Masses and resilient transparent molding high resistance to stress cracking and a matt surface.

The invention relates MASSES molded thermoplastic, containing a mixture from essentially (A) 15 to 70% by weight of a POLYMERIZED METHACRYLATE obtainable by polymerizing a mixture essentially COMPOUND (A1) 90 to 100% by weight, based A methylmethacrylate (A) and (A2) 0 to 20% by weight, based on (A), an ester C {SUB 1} - C {SUB, 8} - acrylic acid alkyl, and (B) 10 to 50% by weight of a copolymerized, obtainable by polymerizing a mixture composed essentially of (b1) 78 to 88 weight% RE (B) A vinylaromatic monomer and (B2) 12 to 22% by weight, based A (B) A VINILCIANIDA and (C) 20 to 50% by weight of a graft copolymer ATTAINABLE eSSENTIALLY from (C1) 50 to 80% by weight of a core obtainable by polymerizing a monomer mixture consisting essentially of DE (C11) 50 to 100% by weight of a 1,3 - dienes and (C12) from 0 to 50% BY WEIGHT OF U N vinylaromatic monomer and (C2) 20 to 50% by weight of a graft shell obtainable by polymerizing a monomer mixture in the presence of the core (C1), ESSENTIALLY COMPOUND (C21) 40 to 100% by weight of an ester C {SUB 1} - C {SUB, 8} methacrylic acid alkyl or acrylic acid and (C22) from 0 to 60% by weight of a vinylaromatic monomer, with the proviso that the particle size MEDIUM (D {SUB, 50}) OF cHOSEN graft copolymer in the zone from 40 to 500 nm and (D) 0.5 to 15% by weight of a cROSSLINKED ACRYLIC pOLYMERIZED obtainable by polymerizing a mixture essentially COMPOUND (D1) 80 TO 99.5% by weight of a C ESTER SUB {1} - C {SUB, 8 methacrylic acid alkyl}, (D2) 0 to 15% by weight of an ester C SUB {1} - C {SUB, 8 acrylic acid alkyl}, (D3) 0.5 to 5% by weight of a crosslinking monomer copolymerizable with D1 and D2 and (D4) 0 to 10% by weight of a monomer POLAR CHOSEN FROM GROUP, COMPOUND methacrylic acid, acrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, dimethylaminoethyl acrylate and dimethylaminoethyl, with the proviso that the particle size Medium (D {SUB 50} D CHOSEN IN THE ZONE 50 to 80,000 UM, Y (E) EVENTUALLY additives USUAL IN AMOUNTS OF UP TO 20% BY WEIGHT WITH REFERENCE TO THE SUM OF COMPONENTS A, B, C, the amounts in weight percentages of A, B, C AND ARE IN ADDITION ON 100 AND THE DIFFERENCE BETWEEN THE INDEX refraction COMPONENT OF CY THE MIXING OF COMPONENTS A, B, E EVENTUALLY DY is less than 0.005.