Molding materials having stress cracking resistance and based on PMMA/SAN blends

摘要

Molding materials having stress cracking resistance containing A) from 49 to 99% by weight of a polymer obtainable by polymerizing a C1-C20-alkyl ester of methacrylic or acrylic acid or a mixture of said esters, B) from 0.95 to 50% by weight of a polymer obtainable by polymerizing a monomer mixture comprising b1) from 75 to 82% by weight of a vinyl aromatic monomer and b2) from 18 to 25% by weight of acrylonitrile or methacrylonitrile or a mixture thereof, and C) from 0.05 to 1% by weight of a mixture containing c1) a triaryl phosphite of the formula I <IMAGE> I c2) an amine of the formula II <IMAGE> II where n is from 2 to 10, c3) a benzotriazole of the formula III <IMAGE> III and C4) a phenol.