Molding materials based on polymethyl methacrylate and having improved notched impact strength

Abstract

Molding materials based on polymethyl methacrylate comprising essentially A) from 99.99 to 95.0% by weight of a mixture comprising essentially a.sub.1) from 5 to 95% by weight of polymethyl methacrylate, obtainable by polymerizing a mixture comprising essentially a.sub.11) from 80 to 100% by weight of methyl methacrylate and a.sub.12) from 0 to 20% by weight of a C.sub.1 -C.sub.20 -alkyl ester of acrylic acid, and a.sub.2) from 95 to 5% by weight of a multistage graft copolymer based on a C.sub.1 -C.sub.20 -alkyl ester of acrylic and/or methacrylic acid and B) from 0.01 to 5.0% by weight of a polysiloxane of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.6 -alkyl or C.sub.6 -C.sub.10 -aryl, R.sup.2 is hydroxy-C.sub.1 -C.sub.6 -alkyl or amino-C.sub.1 -C.sub.6 -alkyl, and n is a natural number from 5 to 200.

Dependencies are inferred from the claim text.