weight of a nitrile rubber B comprising, based on B,
• B1:
• 10 to 40% by weight of units of acrylonitrile, and
• B2:
• 60 to 90% by weight of units of butadiene;
• and
• C:
• 0.5 to 15% by weight of a particulate polymer C distributed in the hard matrix A and comprising, based on C,
• C1:
• 80 to 99% by weight of units of methyl methacrylate,
• C2:
• 0.5 to 15% by weight of units of an ester of acrylic acid,
• C3:
• 0.5 to 5% by weight of units of a crosslinking monomer copolymerizable with C1 and C2, and
• C4:
• up to 10% by weight of units of a polar monomer selected from (meth)acrylic acid, hydroxyethyl (meth)acrylate and dimethylaminoethyl (meth)acrylate,
• the median particle size of C being from 50 to 50,000 nm.